859 research outputs found
Rhombonemertes Hookabe & Moritaki & Jimi & Ueshima 2022, gen. nov.
No full text<i>3.1. Genus Rhombonemertes gen. nov.</i> <p>[New Japanese name: hishimochi-himomushi-zoku]</p> <p> Type species. <i>Rhombonemertes rublinea</i> sp. nov.</p> <p>Diagnosis. Eumonostiliferan with four eyes. Head with anterior and posterior cephalic furrows. Rhynchocoel short, less than half of body length; rhynchocoel musculature bilayered (outer circular and inner longitudinal muscles). Body-wall musculature not anteriorly divided. Some diagonal muscle fibers arranged as a lattice between outer longitudinal and inner circular muscle layers. Precerebral septum present. Dorsoventral muscles present. Oesophagus short, replaced with stomach in precerebral region. Intestinal caecum with lateral diverticula, not reaching brain anteriorly. Vascular plug lacking. Lateral nerves without accessory nerves.</p> <p> Etymology. The generic name refers to the diamond-shaped head of the present species, a composite of the Greek feminine ῥόμβος (<b> <i>rh´ombos</i> =</b> rhombus, diamond- or lozenge-shaped) <b>+</b> Nημερτής (<i>N¯emert</i> ḗ <b> <i>s</i> =</b> Nemertea).</p>Published as part of <i>Hookabe, Natsumi, Moritaki, Takeya, Jimi, Naoto & Ueshima, Rei, 2022, A new oerstediid discovered from wood falls in the Sea of Kumano, Japan: Description of Rhombonemertes rublinea gen. et sp. nov. (Nemertea: Eumonostilifera), pp. 154-162 in Zoologischer Anzeiger 301</i> on page 155, DOI: 10.1016/j.jcz.2022.10.003, <a href="http://zenodo.org/record/10375150">http://zenodo.org/record/10375150</a>
Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia
No full textYamazaki, Midori, Yamazaki, Kazunori, Rundell, J., Ueshima, Rei (2015): Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia. Zootaxa 4057 (4): 511-538, DOI: 10.11646/zootaxa.4057.4.
I remember playing Sunday sandlot baseball at Seabrook
No full textIn this "I remember" memoir, Rei Noguchi recalls playing baseball during the summer months at Seabrook. Some families provided the equipment for everyone to use. Players on one team would share their baseball gloves with the players on the other. Each team kept its own score, as well as designated an umpire. Rei found that it worked very well. Often, the adults would play against the kids, and Rei remembers the kids winning more games. The games were usually community events, and people would stop by to watch while doing errands around the town. The Seabrook Educational and Cultural Center has been soliciting current and past residents of Seabrook Farms for an "I remember" project. Residents are asked to create narratives regarding their experiences at Seabrook Farms. These memories help preserve the history and multi-cultural heritage of Seabrook Farms
Hungerfordia ngereamensis M. Yamazaki and Ueshima, sp. nov.
No full textHungerfordia ngereamensis M. Yamazaki and Ueshima sp. nov. (Figs. 2, 12 O) Material examined. Holotype. Chongelungel, south of Ngeream (Loc. BA 4 - 2), Airai state, Babeldaob island, Palau. Collected by R. U. and M. Y. on July 7, 2006. UMUTZ-MG-B0293T. Paratypes. Babeldaob: Loc. BA 3 -1, 10 specimens, 27 /VI/ 2005, UMUTZ-MG-B0172; Loc. BA 4 -2, 26 specimens, 7 /VII/ 2006, UMUTZ-MG-B0293. Diagnosis. Shell sinistral, large to medium-size for Hungerfordia species, slender conical. Shell color white, upper whorls frequently yellow or yellowish brown. Apical septum absent. Axial rib on most whorls highly protruded as spines, very widely spaced, strongly folded at the peripheries of the whorls; spiny projections of the ribs moderately high, rather narrow, arising at some distance below the suture; ribs above the aperture abruptly becoming closely spaced, with greatly reduced spiny projections, less folded. Interspace between the spiny ribs with some very weak and very short growth wrinkles below the suture on the lower whorls. Spiral sculptures present throughout teleoconch. Aperture weakly protruded. Columellar tooth very weakly emerged within the aperture in front view, but strongly developed deeply inward. Peristome triple, with doubled inner peristomes, stout. Outer peristome strongly developed, widely expanded. Inner peristome double, also expanded; distal inner peristome strongly developed just behind the proximal inner peristome, gradually narrowed toward the aperture; proximal inner peristome always narrower than the distal one in front view. Interspace between the outer and inner peristomes wide; outer surface with a series of fine and very low riblets at the abapertural half (near the outer peristome), almost smooth on the adapertural half (just behind the inner peristomes). Description. Shell (Figs. 2 A–F, 12 O). Shell sinistral, large to medium-size for Hungerfordia species, conical or fusiform, penultimate whorl widest (slightly wider than the last whorl) or last 2 whorls almost equally widest when removing the expanded ribs and peristomes; sides almost straight. Shell color white, upper whorls occasionally yellow. Whorls 6–7, slightly convex; last 1 / 8 whorls (including the interspace between the outer and inner peristomes) expanded upward and ascending onto the penultimate whorl in left lateral view. Suture weakly impressed. Constriction located above the parietal/columellar junction of the inner peristome, associated with abrupt changes of the ribbing pattern, internally without palatal plica except a low axial-crest caused by the constriction. Tuba 7 / 8 whorls. Protoconch 1 + 1 / 8 – 1 + 1 / 4 whorls, almost smooth, very weakly and finely punctated. Apical septum absent. Axial ribs strongly developed on the teleoconch, oblique to the coiling axis, highly protruded as spines on most whorls: ribs on the first 1 / 3 – 1 / 2 whorls of the initial teleoconch weak, almost straight (not folded at the peripheries of the whorls), initially closely spaced and very low, gradually becoming widely spaced and stronger; ribs on the subsequent whorls except above the aperture (ribs on most whorls except above the aperture) strong, highly protruded as spines, very widely spaced (9–11 ribs in a whorl), not synchronized with those on the previous whorls, strongly folded at the peripheries of the whorls, strongly elevated by axial protrusions of shell wall (along the ribs) on the last 3 / 4 whorls; upper margin of the ribs above the spiny projections (between the suture and spines) very low, never protruded, indistinct; spiny projections of the ribs high, pointed, folded at the peripheries of the whorls, trough-shaped, rather narrow, arising at some distance below the suture (arising near the peripheries of the whorls), upper