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Chersodromia gamoviensis Maeda, 2011, sp. nov.
No full text<i>Chersodromia gamoviensis</i> sp. nov. <p>(Figs. 6, 13, 20–26)</p> <p> <b>Diagnosis.</b> A small, brownish species measuring ca. 1.5 mm. Stylus long. Face wider than frons. Wings normally developed. Male terminalia: right surstylus reduced to small projection; right epandrial lamella conspicuously large; right cercus very small; left surstylus with simple, slender outermost lobe. Setae on head and thorax black. Vertical setae (2 pairs) present; posthumeral setae absent.</p> <p> <b>Description.</b> Holotype, male (Fig. 6). Body length 1.55 mm; head width 0.33 mm; wing length 1.51 mm. Head (Fig. 20) dark brown in ground-colour and greyish pollinose; palpus brown in ground-colour and greyish pollinose; proboscis brown, slightly shining; antenna brown; all setae and setulae on head black. Frons moderate in width; in frontal view face below antennal sockets wider than frons. Ocellar setae (2 pairs) moderate in length, as long as scape, pedicel and postpedicel combined. Vertical setae (2 pairs) longer than ocellar setae. In frontal view gena moderate in width, 1/5 as wide as maximum eye height. Occiput with setulae. Antenna (Fig. 21): postpedicel round and slightly higher than pedicel in lateral view, with setulae along anterior margin; extension of postpedicel present dorsoapically; stylus long. Palpus with long setulae.</p> <p>Thorax (Fig. 22) dark brown in ground-colour and greyish pollinose; all setae and setulae on thorax black. Vestiture on thorax: 1 setula on each proepisternum; 1 pair of postpronotal setae; no posthumeral setae; 3 pairs of notopleural setae; 1 pair of supra-alar setae; 1 pair of long, inflected postalar setae; 3 pairs of dorsocentral setae near median line (1 long pair near scutellum); some dorsocentral setulae in multiple rows; 1 pair of incomplete rows of acrostichal setulae; 1 pair of long, inflected apically scutellar setae; 1 pair of subapical scutellar setulae.</p> <p>Wing (Fig. 13) normally developed, clear, with pale brown veins. Basicosta with 2 black setae and some setulae; costa with many dark brown setulae along anterior margin, ending at connection with vein M1+2; subcosta absent; R1 meeting costa at midway of wing; radial sector moderate in length; CuA1 indistinctly connected to wing margin; anal vein reduced to pale, fold-like line. Calypter pale brown, minute. Halter pale brown, large.</p> <p>Legs brown, stout. All setae on legs black; setulae on legs brown to pale brown. Fore femur sparsely covered with setulae (setulae of anteroventral row long), with 1 anterior preapical seta, 1 anteroventral preapical seta, 1 posterior preapical seta and 1 posteroventral preapical seta. Fore tibia somewhat swollen in dorsal view, covered with setulae (especially dense on anterior surface), with 1 anteroventral preapical seta and 1 posteroventral preapical seta. Fore tibial gland indistinct. Mid femur sparsely covered with setulae, with 1 strong anterior preapical seta and 1 anteroventral preapical seta. Mid tibia covered with setulae, with anteroventral row of some small, black spinulae (preapical one long), 1 anterior preapical seta and 1 posteroventral preapical seta. Hind femur covered with setulae, with anteroventral row of ca. 10 setae, 1 anterior preapical seta and 1 posteroventral preapical seta. Hind tibia covered with setulae (especially dense in apical part of posteroventral surface), with 2 anteroventral setae, 1 anterior seta, 1 anterior preapical seta, 1 anterodorsal seta, 1 anterodorsal preapical seta and 1 dorsal seta. Fore, mid and hind tarsomeres covered with setulae.</p> <p>Preabdomen sparsely covered with pale brown setulae; tergites and sternites brown in ground-colour and sparsely greyish pollinose.