margin folded over the lower margin, lower margin gradually decreased in height and extended below to the suture of the next whorl, with fine spiral sculptures on the outer surface, protruded upward on most whorls, becoming protruded laterally on the last 5 / 8 whorls; ribs above the aperture (ribs on the last 1 to last 3 / 4 whorls around the constriction) abruptly becoming low and closely spaced, with greatly reduced spiny projections (but still retaining very low spiny projections), less folded than those on the preceding whorl, becoming much less folded toward the aperture, partially hidden by the inner peristome. Interspace between the spiny ribs smooth on the upper whorls, with some growth wrinkles below the suture on the last 1.25–2.25 whorls; growth wrinkles developed below the suture on the lower whorls, closely spaced, short, very low, initially very weak, becoming rather prominent on the last 3 / 4 whorls. Spiral sculptures present throughout the teleoconch, fine, rather prominent, sinuous in high magnification, extending on the outer surface of the spiny ribs and outer peristome. Base rather convex, without basal fold; interspace between the ribs with a series of fine and short growth wrinkles around the columella. Axial protrusions of shell wall (along the ribs) on the last 3 / 4 whorls strongly developed, hidden by the spiny ribs in fresh specimens (becoming obvious after removal of the spiny projections of the ribs), associated with prominent axial depressions between them; abapertural side slightly or hardly convex in umbilical view; adapertural side well convex, wider than the abapertural side in umbilical view. Umbilicus closed in adult. Aperture hardly or slightly tilted against the coiling axis (in left lateral view), slightly protruded from the previous whorl; columellar axis within the aperture almost vertical or slightly oblique in front view. Columellar tooth present, very weakly appearing within the aperture in front view, but strongly developed deeply inside the aperture, never extended onto the inner peristome. Peristome triple, with an outer peristome and doubled inner peristomes. Outer peristome strongly developed, widely expanded, but hardly or only slightly expanded beyond the inner peristome in front view, obtusely angulate at the palatal side, frequently with a rounded baso-columellar edge, reflected backward, abruptly expanded from the preceding whorl, with concentric growth riblets or growth lines on the inner surface, with fine spiral sculptures on the outer surface. Inner peristome strongly protruded (separated) from the outer one, double with distal and proximal inner peristomes; distal inner peristome strongly developed just behind the proximal one, widely expanded, shortly expanded beyond the proximal one in front view; proximal inner peristome squarish circular, always narrower and weaker than the distal one, rather widely expanded, parietal margin almost straight and located near or below the middle level of the upper body whorl. Interspace between the outer and inner peristomes wide, with a series of fine riblets on the outer surface near the outer peristome, rather smooth near the inner peristome; uppermost margin (= suture) ascending onto the penultimate whorl toward the aperture in left lateral view; base extended almost horizontally in left lateral view. Dimensions. Shell height 4.5–5.3 mm, diameter 2.6–3.6 mm, suture width 1.9–2.1 mm, aperture height 1.8– 2.2 mm. Operculum (Figs. 2 G 1–4). Operculum corneous, multispiral, circular, transparent, amber colored, thin, flat; outer surface smooth; inner surface with a very weak arcuate ridge near the columellar margin. Penis. Penis absent. Radula. Not examined. Distribution and ecology. Endemic to Palau: Southern limestone coast of Babeldaob island. This species inhabits limestone rocks. Remarks. H. ngereamensis is most similar to H. triplochilus Yamazaki & Ueshima, 2013 (Figs. 12 O, P), but differs in the following points: the axial protrusions of shell wall along the ribs are strongly developed on the last 3 / 4 whorls; the riblets between the inner and outer peristomes are less developed, much lower than the latter species; the distal inner peristome is always wider and more strongly developed than the proximal inner peristome; the shell is broader and less slender; the distribution is endemic to Babeldaob island. H. ngereamensis differs from a sympatric congener, H. echinata tubulispina Yamazaki & Ueshima, 2013, in the following points: the spiny projections of the ribs are wider, never tubular; the inner peristome is double; the interspace between the outer and inner peristomes is wider; the axial ribs above the aperture have very short spiny projections. H. ngereamensis also differs from H. expansilabris Yamazaki & Ueshima, 2013, which is distributed in the same area of Babeldaob island, in the following points: the outer and inner peristomes are not so widely expanded as the latter species, more robust; the columellar tooth is present; the distal inner peristome is always wider and more strongly developed than the proximal inner peristome; the axial ribs above the aperture have short spiny projections. Etymology. The specific name is derived from the type locality. FIGURE 2. Hungerfordia ngereamensis sp. nov. (A 1–6) A topotypic paratype, Loc. BA 4 - 2, B0293a; (B 1–2) a topotypic paratype after removal of the spiny projections of the axial ribs, B0293b: (B 1) umbilical view, only the last whorl shown, note that the axial protrusions of the shell wall are strongly developed along the ribs; (B 2) oblique dorsal view, showing the axial protrusions of the shell wall on the last 3 / 4 whorls; (C 1–2) a yellowish and subfusiform specimen, a topotypic paratype, B0293c: (C 2) sculptures on the upper body whorl, showing the reduced axial ribs above the aperture; (D) columellar tooth, dorsal view of a partially opened shell, a topotypic paratype, B0293d; (E 1–6) holotype, B0293T; (F) a worn specimen, only the last whorl shown, note the axial protrusions of the shell wall which are usually hidden by spiny ribs in fresh specimens (see Fig. E 6), a topotypic paratype, B0293e; (G 1–2) outer surface, and (G 3–4) inner surface of operculum, a topotypic paratype, B0293. Scale bars, 1mm (A–F), 0.5 mm (G). All specimens, UMUTZ-MG.Published as part of Yamazaki, Midori, Yamazaki, Kazunori, Rundell, J. & Ueshima, Rei, 2015, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia, pp. 511-538 in Zootaxa 4057 (4) on pages 514-516, DOI: 10.11646/zootaxa.4057.4.3, http://zenodo.org/record/24168
Hungerfordia globosa M. Yamazaki and Ueshima, sp. nov.