</p> <p>Terminalia (Figs. 23–26). Right surstylus reduced to small projection (Figs. 23, 25), boundary line between it and right epandrial lamella obscure. Right epandrial lamella conspicuously large (see Fig. 6), with short setae (Figs. 23, 25). Left surstylus composed of several lobes; outermost lobe simple, slender (Fig. 24). Left cercus moderate in size, somewhat slender, with some setulae; right cercus very small, bearing some small setulae (Fig. 26).</p> <p>Female. Unknown.</p> <p> <b>Type material. HOLOTYPE</b> 3, labelled: Russian Far East, S. Primorye, Gamov Pen., Astaf’ev Bay (bare sands), 26.viii.2010, leg. T. Maeda (IBSS). <b>Paratype</b>: 1 3, Gamov Pen., Vityaz’ Bay, 23.viii.2010 (NIAES).</p> <p> <b>Etymology.</b> This species is named after the type locality, Gamov Peninsula.</p> <p> <b>Distribution.</b> Russian Far East: southern part of Primorsk Territory.</p> <p> <b>Remarks.</b> This species was found only on the shores facing the open sea. <i>Chersodromia gamoviensis</i> is a rarely collected species (only two males were collected in this survey) and very similar to <i>C</i>. <i>leleji</i> except in male terminalia. The terminalia of <i>C</i>. <i>gamoviensis</i> differs from <i>C</i>. <i>leleji</i> mainly in the size of the right epandrial lamella and the shape of the left surstylus. The right epandrial lamella is very large, and the outermost lobe of the left surstylus is slender in <i>C</i>. <i>gamoviensis</i>.</p>Published as part of <i>Maeda, Takuya, 2011, New species of Chersodromia from the Russian Far East (Diptera: Empidoidea: Hybotidae: Tachydromiinae), pp. 1-24 in Zootaxa 2979</i> on pages 3-8, DOI: <a href="http://zenodo.org/record/202911">10.5281/zenodo.202911</a>
Chersodromia stenopsis Maeda, 2011, sp. nov.
No full textChersodromia stenopsis sp. nov. (Figs. 10, 17, 50–56) Diagnosis. A small, greyish species measuring less than 1.5 mm. Face extremely narrow. Katepisternum dull. Wings normally developed. Male terminalia: right surstylus being pointed lobe; left surstylus with bifurcate outermost lobe; left cercus small. Setae on head and thorax dark brown, small (postalar setae conspicuously small); setulae on head and thorax whitish, small. Vertical setae (2 pairs) present; proepisternal setae/setulae, posthumeral setae and supra-alar setae absent. Description. Male (Fig. 10). Body length 1.19–1.34 mm; head width 0.32–0.35 mm; wing length 1.45–1.60 mm. Head (Fig. 50) grey in ground-colour and whitish pollinose; palpus whitish pollinose; proboscis pale brown, slightly shining; antenna brown; all setae on head dark brown; all setulae on head whitish with brown tinge. Frons moderate in width; in frontal view face extremely narrow, narrower than median ocellus. Ocellar setae (2 pairs) and vertical setae (2 pairs) short, as long as scape and pedicel combined. In frontal view gena narrow, 1 / 7 as wide as maximum eye height. Occiput with setulae. Antenna (Fig. 51): postpedicel round in lateral view, bearing setulae along anterior margin; extension of postpedicel present dorsoapically; stylus moderate in length, ca. 2 times as long as pedicel and postpedicel combined. Palpus with some setulae and sensory pit, but it hardly visible without preparation on slide. Thorax (Fig. 52) grey in ground-colour and whitish pollinose; no polished area on katepisternum; all setae brown; all setulae whitish with brown tinge. Vestiture on thorax: proepisternal seta/setula absent; 1 pair of long postpronotal setae; no posthumeral setae; 2 pairs of notopleural setae; no supra-alar setae (1 or 2 pairs of supra-alar setulae present); 1 pair of small postalar setae; some dorsocentral setulae in multiple rows; 1 pair of incomplete rows of some acrostichal setulae; 1 pair of long apically scutellar setae; 1 pair of tiny subapical scutellar setulae. Wing (Fig. 17) normally developed, clear with grey tinge; veins pale brown. Basicosta with 1 dark brown seta; costa with pale brown setulae along anterior margin, ending at connection with vein M 1 + 2; subcosta absent; R 1 meeting costa before midway of wing; radial sector moderate in length; CuA 1 indistinctly connected to wing margin; anal vein reduced to pale, fold-like