No full textHungerfordia globosa M. Yamazaki and Ueshima sp. nov. (Figs. 11, 12A) Materials examined. Holotype. Northern part of Ngermalk island (Loc. Nm 5 - 1), Palau. Collected by R. U. on Nov. 13, 2006. UMUTZ-MG-B0521T. Paratype. Ngermalk: same data as holotype, 1 specimen, UMUTZ-MG- B0521. Diagnosis. Shell sinistral, very small for Hungerfordia species, subspherical. Shell color transparant, glossy. Axial ribs partially present on teleoconch; ribs on the apical 3 whorls present, closely spaced, low but distinct; ribs on the last 2 – 1 + 3 / 4 whorls absent, but reappearing just behind the thickened lip. Spiral sculpture very weakly developed only on the apical whorls, absent on most whorls. Dorsal grooves weakly developed on the last 3 / 4 whorls, axial, 4–5, widely spaced, shallow; interspace between the dorsal grooves wide, convex. Base convex, with a circum-columellar fold; circum-columellar fold prominently developed on the last 3 / 4 whorls, extended along the columellar side of the thickened lip, narrow, with fine growth lines on its suface. Outer peristome hardly developed. Inner peristome subcircular. Parietal tooth absent. Columellar tooth rather strongly developed. Thickened lip strongly developed behind the aperture, wide, gradually narrowed toward the aperture at the palatal and basal sides; dorsal margin distinct, abruptly expanded from the preceding whorl. FIGURE 11. Hungerfordia globosa sp. nov. (A 1–7, B 1–6) holotype, B0521T; (C) a topotypic paratype, Loc. Nm 5 - 1, B0521. Scale bars, 1mm. All specimens, UMUTZ-MG. Description. Shell (Figs. 11 A–C, 12 A). Shell sinistral, thick, very small for Hungerfordia species, subspherical, penultimate whorl widest when excluding the thickened lip; sides well convex (particulary on the last 3 whorls). Shell color transparant, rather glossy. Whorls 5 – 5 + 1 / 4, convex, broadest (in longitudinal width) on the penultimate whorls in dorsal view; last 3 / 4 whorls with axial dorsal grooves, with a circum-columellar fold; last 1 / 8 whorls (including the thickened lip) expanded upward, ascending onto the penultimate whorl in left lateral view. Suture impressed. Constriction located above the parietal/columellar junction of the aperture, less prominent in external view. Tuba 7 / 8 whorls. Protoconch 1 – 1 + 1 / 8 whorls, almost smooth, finely and very weakly punctated on lower whorl. Apical septum absent. Axial ribs poorly developed on teleoconch, partially disappearing, almost straight (never folded at the peripheries of the whorls), oblique to the coiling axis: ribs on apical 3 – 3 + 1 / 8 whorls of teleoconch present, closely spaced (14–17 ribs in a quarter whorl), weak but distinct, very low, becoming weaker on the penultimate whorl; ribs on the last 2 – 1 + 3 / 4 whorls disappearing, completely absent or reduced to faint growth lines, but reappearing just behind the thickened lip (very fine and somewhat distorted by dorsal grooves). Spiral sculpture hardly deveoloped on teleoconch, absent throughout whorls, or very weakly developed only only on the apical 2.5 whorls of teleoconch, very weak and fine when present, sinuous in high magnification, always absent on the last 2.5 whorls. Dorsal grooves developed on the last 3 / 4 whorls, axial, 4–5, moderately impressed, widely spaced, arising at a short distance below the suture, disappearing at the base above the cirum-columellar fold: interspace between the axial grooves wide, well convex. Base convex, with a prominent circum-columellar fold; circum-columellar fold developed on the last 7 / 8 whorls, delimitted by a prominent subspiral groove, initially developed along the columellar side of the thickened lip and almost radially straight in umbilical view, then winding around the columella just behind the thickened lip, with a series of fine and short growth wrinkles around the columella. Umbilicus closed in adult. Aperture hardly protruded, slightly tilted downward against the coiling axis in left lateral view; columellar axis within aperture somewhat tilted outward in front view. Columellar tooth rather strongly developed, emerged at the aperture, but never extended onto the inner peristome, deeply extended inward about 3 / 4 whorls. Parietal tooth absent within the aperture. Peristome single. Outer peristome undeveloped. Inner peristome subcircular of squarish circular, moderately expanded in all around; parietal margin located near or below the middle level of the upper body whorl. Thickened lip strongly developed behind the aperture, wide, expanded beyond the inner peristome in front view, white, lacking of periostracum, with fine growth lines on its outer surface, gradually narrowed toward the aperture (in particulr, at the palatal and basal sides), slightly constricted just behind the inner peristome; dorsal margin rather distinct, abruptly expanded from the preceding whorl at the palatal side; uppermost margin (= suture) ascending onto the penultimate whorl toward the aperture in left lateral view; base also ascending toward the aperture in left lateral view; palatal margin protruded beyond the penultimate whorl in apical view. Dimensions. Shell height 2.6–2.7 mm, shell diameter 1.8–1.9 mm, suture width 1.6 mm, peristome height 1.0 mm. Operculum. Not examined. Penis. Not examined. Radula. Not examined. Distribution and ecology. Endemic to Palau: Known only from the type locality of Ngermalk island. The species inhabits limestone rocks. Remarks. H. globosa is most similar to H. lutea hemilaevis Yamazaki & Ueshima, 2015 in having smooth penultimate whorl without axial ribs, but differs from the latter by the more spherical shell shape, the presence of axial dorsal grooves on the last 3 / 4 whorls, the absence of axial ribs above the aperture, and the dorsal margin of the thickened lip being abruptly expanded from the preceding whorl (Figs. 12 A, B). H. globosa is also similar to H. crassilabris crassilabris (Crosse, 1866), but distinguished from the latter in the following points: the shell shape is more spherical; the axial ribs are almost absent on the last 2 whorls; parietal tooth is never developed within the aperture; the dorsal grooves are not so deeply impressed, but occur in higher number (4–5); the spiral sculpture is absent on the lower whorls (Figs. 12 A, C).Published as part of Yamazaki, Midori, Yamazaki, Kazunori, Rundell, J. & Ueshima, Rei, 2015, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia, pp. 511-538 in Zootaxa 4057 (4) on pages 534-536, DOI: 10.11646/zootaxa.4057.4.3, http://zenodo.org/record/24168
Hungerfordia chilorhytis M. Yamazaki and Ueshima, sp. nov.
No full textHungerfordia chilorhytis M. Yamazaki and Ueshima sp. nov. (Figs. 10, 12E) Material examined. Holotype . Belual a kelat, a northern islet of Ngemelis islands (Loc. Gm 7 - 1), Palau. Collected by R. U. and M. Y. on Jan. 28, 2010. UMUTZ-MG-B0944T. Paratypes. Ngemelis : same data as holotype, 28 specimens, UMUTZ-MG-B0944. Diagnosis. Shell sinistral, small for Hungerfordia species, slender conical or fusiform. Last 3 / 4 whorls characteristically sculptured by strong dorsal grooves. Shell color yellow. Axial ribs low, closely spaced on most whorls (higher than the last 3 / 4 whorls), irregularly spaced and partially indistinct on the last 3 / 4 whorls. Spiral sculpture present throughout teleoconch whorls. Dorsal grooves strongly developed on the last 3 / 4 whorls, axial (parallel to the axial ribs), 5–6, deeply impressed, widely spaced. Interspace between the axial grooves convex, somewhat protruded like “axial folds”, with 2–5 of ribs on its surface. Base convex, with a prominent circumcolumellar fold; circum-columellar fold strongly developed, almost radially straight in umbilical view. Outer peristome absent. Inner peristome somewhat distorted, obtusely angulate at the periphery, squarish circular, with a characteristic baso-palatal lip. Baso-palatal lip developed along the palatal and basal margin of the inner peristome, a ridge-like thickening, abtuptly truncated at a short distance before the columella (at the base), leaving a canal-like depression at the baso-columellar edge of the inner peristome. Columellar tooth moderately developed. Thickened lip developed behind the aperture, wide; dorsal margin distinct; palatal side abruptly expanded from the preceding whorl, then gradually narrowed toward the aperture in umbilical view. Endemic to an islet of Ngemelis islands. Description. Shell (Figs. 10 A–C, 12 E). Shell sinistral, thick, small for Hungerfordia species, slender conical or fusiform, penultimate whorl widest when excluding the thickened lip; sides almost straight or slightly concave on the upper whorls, convex on the last 2 whorls. Shell color yellow. Whorls 6–6.5, convex, broadest (in longitudinal width) on the penultimate or the last whorl in dorsal view: last 3 / 4 whorls characteristically sculptured, with strong axial dorsal grooves; last 1 / 8 whorls (including the thickened lip) expanded upward, ascending onto the penultimate whorl in left lateral view. Suture impressed. Constriction located above the parietal/columellar junction of the aperture, internally without palatal plica except a low, axial crest caused by the constriction, without FIGURE 10. Hungerfordia chilorhytis sp. nov. (A 1–8) A topotypic paratype, Loc. Gm 7 - 1, B0944a: (A 7) aperture, showing the developed baso-palatal lip of the inner peristome; (B 1–6) holotype, B0944T; (C) a topotypic paratype, B0944b; (D 1–2) outer surface, and (D 3–4) inner surface of operculum, a topotypic paratype, B0944c. Scale bars, 1mm (A 1–6, A 8, B, C), 0.5 mm (A 7, D). All specimens, UMUTZ-MG. parietal tooth. Tuba 7 / 8 whorls. Protoconch 1 – 1 + 1 / 8 whorls, almost smooth, very weakly and finely punctated on the lower part of whorl. Apical septum absent. Axial ribs present on teleoconch, almost straight (never folded at the peripheries of the whorls), oblique to the coiling axis: ribs on most whorls (higher than the last 3 / 4 whorls) distinct, closely spaced (13–22 ribs in a quarter whorl), low; ribs on the last 3 / 4 whorl irregularly spaced, partially indistinct. Dorsal grooves strongly developed on the last 3 / 4 whorls, axial (parallel to the axial ribs), deeply impressed, 5–6, widely spaced, arising at short distance below the suture, becoming weaker toward the columella, internally protruded as “axial folds” within the aperture. Interspace between the dorsal grooves convex, somewhat protruded like “axial dorsal folds”, wide, frequently edged along a rib in umbilical view, with 2–5 ribs on its surface, also with short and closely spaced growth lines or reduced ribs just below the suture. Spiral sculpture present on teleoconch, continued throughout whorls, but somewhat weakened on the last 3 / 4 whorls, fine, rather prominent, sinuous in high magnification. Base rather convex, with a prominent circum-columellar fold; circumcolumellar fold rather strongly developed on the last 3 / 4 whorls, almost radially straight in umbilical view, extended along the columellar side of the thickened lip, strongest and broadest just after the constriction, then gradually becoming weaker toward the columella. Umbilicus closed in adult. Aperture not protruded, slightly tilted downward against the coiling axis in left lateral view; columellar axis within aperture almost vertical. Columellar tooth moderately developed, emerged at the aperture, but never extended onto the inner peristome, deeply extended inward about 3 / 4 whorls. Peristome single. Outer peristome never developed at the dorsal margin of the thickened lip. Inner peristome characteristically shaped and sculptured, squarish circular, obtusely angulate at the periphery, moderately expanded at the parietal, columellar, and basal sides, depressed and less expanded at the upper palatal side (in front view), with a characteristic baso-palatal lip; parietal margin located below the middle level of the upper body whorl. Baso-palatal lip developed along the palatal and basal margin of the inner peristome, a ridgelike thickening which is continued from the angular edge to the base of the inner peristome, strongly developed at the base, but abtuptly truncated at a short distance before the columella (at the base), leaving a canal-like depression at the baso-columellar edge of the inner peristome (in umbilical view), with fine glanular sculptures on its surface. Thickened lip developed behind the aperture, rather wide in left lateral view, expanded beyond the inner peristome in front view, white, lacking of periostracum, with fine growth lines on its outer surface; palatal side slightly or hardly narrowed toward the aperture in umbilical view; dorsal margin distinct, abruptly expanded from the preceding whorl at the palatal side; uppermost margin (= suture) ascending onto the penultimate whorl toward the aperture in left lateral view; base extended almost horizontally or slightly ascending toward the aperture in left lateral view; palatal margin somewhat protruded beyond the penultimate whorl in apical view. Dimensions. Shell height 2.8–3.2 mm, shell diameter 1.7 –2.0 mm, suture width 1.4–1.6 mm, peristome height 0.9–1.1 mm. Operculum (Figs. 10 D 1–4). Operculum corneous, multispiral, circular, semi-transparent, amber-colored, thin, flat; outer surface smooth; inner surface with a low, C-letter shaped ridge at the columellar side. Penis. Penis absent. Distribution and ecology. Endemic to Palau: Belual a kelat, a northern islet of Ngemelis islands. The species inhabits limestone rocks. Remarks. H. chilorhytis is similar to H. crenata Yamazaki & Ueshima, 2015 in the sculpture and the ribbing pattern, but differs in the distinctly larger shell size and the presence of a baso-palatal lip inside the inner peristome (Figs. 12 D, E). Eymology. The species name derived from Latinized Greek, cheilos + rhytis, refers to the inner peristome with a characteristic baso-palatal lip.Published as part of Yamazaki, Midori, Yamazaki, Kazunori, Rundell, J. & Ueshima, Rei, 2015, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia, pp. 511-538 in Zootaxa 4057 (4) on pages 532-534, DOI: 10.11646/zootaxa.4057.4.3, http://zenodo.org/record/24168
Hungerfordia irregularis M. Yamazaki and Ueshima, sp. nov.
No full textHungerfordia irregularis M. Yamazaki and Ueshima sp. nov. (Figs. 9, 12F) Material examined. Holotype. A limestone outcrop, 1.5 km west of Oikull (Loc. BA 7 - 1), Airai State, Babeldaob island, Palau. Collected by R. U. and M. Y. on Feb. 1, 2010. UMUTZ-B 1093 T. Paratypes. Babeldaob : same data as the holotype, 15 specimens, UMUTZ-B 1093. Diagnosis. Shell sinistral, small for Hungerfordia species, slender conical. Shell color white or reddish brown. Axial ribs on most whorls strongly developed, shortly protruded and somewhat lamellar, irregularly spaced, with or without some riblets at the interspace; interstitial riblets frequently developed between the ribs, also irregularly spaced, variable in the degrees of height and strength; ribs above the aperture always closely spaced, low. Spiral sculpture present throughout teleoconch whorls. Base convex, with a weak circum-columellar fold. Columellar tooth moderately developed. Outer peristome weakly develped at the dorsal margin of the thickened lip or not. Thickened lip developed, rather wide. Description. Shell (Figs. 9 A–D, 12 F). Shell sinistral, thick, small for Hungerfordia species, slender conical, penultimate whorl widest when excluding the thickened lip; sides almost straight or slightly concave on the upper conical whorls, weakly convex on the last 2 whorls. Shell color white or reddish brown. Whorls 6.5–7, convex; last 3 / 4 whorls without dorsal groove, without dorsal fold; last 1 / 8 whorls (including the thickened lip) expanded upward, ascending onto the penultimate whorl in left lateral view. Suture