line. Calypter minute, whitish with brown tinge. Halter pale brown, large. Legs pale brown, somewhat slender. Setae on legs brown/pale brown; all setulae on legs whitish with brown tinge. Fore femur sparsely covered with setulae (setulae of anteroventral and posteroventral rows long), with 1 short anterior preapical seta and 1 posterior preapical seta. Fore tibia covered with setulae, with 1 anteroventral preapical seta and 1 posteroventral preapical seta. Fore tibial gland indistinct. Mid femur covered with setulae, with 1 anterior preapical seta, 1 anteroventral preapical seta, 1 posterior prearical seta and 1 posteroventral preapical seta. Mid tibia slightly inflexed, covered with setulae, with anteroventral row of 13–16 short, brown spinulae (apical one longest), 1 anterior preapical seta, 1 posterior preapical seta, 1 posteroventral preapical seta and 2 anterodorsal setae. Hind femur covered with setulae (setulae of posteroventral row relatively long), with 1 anteroventral preapical seta. Hind tibia covered with setulae, with 2 dorsal setae, 1 anterodorsal preapical seta, 1 anterodorsal seta, 1 anterior preapical seta, 2 anterior setae and 2 anteroventral setae. Fore, mid and hind tarsomeres covered with setulae. Preabdomen sparsely covered with whitish setulae; tergites and sternites brown in ground-colour and sparsely whitish pollinose; membrane pale brown in ground-colour and sparsely whitish pollinose. Tergites 1–7 each with 1 or 2 brown plaques laterally and 1 pair of small pits dorsolaterally. Eighth segment hidden. Terminalia (Figs. 53–56). Coloration: right surstylus generally brown, partially shiny black; right epandrial lamella brown in ground-colour and sparsely whitish pollinose; cerci brown; left surstylus, left epandrial lamella and hypandrium shiny dark brown. Right surstylus being pointed lobe (Figs. 53, 55), boundary line between it and right epandrial lamella obscure. Right epandrial lamella with brown setulae (Fig. 53), with small setulae in dorsoapical part, which somewhat flattened (Fig. 55). Left surstylus composed of several lobes; outermost lobe large, bifurcate (Fig. 54). Right and left cerci weakly sclerotized, small (lengths of right and left cerci almost same), apically with some setulae (Fig. 56). Female. Body length 1.37–1.39 mm; head width 0.34–0.35 mm; wing length 1.54–1.65 mm. Closely resembling males except in structure of mid tibia and terminalia. Mid tibia not inflexed, without anteroventral row of spinulae. Cercus brown. Type material. HOLOTYPE 3, labelled: Russian Far East, S. Primorye, Gamov Pen., Vityaz’ Bay, 24.viii. 2010, leg. T. Maeda (IBSS). Paratypes: 10 3, 13 Ƥ (dried specimens), same data as holotype; 10 3, 9 Ƥ, same loc., 23.viii. 2010. Other specimens examined (in alc.): 35 3, 60 Ƥ, Amur Bay, 3–5 km E. Tavrichanka, 22.viii. 2010; 2 Ƥ, Zarubino, 25.viii. 2010; 4 3, 4 Ƥ, Gamov Pen., Astaf’ev Bay (scrub zone), 26.viii. 2010; 30 3, 34 Ƥ, Gamov Pen., Telyakovskiy Bay, 24.viii. 2010; 5 3, 2 Ƥ, Pos’et, 25.viii. 2010; 17 3, 20 Ƥ, Nazimov Cape, 28.viii. 2010. Type depository. Some paratypes are in FMNH, IBSS, NIAES, USNM, OUMNH and TMC. Etymology. The specific epithet “ stenopsis ” is Latin meaning “narrow face”. Distribution. Russian Far East: southern part of Primorsk Territory. Remarks. This species was found on different kinds of seashores, but appears generally to prefer habitats in the upper littoral zone on shores with abundant washed up debris, comprising mainly seaweeds. However, on the shore of Astaf’ev Bay (Fig. 3) it was very rare and only found in the scrub zone probably because C. nubifera occupied washed up debris. It is very easy to distinguish C. stenopsis from the other species in the Russian Far East by its very narrow face.Published as part of Maeda, Takuya, 2011, New species of Chersodromia from the Russian Far East (Diptera: Empidoidea: Hybotidae: Tachydromiinae), pp. 1-24 in Zootaxa 2979 on pages 17-20, DOI: 10.5281/zenodo.20291
Chersodromia leleji Maeda, 2011, sp. nov.
No full textChersodromia leleji sp. nov. (Figs. 7, 14, 27–33) Diagnosis. A small, brownish species measuring less than 1.5 mm. Stylus long. Face wider than frons. Katepisternum largely polished. Wings normally developed. Male terminalia: right surstylus reduced to small, pointed projection; right epandrial lamella with setulae along dorsoapical margin; right cercus very small; left surstylus with large, flattened, round outermost lobe. Setae on head and thorax black. Vertical setae (2 pairs) present. Description. Male (Fig. 7). Body length 1.10–1.27 mm; head width 0.29–0.32 mm; wing length 1.44–1.70 mm. Head (Fig. 27) dark brown in ground-colour and greyish pollinose; palpus brown in ground-colour and greyish pollinose; proboscis brown, slightly shining; antenna brown; all setae and setulae on head black. Frons moderate in width; in frontal view face below antennal sockets wider than frons. Ocellar setae (2 pairs) moderate in length, as long as scape, pedicel and postpedicel combined. Vertical setae (2 pairs) longer than ocellar setae. In frontal view gena moderate in width, 1 / 5.5 as wide as maximum eye height. Occiput with setulae. Antenna (Fig. 28): postpedicel round and slightly lower than pedicel in lateral view, with setulae along anterior margin; extension of postpedicel present dorsoapically; stylus long, ca. 2.5 times as long as pedicel and postpedicel combined. Palpus with long setulae; sensory pit obscure even with preparation on slide. Thorax (Fig. 29) dark brown in ground-colour and greyish pollinose; katepisternum largely polished; all setae and setulae on thorax black. Vestiture on thorax: 1 long setula on each proepisternum; 1 pair of long, inflected postpronotal setae; 1 pair of posthumeral setae (sometimes absent); 3–4 pairs of notopleural setae (2 pairs long); 1 pair of supra-alar setae; 1 pair of long, inflected postalar setae; 3–4 pairs of dorsocentral setae near median line (1 long pair near scutellum); some dorsocentral setulae in multiple rows; 1 pair of incomplete rows of acrostichal setulae; 1 pair of long, inflected apically scutellar setae; 1 pair of subapical scutellar setulae. Wing (Fig. 14) normally developed, clear, with pale brown veins. Basicosta with 1 black seta and some setulae; costa with many dark brown setulae along anterior margin, ending at connection with vein M 1 + 2; subcosta absent; R 1 meeting costa at midway of wing; radial sector moderate in length; CuA 1 indistinctly connected to wing margin; anal vein reduced to pale, fold-like line. Calypter pale brown, minute. Halter pale brown, large. Legs pale brown, stout. All setae on legs black; setulae on legs brown to pale brown. Fore femur sparsely covered with setulae (setulae of anteroventral and posteroventral rows long; some preapical setulae strong; 2 subbasal setulae long), with 1 anterior preapical seta, 1 posterior preapical seta and 1 anteroventral preapical seta. Fore tibia somewhat swollen in dorsal view, covered with setulae (especially dense on anterior surface), with 1 anteroventral preapical seta, 1 posteroventral preapical seta and 1 strong anterior setula in basal part. Fore tibial gland indistinct. Mid femur sparsely covered with setulae, with anteroventral row of ca. 10 setae, 1 anteroventral preapical seta, 1 anterior preapical seta, posteroventral row of ca. 10 setae, 1 posteroventral preapical seta and 1 posterior preapical seta. Mid tibia covered with setulae, with anteroventral row of 15–20 small, black spinulae (preapical one long), 1 anterior preapical seta and 1 posteroventral preapical seta. Hind femur covered with setulae (some posterior preapical setulae strong), with anteroventral row of ca. 10 setae, 1 anterior preapical seta and 1 posteroventral preapical seta. Hind tibia covered with setulae (especially dense in apical part of posteroventral surface), with 2 anteroventral setae, 1 anterior seta, 1 anterior preapical seta, anterodorsal row of 3 setae and 1 dorsal seta. Fore, mid and hind tarsomeres covered with setulae. Preabdomen sparsely covered with pale brown setulae; tergites and sternites brown/dark brown in groundcolour and sparsely greyish pollinose. Tergite 7 with some long setae along posterior margin. Eighth segment hidden, with some setae along posterior margin. Terminalia (Figs. 30–33). Coloration: right surstylus (inner surface