impressed. Constriction located above the parietal/columellar junction of the aperture, associated with abrupt changes of the ribbing pattern, internally without palatal plica except a low and axial crest caused by the constriction, without parietal tooth. Tuba 7 / 8 whorls. Protoconch 1–1.25 whorls, almost smooth, weakly and finely punctated on the lower whorls. Apical septum absent. Axial ribs developed on teleoconch, distinct throughout whorls, almost straight (never folded at the peripheries of the whorls), oblique to the coiling axis; ribs on the first 1 / 4 whorls of the teleoconch absent; ribs on the following 1 / 3 – 1 / 4 whorls of initial teleoconch weak, closely spaced, very low; ribs on subsequent whorls (ribs on most whorls except above the aperture) strongly developed, distinctly (but shortly) protruded, somewhat lamellar, irregularly spaced, with or without some riblets at the interspace; interstitial riblets frequently developed between the ribs, also irregularly spaced, always somewhat lower (less protruded) than the ribs, variable in the degrees of height and strength (variable from highly protruded like the ribs to very weak and almost reduced to FIGURE 9. Hungerfordia irregularis sp. nov. (A 1–7) A topotypic paratype, Loc. BA 7 - 1, B 1093 a: (A 7) sculptures on the penultimate and the higher 2 whorls, showing the irregularly spaced axial ribs and riblets, note that the interstitial riblets are variable in the degrees of development; (B 1–5) holotype, B 1093 T; (C, D) topotypic paratypes, B0476b–c; (E 1–2) outer surface, and (E 3–4) inner surface of operculum, a topotypic paratype, B 1093. Scale bars, 1mm (A–D), 0.5 mm (E). All specimens, UMUTZ-MG. growth lines), occasionally undeveloped between some ribs; ribs above the aperture (ribs on the last 1 to last 3 / 4 whorls around the constriction) abruptly becoming closely spaced and low, never protruded. Spiral sculpture present on teleoconch, fine, prominent throughout whorls, sinuous in high magnification. Base rather convex, with a circum-columellar fold; circum-columellar fold weakly developed around the columella on the last 3 / 4 whorls, with a series of fine and short growth wrinkles in umbilical view. Umbilicus closed in adult. Aperture not protruded, tilted downward against the coiling axis in left lateral view; columellar axis within the aperture almost vertical. Columellar tooth moderately developed, emerging at the aperture, but never extended onto the inner peristome. Peristome single or double. Outer peristome weakly developed at the dorsal margin of the thickened lip or not. Inner peristome subcircular or squarish circular, moderately expanded, but less expanded at the upper palatal (=angular) side; parietal margin located below the middle level of the upper body whorl. Thickened lip developed behind the aperture, wide, expanded beyond the inner peristome at the upper palatal and columellar sides in front view, white, lacking of periostracum, with a series of fine growth lines on the outer surface, gradually narrowed toward the aperture in umbilical view; dorsal margin distinct, abruptly expanded from the preceding whorl; uppermost margin (=suture) ascending onto the penultimate whorl in left lateral view; base extended almost horizontally toward the aperture in left lateral view; palatal margin weakly protruded beyond the penultimate whorl in apical view. Dimensions. Shell height 2.8–3.2 mm, shell diameter 1.7 –2.0 mm, suture width 1.4–1.6 mm, peristome height 0.9–1.1 mm. Operculum (Figs. 9 E 1–4). Operculum corneous, multispiral, circular, semi-transparent, amber-colored, thin, flat; outer surface smooth; inner surface with a low, thin, arcuate ridge near the columellar margin. Penis. Penis absent. Radula. Not examined. Distribution and ecology. Endemic to Palau: Known only from a limestone outcrop near Oikull, Babeldaob island. The species inhabits limestone rocks. Remarks. H. irregularis is distinguished from other low-ribbed Hungerfordia species by having irregularly spaced ribs and riblets, the slender shell shape, and the absence of dorsal fold and groove on the last 3 / 4 whorls. Etymology. The specific name, derived from Latin irregularis, refers to the irregularly spaced ribs and riblets.Published as part of Yamazaki, Midori, Yamazaki, Kazunori, Rundell, J. & Ueshima, Rei, 2015, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia, pp. 511-538 in Zootaxa 4057 (4) on pages 530-532, DOI: 10.11646/zootaxa.4057.4.3, http://zenodo.org/record/24168
Hungerfordia nodulosa M. Yamazaki and Ueshima, sp. nov.
No full textHungerfordia nodulosa M. Yamazaki and Ueshima sp. nov. (Figs. 8, 12K 1–2) Materials examined. Holotype. Southern coast of western part of Bkulschuul island (Loc. Uo 8 - 2), Ulong islands, Palau. Collected by R. U. and M. Y. on Feb. 25, 2011. UMUTZ-MG-B 1149 T. Paratypes. Ulong: Loc. Uo 7 -1, 6 specimens, 27 /I/ 2010, UMUTZ-MG-B0934; Loc. Uo 8 -2, 11 specimens, 25 /II/ 2011, UMUTZ-MG-B 1149; Loc. Uo 8 -4, 22 specimens, 27 /II/ 2011, UMUTZ-MG-B 1226. Diagnosis. Shell sinistral, large for Hungerfordia species, conical. Shell color usually yellow on upper whorls, whitish on the last whorl, with two brown bands behind the aperture: upper band extended below the suture; lower band winding around the columella. Axial ribs developed on teleoconch; ribs on upper whorls (higher than the last whorls) strong, very widely spaced, weakly folded and shortly protruded at the peripheries of the whorls, elevated by axial protrusions of shell wall (along the ribs); ribs above the aperture closely spaced, low; ribs on the last 3 / 4 whorls strong, widely spaced, folded, partially and strongly elevated by axial protrusions of shell wall only at the peripheries of the whorls, with nodular swellings. Interspace between the widely spaced ribs with some closely spaced growth wrinkles below the suture. Aperture rather large; columellar axis within the aperture slightly oblique. Columellar tooth present, moderately developed. Peristome double. Outer peristome strongly developed, widely expanded beyond the inner peristome. Inner peristome squarish circular. Thickened lip developed behind the aperture, moderately wide; dorsal margin distinct, abruptly expanded from the preceding whorl as the outer peristome. FIGURE 8. Hungerfordia nodulosa sp. nov. (A 1–10) A topotypic paratype, Loc. Uo 8 - 2, B 1149 a: (A 10) sculpture on the penultimate whorl; (B 1–6) holotype, B 1149 T; (C) brownish color variant, a paratype from Loc. Uo 8 - 4, B 1226; (D 1–2) outer surface, and (D 3–4) inner surface of operculum, a topotypic paratype, B 1149. Scale bars, 1mm. All specimens, UMUTZ-MG. Description. Shell (Figs. 8 A–C, 12 K 1–2). Shell sinistral, thick, large for Hungerfordia species, conical, last whorl widest or last 2 whorls almost equally widest when excluding the thickened lip and peristomes; sides almost straight. Shell color usually yellow (occasionally reddish brown) on most whorls (higher than the last whorl), whitish on the last whorls, with two vague brown bands behind the aperture: upper band developed below the suture behind the outer peristome, becoming broader toward the aperture; lower band winding around the columella on the last 5 / 8 whorls, longer than the upper band. Whorls 5–6, slightly convex, but seemingly angulate at the peripheries of widely spaced ribs due to axial protrusions of the shell wall along the obliqued ribs, broadest (in longitudinal width) on the penultimate or the last whorl in dorsal view; last 3 / 4 whorls with characteristic nodular swellings along the ribs; last 1 / 8 whorls (including the thickened lip) expanded upward, ascending onto the penultimate whorl in left lateral view; last 1 / 4 whorls behind the outer peristome somewhat dorso-ventrally depressed at the base. Suture impressed; suture of a part of the last whorl occasionaly running slightly inside the angulate base (=basal keel) of the penultimate whorl. Constriction located above the parietal/collumellar junction of the aperture, internally without palatal plica except a low and axial crest caused by the constriction, associated with abrupt changes of the ribbing pattern. Tuba 7 / 8 whorls. Protoconch 3 / 4 – 1 + 1 / 4 whorls, almost smooth, very weakly and very finely punctated on the lower whorl. Apical septum absent. Axial ribs strongly developed on teleoconch, distinct throughout whorls, oblique to the coiling axis: ribs on first 1 / 3 – 1 / 2 whorls of teleoconch weak, closely spaced, very low, almost straight; ribs on the following 1 / 4 – 1 / 3 whorls of initial teleoconch gradually becoming stronger and more widely spaced; ribs on the subsequent whorls except the last whorl (ribs on the penultimate and the higher 2.5–3 whorls) strongly developed, very widely spaced (7–11 ribs in a whorl), elevated by axial protrusions of shell wall along the ribs, weakly folded and slightly protruded at the peripheries of the whorls, sharply edged, but never pointed at the shoulder, gradually becoming more closely spaced and less folded on the last 1 + 1 / 4 to last 1 whorls; ribs above the aperture (ribs on the last 1 + 1 / 8 to last 3 / 4 whorls around the constriction) closely spaced, low (but distinct), almost straight (not folded at the peripheries of the whorls); ribs on the last 3 / 4 whorls strongly developed, abruptly becoming very widely spaced again, folded and slightly protruded at the peripheries of the whorls, partially and characteristically elevated by axial protrusions of shell wall along the ribs, strongly elevated only along the central and folded part of the ribs (elevated only at the peripheries of the whorls), associated with nodular swellings, never elevated at the upper margin (between the suture and the periphery) and the lower (basal) margin (between the periphery and the columella). Interspace between the widely spaced ribs with interstitial growth wrinkles below and above the suture: upper growth wrinkles always developed below the suture on most whorls, closely spaced, moderately long, disappearing near the peripheries of the whorls; lower growth wrinkles occasionally present on the last 1 + 1 / 8 to last 1 + 1 / 4 – 2 whorls, weakly developed just above the suture of the next whorl, very short, much shorter than the upper wrinkles, closely spaced, occasionally and partially connected with the upper wrinkles by weak growth lines. Spiral sculpture present throughout teleoconch whorls, fine, prominent on the upper whorls, somewhat weakened on the last 3 / 4 whorls, sinuous in high magnification. Basal keel absent on the last whorl, but present on the penultimate and the higher few whorls, a trace of angulate base in younger stages, hardly visible in adult shell, but occasionally visible just above the suture of the last whorl in oblique umbilical view, narrow, associated with a very weak spiral depression. Axial protrusions of the shell wall (along the ribs) on the last 3 / 4 whorls characteristically developed, strongly developed only at the periphery of the whorls (developed only along the central and the folded parts of the ribs), never developed at the base and below the suture, with nodular swellings; abapertural side almost flat or faintly concave in oblique umbilical view, but seemingly convex in mid-umbilical view due to the obliqued axial ribs; adapertural side prominently convex, almost equally wide as the abapertural side in umbilical view. Base smooth except around the columella, convex on the last 1 to last 2 / 3 whorls, somewhat dorso-ventrally depressed on the last 1 / 4 whorls behind the outer peristome, with a weak circum-columellar fold; circum-columellar fold very weakly develped on the last 3 / 4 whorls around the columella, with fine and weak growth lines on its surface, expanded beyond the inner peristome at the columellar side in front view. Umbilicus closed in adult. Aperture rather large, not protruded, slightly tilted downward against the coiling axis in left lateral view; columellar axis within aperture rather oblique (tilted outward) against the coiling axis in front view. Columellar tooth present, moderately developed, emerged at the aperture, but never extended onto the inner peristome, deeply extended inward about 3 / 4 whorls. Peristome double. Outer pesitome strongly developed at the dorsal margin of the thickened lip, expanded beyond the inner peristome in front view; inner surface with fine and concentric growth lines; outer surface with fine spiral sculptures. Inner peristome squarish circular, moderately expanded, but less expanded at the upper palatal side, slightly expanded beyond the thickened lip at the basal side (in left lateral view), strongly protruded from the outer peristome; parietal margin located below the middle level of the upper body whorl. Thickened lip developed behind the aperture, moderately wide, with very fine growth lines on its outer surface, white, lacking of periostracum, almost cylidrically extended in umbilical view; dorsal margin distinct, abruptly expanded from the preceding whorl, with a developed outer peristome; upper most margin (= suture) ascending onto the penultimate whorl toward the aperture in left lateral view; base extended almost horizontally toward the aperture in left lateral view; palatal margin protruded beyond the penultimate whorl in apical view. Dimensions. Shell height 5.3–6.2 mm, shell diameter 3.2–3.7mm, suture width 2.5–2.7 mm, peristome height 1.9–2.4 mm. Operculum (Figs. 8 D 1–4). Operculum corneous, multispiral, circular, semi-transparent, amber-colored, thin, flat; outer surface smooth; inner surface with a very low, arcuate ridge near the columellar margin. Penis. Penis absent. Radula. Not examined. Distribution and ecology. Endemic to Palau: Ulong islands. The species inhabits limestone rocks. Remarks. H. nodulosa is similar to H. ringens (Crosse, 1866), but differs in the following ways: the axial ribs on the last 3 / 4 whorls are widely spaced, prominently folded and protruded at the peripheries of the whorls, and with characteristic nodular swellings; lateral fold, dorsal fold, and dorsal groove never developed on last 3 / 4 whorls; the axial ribs are also widely spaced at the dorsal side of the penultimate whorl (Figs. 12 I, K). H. nodulosa is also similar to H. spinoscapula Yamazaki & Ueshima, 2015, which coexists with the species in sympatry. H. nodulosa, however, differs from H. spinoscapula by the axial ribs being never sharply pointed at the shoulder, the strongly developed outer peristome, the absence of lateral fold and dorsal fold on the last 3 / 4 whorls, and the larger and broader shell in the sympatric populations (Figs. 12 J, K). Although most specimens of H. nodulosa are readily distinguished from H. robiginosa Yamazaki & Ueshima, 2015 by the yellow shell color, the brownish color variant of the species is very similar to H. robiginosa (Figs. 12 K 2, L). Brownish variant of H. nodulosa, however, differs from H. robiginosa by the following features: the axial ribs on the last 3 / 4 whorls are distinctly elevated at the peripheries of the whorls, associated with characteristic nodular swellings; the axial ribs on the penultimate and the higher 2 whorls are more widely spaced; the outer peristome is widely expanded beyond the inner peristome. Etymology. The specific name, derived from Latin nodulosus, refers to the characteristic nodular swellings on the last 3 / 4 whorls.Published as part of Yamazaki, Midori, Yamazaki, Kazunori, Rundell, J. & Ueshima, Rei, 2015, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (3) Description of eight new species and two new subspecies of Hungerfordia, pp. 511-538 in Zootaxa 4057 (4) on pages 527-530, DOI: 10.11646/zootaxa.4057.4.3, http://zenodo.org/record/24168
Hungerfordia expansilabris K. Yamazaki and Ueshima 2013, sp. nov.