polished brown), right epandrial lamella and cerci dark brown in ground-colour and sparsely greyish pollinose; left surstylus, left epandrial lamella and hypandrium shiny pale brown. Right surstylus reduced to small, pointed projection (Fig. 30), with boundary line between it and right epandrial lamella obscure. Right epandrial lamella with short, black setae (Fig. 30) and whitish microtrichia over surface, with many small setulae in dorsoapical part, which forms weakly differentiated marginal zone (Figs. 30, 32). Left surstylus composed of several lobes; outermost lobe large, flattened and round (Fig. 31). Left cercus somewhat slender, with some setulae; right cercus very small, with some small setulae (Fig. 33). Female. Unknown. Type material. HOLOTYPE 3, labelled: Russian Far East, S. Primorye, Gamov Pen., Vityaz’ Bay, 24.viii. 2010, leg. T. Maeda (IBSS). Paratypes (dried specimens): 13 3, same data as holotype; 7 3, same loc., 23.viii. 2010. Other specimens examined (in alc.): 7 3, Amur Bay, 3–5 km E. Tavrichanka, 22.viii. 2010; 2 3, Zarubino, 25.viii. 2010; 38 3, Pos’et, 25.viii. 2010; 4 3, Andreevka, Risovaya Bay, 23.viii. 2010; 4 3, Gamov Pen., Astaf’ev Bay (bare sands), 26.viii. 2010; 10 3, Gamov Pen., Vityaz’ Bay, 23.viii. 2010; 44 3, Gamov Pen., Telyakovskiy Bay, 24.viii. 2010; 19 3, Nazimov Cape, 28.viii. 2010. Type depository. Two paratypes are deposited in IBSS; some paratypes are in FMNH, NIAES, USNM, OUMNH and TMC. Etymology. The specific epithet is dedicated to the hymenopterist, Dr. Arkady S. Lelej, of the Institute of Biology and Soil Science, Far Eastern Branch of Russian Academy of Science, Vladivostok, Russia. Distribution. Russian Far East: southern part of Primorsk Territory. Remarks. This species was collected on different seashore types in the southern part of Primorsk Territory. Chersodromia leleji closely resembles C. gamoviensis and is distinguished from the latter only in the structure of the male terminalia.Published as part of Maeda, Takuya, 2011, New species of Chersodromia from the Russian Far East (Diptera: Empidoidea: Hybotidae: Tachydromiinae), pp. 1-24 in Zootaxa 2979 on pages 8-11, DOI: 10.5281/zenodo.20291
Chersodromia yamanei Maeda, 2011, sp. nov.
No full textChersodromia yamanei sp. nov. (Figs. 11, 18, 57–63) Diagnosis. A small species measuring less than 1.5 mm, with narrow gena. Stylus relatively short. Katepisternum largely polished. Wings normally developed. Male terminalia: left cercus sclerotized, large and elongate; right cercus sclerotized, small; right surstylus heavily sclerotized, prominent, with tip somewhat pointed; right epandrial lamella with large expansion dorsoapically; outermost lobe of left surstylus simple, elongate. Head and thorax with black/dark brown setae. Vertical setae (2 pairs) and posthumeral setae present. Description. Male (Fig. 11). Body length 1.15–1.19 mm; head width 0.25–0.30 mm; wing length 1.32–1.44 mm. Head (Fig. 57) black in ground-colour and greyish pollinose; palpus whitish pollinose; proboscis brown; antenna brown/dark brown; setae and setulae on head black/dark brown. Frons relatively wide; in frontal view face below antennal sockets slightly narrower than frons. Ocellar setae (2 pairs) moderate in length, as long as scape, pedicel and postpedicel combined. Vertical setae (2 pairs) as long as ocellar setae. In frontal view gena narrow, 1 / 7 as wide as maximum eye height. Occiput with setulae. Antenna (Fig. 58): postpedicel round and slightly higher than pedicel in lateral view, bearing setulae on anterior margin; extension of postpedicel present dorsoapically; stylus short, 2 times as long as pedicel and postpedicel combined. Palpus with 6–8 setulae; sensory pit obscure even with preparation on slide. Thorax (Fig. 59) black in ground-colour and greyish pollinose; katepisternum largely polished; all setae and setulae black. Vestiture on thorax: 1 setula on each proepisternum; 1 pair of long, inflected postpronotal setae; 1 pair of distinct posthumeral setae; 2–3 pairs of notopleural setae; 1 pair of supra-alar setae; 1 pair of long, inflected postalar setae; 4 pair of dorsocentral setae near median line (one long pair near scutellum); some dorsocentral setulae in multiple rows; 1 pair of incomplete rows of acrostichal setulae; 1 pair of long, inflected apically scutellar setae; 1 pair of