No full text<i>Hungerfordia expansilabris</i> K. Yamazaki and Ueshima sp. nov. <p>(Figs. 9C, 14, 29B)</p> <p> <b>Material examined.</b> <b> <i>Holotype</i>.</b> East of Pkulaklim islet (Loc. BA 5-5), Airai state, Babeldaob island, Palau. Collected by R. U. and K. Y. on Nov. 12, 2006. UMUTZ-MG-B0480 T. <b> <i>Paratypes</i>. Babeldaob:</b> Loc. BA 6-1, 13 specimens, 21/X/2007, UMUTZ-MG-B0667; Loc. BA 8-3, 6 specimens, 1/III/2011, UMUTZ-MG-B1309; Loc. BA 8-4, 3 specimens, 1/III/2011, UMUTZ-MG-B1322. <b>Pkulaklim islet:</b> Loc. BA 5-4, 1 specimen, 12/XI/2006, UMUTZ-MG-B0472; Loc. BA 5-5, 6 specimens, 12/XI/2006, UMUTZ-MG-B0480; ditto, 58 specimens, 1/III/ 2011, UMUTZ-MG-B1299; Loc. BA 6-2, 21 specimens, 21/X/2007, UMUTZ-MG-B0672.</p> <p> <b>Diagnosis.</b> Shell sinistral, medium-size for <i>Hungerfordia</i> species, slender conical. Shell color white or yellow. Constriction located above the aperture, followed by an abrupt swelling of whorl, associated with abrupt reduction of the spiny ribs. Axial ribs on most whorls highly protruded as spines, strongly folded at the periphery, widely spaced; upper margin of the ribs above the spiny projections (between the suture and spines) low, indistinct; spiny projections of the ribs very high, rather narrow, arising at some distance below the suture, folded at the periphery; ribs above the aperture very low and closely spaced, almost hidden by the expanded inner peristome. Spiral sculptures fine. Axial protrusions of shell wall (along the ribs) strongly developed on the last 3/4 whorls. Aperture strongly protruded, hardly tilted. Columellar tooth absent. Peristome usually double, very widely and extremely expanded, thin, fragile; outer peristome very widely expanded beyond the inner one at the palatal and basal sides, with rounded upper-palatal and baso-columellar edges, columellar margin strongly folded backward and covering the umbilicus; inner peristome very widely expanded all around, circular, parietal margin expanded beyond the middle level of the upper body whorl. Interspace between the outer and inner peristomes wide, abruptly expanded towards the aperture, almost smooth on its outer surface.</p> <p> <b> Description. <i>Shell</i></b> (Figs. 14A–H, 29B). Shell sinistral, medium-size for <i>Hungerfordia</i> species, slender conical, last whorl widest when removing the expanded ribs and peristomes. Shell color semi-transparent, white or light yellow, apical whorls occasionally yellow with the color becoming deeper toward the apex. Whorls 6–7, slightly convex; last 1/8 whorls (including interspace between the outer and inner peristomes) expanded upward and ascending onto the penultimate whorl in left lateral view. Suture weakly impressed. Constriction located above the parietal/columellar junction of the aperture, followed by an abrupt swelling of whorl, associated with abrupt reduction of the spiny ribs, internally without palatal plicae except a low axial-crest caused by the constriction. Tuba 7/8 whorls. Protoconch 1.5–2 whorls, apical whorl smooth, lower whorl faintly punctated below the suture. Apical septum absent. Axial ribs developed on the teleoconch, oblique to the coiling axis, strongly protruded as spines on most whorls; ribs on the first 1/2 to 3/4 whorls of the teleoconch low, closely spaced, not folded, gradually becoming higher and widely spaced; ribs on the subsequent whorls (except above the aperture) highly protruded as spines, strongly folded at the periphery, widely spaced (10–12 ribs in a whorl), <i>not</i> synchronized with those on the previous whorls; upper margin of the ribs above the spiny projection (between the suture and spines) low, indistinct or faintly elevated; spiny projections of the ribs very high, weakly pointed, narrow, arising at some distance below the suture (arising near periphery of a whorl), folded at the periphery, trough-shaped, protruded slightly upward or laterally on upper whorls, becoming to protruded rather downward on the last half whorl, upper margin weakly folded over the lower margin, lower margin extended below to the suture of the next whorl, with fine spiral sculptures on the outer surface; ribs above the aperture (ribs on the last 1 to the last 3/4 whorls around the constriction) abruptly becoming closely spaced and very low, without spiny projections, gradually becoming less folded at the periphery, almost hidden by the expanded inner peristome. Interspace between the spiny ribs without prominent axial sculpture on upper whorls, with coarse growth wrinkles below the suture on the last 3/4 whorls. Spiral sculptures present throughout the teleoconch, fine, rather prominent, expanded on the outer surface of the spiny ribs and outer peristome, sinuous in high magnification. Base convex, without basal keel. Umbilicus closed in adult by columellar reflection of the outer peristome not by narrowing of umbilical area. Axial protrusions of shell wall (along the ribs) very strongly developed on the last 3/4 whorls, hidden by the spiny ribs, strongest just after the constriction, becoming weaker toward the aperture, with rather deep axial depressions between them, adapertural side steep, abapertural side strongly convex and much wider than the adapertural one in umbilical view. Aperture hardly tilted against the coiling axis, strongly protruded; columellar axis within the aperture almost vertical. Columellar tooth usually absent, occasionally appeared as a faint columellar swelling. Peristome usually double, rarely triple with doubled inner peristome, very widely and extremely expanded; outer peristome thin, fragile, very widely expanded beyond the inner one at the palatal and basal sides, abruptly narrowed towards angular and columellar side to form rounded upper-palatal and baso-columellar edges, reflected backward, columellar margin strongly folded backward and covering the umbilicus, smooth and polished on the inner surface; inner peristome strongly protruded from the outer one, extremely widely expanded all around, especially on columellar and parietal sides, thin, very fragile, circular, parietal margin frequently expanded beyond the middle level of the upper body whorl; distal inner peristome usually undeveloped, weak and narrower than the proximal one when present. Interspace between the outer and inner peristomes wide, strongly expanded towards the aperture, outer surface almost smooth; uppermost margin continuously ascending toward the aperture in left lateral view, frequently with a series of very short growth wrinkles; base extended almost horizontally and then abruptly expanded toward the aperture in left lateral view.</p> <p> <b> <i>Dimensions</i>.</b> Shell height 4.7–5.3 mm, diameter 3.2–3.8 mm, suture width 1.5–2.1 mm, peristome height 2.1– 2.6 mm.</p> <p> <i>Operculum</i> (Figs. 14I 1 –I 4). Operculum corneous, multispiral, circular, thin, amber colored, transparent, flat or weakly concave; outer surface smooth; inner surface with a low, C-letter shaped, arcuate ridge near the columellar margin.</p> <p> <b> <i>Penis</i>.</b> Penis absent.</p> <p> <i>Radula</i> (Figs. 9C). Radula of specialized type of taenioglossate; ribbon very long. Central tooth very large, with a very wide, large, and blunt central cusp, with a pair of small lateral cups, basal plate longitudinally elongated and strongly constricted at the base. Lateral teeth also large, with a large, very wide and blunt major cusp, with or without a vestigial inner cusp, without outer cusp, basal plate obliquely elongated. Inner marginal teeth shorter than the lateral teeth, elongated, with a large major cusp, with two slender inner cusps and a small outer cup. Outer marginal teeth with a large, wide and blunt major cusp, with two slender inner cusps, without outer cusp.</p> <p> <b>Distribution and Ecology.</b> Endemic to Palau: Babeldaob island (southern coastal limestone area) and its satellite islet, Pkulaklim. The species inhabits vertical walls of large limestone rocks or cliffs, occasionally on limestone rubbles.</p> <p> <b>Remarks.</b> <i>H. expansilabris</i> is most similar to <i>H. triplochilus</i>, but differs from the latter by the much wider and fragile peristomes, the absence of a columellar tooth, the smooth interspace between the outer and inner peristomes, the absence or poor development of the distal inner peristome, and the axial protrusions of shell wall on the last 3/4 whorls being strongly developed. <i>H. expansilabris</i> is also distinguished from a sympatric congener, <i>H. echinata</i>, by having more widely spaced ribs, more slender spire, much wider and fragile peristomes, and the absence of a columellar tooth.</p> <p> <b>Etymology.</b> The specific name, derived from Latin <i>expansus</i> (= expanded) and <i>labrum</i> (= lip), refers to the very widely expanded inner peristome.</p>Published as part of <i>YAMAZAKI, KAZUNORI, YAMAZAKI, MIDORI & UESHIMA, REI, 2013, </i><p><i> <strong> Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (1) Generic classification and revision of <em> Hungerfordia <br> <strong> species with highly developed axial ribs , pp. 1-71 in Zootaxa 3743 (1)</strong></em></strong></i><strong><em><strong> on pages 27-28, DOI: 10.11646/zootaxa.3743.1.1, <a href="http://zenodo.org/record/5271036">http://zenodo.org/record/5271036</a></strong></em></strong></p>
Hungerfordia goniobasis subsp. dmasechensis K. Yamazaki and Ueshima 2013, subsp. nov.