subapical scutellar setulae. Wing (Fig. 18) normally developed, clear, with pale brown veins. Basicosta with 1 long, black seta; costa with many dark brown setulae along anterior margin, ending at connection with vein M 1 + 2; subcosta absent; R 1 meeting costa at midway of wing; radial sector moderate in length; CuA 1 indistinctly connected to wing margin; anal vein reduced to pale, fold-like line. Calypter minute, whitish with brown tinge. Halter pale brown, large. Legs yellowish brown, stout. All setae on legs black; setulae on legs brown/pale brown. Fore femur sparsely covered with setulae (setulae of anteroventral and posteroventral rows long; some preapical setulae strong; 2 subbasal setulae long). Fore tibia covered with setulae (especially dense on anterior surface), with 1 anteroventral preapical seta and 1 posteroventral preapical seta. Fore tibial gland indistinct. Mid femur covered with setulae, with anteroventral row of 6–9 setae, posteroventral row of 6–10 setae, 1 anterior preapical seta, 1 anteroventral preapical seta, 1 posterior prearical seta and 1 posteroventral preapical seta. Mid tibia slightly inflexed, stout, covered with setulae, with anteroventral row of 11–14 strong, black spinulae (gradual shift of length of spinulae from basal to preapical present), 1 anterior preapical seta and 1 posteroventral preapical seta. Hind femur covered with setulae, with 1 anterior preapical seta and 1 anteroventral preapical seta. Hind tibia covered with setulae, with dorsal row of 3 setae, 1 anterodorsal preapical seta, 1 anterodorsal seta, 1 anterior preapical seta, anterior row of 2 setae, anteroventral row of 2 setae and 1 ventral preapical seta. Fore, mid and hind tarsomeres densely covered with setulae. Preabdomen sparsely covered with whitish setulae; tergites and sternites dark brown in ground-colour and sparsely greyish pollinose; membrane pale brown in ground-colour, sparsely whitish pollinose. Tergites 1–7 each with 1 or 2 indistinct, black plaques laterally and 1 pair of small pits dorsolaterally. Tergite 7 with some long setae along posterior margin. Eighth segment hidden, with some setae along posterior margin. Terminalia (Figs. 60–63). Coloration: right surstylus shiny black; right epandrial lamella and cerci dark brown in ground-colour and entirely whitish pollinose; left surstylus, left epandrial lamella and hypandrium shiny pale brown. Right surstylus being pointed lobe (Figs. 60, 62, 63), boundary line between it and right epandrial lamella somewhat obscure. Right epandrial lamella with black setae (Fig. 60), with conspicuously developed dorsoapical expansion with apical and dorsal processes (Fig. 62). Left surstylus composed of several lobes; outermost lobe simple, slender, bearing 1 short setula at apex (Fig. 61). Left cercus slender, bearing some setae; right cercus small, apically with some setae (Fig. 63). Female. Body length 1.27–1.39 mm; head width 0.38 – 0.38 mm; wing length 1.32–1.59 mm. Closely resembling males except in structure of mid tibia and terminalia. Mid tibia not inflexed, without anteroventral row of spinulae, with 2 anterodorsal setae, 1 anterior preapical seta, 1 ventral preapical seta and 1 posterior preapical seta, sparsely with setulae. Cercus dark brown in ground-colour and sparsely greyish pollinose. Type material. HOLOTYPE 3, labelled: Russian Far East, S. Primorye, Gamov Pen., Astaf’ev Bay, 26.viii. 2010, leg. T. Maeda (IBSS). Paratypes: 17 3, 14 Ƥ, same data as holotype. Other specimens examined (in alc.): 1 Ƥ, Amur Bay, 3–5 km E. Tavrichanka, 22.viii. 2010; 1 3, Andreevka, Risovaya Bay, 23.viii. 2010. Type depository. Two paratypes (male and female) are deposited in IBSS; some paratypes are in FMNH, NIAES and TMC. Etymology. The specific epithet is dedicated to the ant taxonomist, Prof. Seiki Yamane, of Kagoshima University, Japan. Distribution. Russian Far East: southern part of Primorsk Territory. Remarks. This species was collected only on sandy shores (Fig. 3) and was relatively rare in every locality surveyed.Published as part of Maeda, Takuya, 2011, New species of Chersodromia from the Russian Far East (Diptera: Empidoidea: Hybotidae: Tachydromiinae), pp. 1-24 in Zootaxa 2979 on pages 20-23, DOI: 10.5281/zenodo.20291
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Chersodromia mohican Maeda, 2011, sp. nov.