No full textHungerfordia goniobasis dmasechensis K. Yamazaki and Ueshima subsp. nov. (Figs. 9I, 20, 29L) Materials examined. Holotype. Dmasech islet of Ngemelis islands (Loc. Gm5-2), Palau. Collected by R. U. and K. Y. on Nov. 16, 2006. UMUTZ-MG-B0579 T. Paratypes. Ngemelis: Loc. Gm5-2, 23 specimens, 16/XI/2006, UMUTZ-MG-B0579; ditto, 21 specimens, 24/X/2007, UMUTZ-MG-B0796. Diagnosis. Shell generally similar to H. goniobasis goniobasis, but differs by the following features. Axial ribs more closely spaced than the nominal subspecies. Interspace between the axial ribs with characteristic growth wrinkles; growth wrinkles developed below the suture, coarse, distnctly flared. Aperture larger than the nominal subspecies; parietal margin of the inner peristome attaching to (not separated downward from) the base of the upper body whorl. Distribution endemic to Dmasech islet of Ngemelis islands. Description. Shell (Figs. 20A–H, 29L). Shell sinistral, small for Hungerfordia species, slender conical, last whorl widest when removing the protruded ribs. Shell color white or yellowish brown, apical whorls occasionally yellow with the color becoming deeper toward the apex. Whorls 7–7.5, regularly coiled (increasing regularly in both width and height), convex in apical whorls, obtusely angulate at periphery of the spiny ribs on lower whorls; last 1/8 whorls expanded downward, never ascending onto the penultimate whorl in left lateral view except a short upward extension of the outer peristome. Suture impressed. Constriction located above the parietal/columellar junction of the aperture, less prominent in external view, associated with a weak reduction of the spiny ribs, internally without palatal plica except a low axial-crest caused by the constriction. Tuba 7/8–3/4 whorls. Apical septum absent. Protoconch 1.25–1.5 whorl, punctated. Axial ribs developed on the teleoconch, oblique to the coiling axis, strongly developed as spines on most whorls; ribs undeveloped on the first 1/8–1/3 whorls of the teleoconch; ribs on the following 1/8 whorls of initial teleoconch low, closely spaced, not folded; ribs on the subsequent whorls highly protruded as spines, widely spaced (10–12 ribs in a whorl), not synchronized with those on the previous whorls, folded at the periphery; upper margin of the ribs above the spiny projection (between the periphery and spines) low, indistinct or slightly elevated; spiny projections of the ribs very high, weakly pointed, trough-shaped, slightly curved upward on the upper whorls, becoming gradually protruded laterally or rather downward on the last whorl, rather narrow, arising at some distance below the suture (near periphery of a whorl), upper margin folded over the lower margin, lower margin extended below to the suture of the next whorl, with fine spiral sculptures on the outer surface; ribs above the aperture (ribs on the last 1 to last 3/4 whorls around the constriction) more closely spaced than those on the preceding and following whorls, with slightly lower but still developed spiny projections. Interspace between the spiny ribs with characteristic growth wrinkles; growth wrinkles developed below the suture on the last 3–4 whorls, coarse, shortly but distinctly protruded, somewhat lamellar, white. Spiral sculptures present through the teleoconch, fine, prominent, extended on outer surface of the spiny ribs and outer peristome, sinuous in higher magnification. Base with a strong basal keel. Basal keel developed at the base of the last 3/4 whorls, strong, with a rather sharp edge, arising just after the constriction, continued to the outer peristome, with a series of fine growth lines at the columellar side. Umbilicus closed in adult. Axial protrusions of shell wall (along the ribs) developed on the last whorl. Aperture of usual size, tilted downward against the coiling axis, located below base of the upper body whorl, hardly protruded, recessed inside the outer peristome; columellar axis within aperture almost vertical. Columellar tooth present, weak but more developed than the nominal subspecies, low, visible within the aperture, located near the base of the columella. Peristome double: outer peristome tilted downward against the coiling axis, widely expanded beyond the inner one at the palatal and basal sides, extended latero-basally like a spatula in dorsal view, with a series of fine growth lines on the inner surface, with fine spiral sculptures on the outer surface; inner peristome squarish circular, hardly protruded from the outer one, weakly expanded at the lower palatal, basal and columellar sides, erected from the basal keel at the columellar side to form a narrow “pseudo-umbilicus”; parietal margin of inner peristome almost horizontal, never expanded onto the upper body whorl, located just below the base of the upper body whorl. Dimensions. Shell height 3.1–3.4 mm, diameter 2.0–2.3 mm, suture width 1.2–1.4 mm, peristome height 0.8– 0.9 mm. Operculum (Figs. 20I 1 –I 4). Operculum corneous, multispiral, circular, transparent, amber colored, thin, flat; outer surface smooth; inner surface with a low, weak, arcuate ridge near the columellar margin. Penis. Penis absent. Radula (Fig. 9I). Radula of specialized type of taenioglossate; ribbon very long. Central tooth very large with a very wide, large and blunt central cusp, with a pair of small lateral cusps; lateral teeth also large, with a very large major cusp, with a small inner cusp, without outer cusp; inner marginal teeth with a large major cusp, with two slender inner cusps, with a short outer cusp; outer marginal teeth with a large and blunt major cusp, two slender inner cusps, without outer cusp. Distribution and ecology. Endemic to Palau: Dmasech islet of Ngemelis islands. The subspecies inhabits vertical walls of large limestone rocks or limestone rubbles. Remarks. H. goniobasis dmasechensis differs from the nominal subspecies by the presence of coarse growth wrinkles below the suture between the spiny ribs, having a larger (normal sized) aperture, the parietal margin of the inner peristome being attached to base of the upper body whorl, the more closely spaced axial ribs, and the broader shell shape. The distribution of the subspecies is restricted to Dmasech islet. Etymology. Named after the type locality, Dmasech islet.Published as part of YAMAZAKI, KAZUNORI, YAMAZAKI, MIDORI & UESHIMA, REI, 2013, Systematic review of diplommatinid land snails (Caenogastropoda, Diplommatinidae) endemic to the Palau Islands. (1) Generic classification and revision of Hungerfordia species with highly developed axial ribs , pp. 1-71 in Zootaxa 3743 (1) on pages 42-44, DOI: 10.11646/zootaxa.3743.1.1, http://zenodo.org/record/527103
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