No full textChersodromia mohican sp. nov. (Figs. 8, 15, 34–40) Diagnosis. A somewhat large species measuring more than 1.5 mm, with wide gena. Katepisternum largely polished. Vein R 1 meeting costa after midway of wing. Fore tibial gland distinct. Male terminalia heavily sclerotized, with right surstylus composed of 3 distinct lobes, right epandrial lamella on right lateral side with incomplete row of brown setae, and oval left cercus. Vertical setae (2 pairs) and supra-alar setae present; posthumeral setae absent. Hind femur with anteroventral row of setae mainly in apical half. Description. Male (Fig. 8). Body length 1.80–1.95 mm; head width 0.38–0.42 mm; wing length 2.10–2.20 mm. Head (Fig. 34) black in ground-colour and greyish pollinose; palpus dark brown in ground-colour and greyish pollinose; proboscis brown, slightly shining; antenna dark brown; all setae and setulae on head black. Frons moderate in width; in frontal view face below antennal sockets slightly wider than frons. Ocellar setae (2 pairs) somewhat long, as long as scape, pedicel and postpedicel combined. Vertical setae (2 pairs) slightly longer than ocellar setae. In frontal view gena wide, 1 / 3 as wide as maximum eye height. Occiput sparsely with setulae. Antenna (Fig. 35): postpedicel round in lateral view, bearing setulae on anterior margin; extension of postpedicel present dorsoapically; stylus long, ca. 2.5 times as long as pedicel and postpedicel combined. Palpus with ca. 10 setulae (apical one longest) and sensory pit visible in wet specimens without preparation on slide. Thorax (Fig. 36) black in ground-colour and greyish pollinose; katepisternum largely polished; all setae and setulae black. Vestiture on thorax: 1 or 2 setulae on each proepisternum; 1 pair of postpronotal setae; no posthumeral setae; 3–4 pairs of notopleural setae; 1 pair of supra-alar setae; 1 pair of long postalar setae; 2–3 pairs of dorsocentral setae near median line; many dorsocentral setulae in multiple rows; 1 pair of incomplete rows acrostichal setulae; 1 pair of inflected apically scutellar setae; 1 pair of tiny subapical scutellar setulae. Wing (Fig. 15) normally developed, somewhat narrow, clear, with pale brown veins. Basicosta with 1 or 2 dark brown setae and some black setulae; costa with small, brown setulae along anterior margin, ending at connection with vein M 1 + 2; subcosta absent; R 1 meeting costa after midway of wing; radial sector moderate in length; CuA 1 indistinctly connected to wing margin; anal vein reduced to pale, fold-like line. Calypter greyish entirely and whitish partially. Halter dark brown. Legs brown, stout; all setae black; setulae black/brown. Fore femur covered with setulae, with anteroventral row of setae, 1 anterior preapical seta, 1 anteroventral preapical seta and 1 posterior preapical seta. Fore tibia covered with setulae (especially dense on anterior surface), with 1 anteroventral preapical seta and 1 posteroventral preapical seta. Fore tibial gland distinct. Mid femur covered with setulae, with 1 anterior preapical seta. Mid tibia covered with setulae, with anteroventral row of many tiny, black spinulae, 1 posterior preapical seta, 1 posteroventral preapical seta and 1 posteroventral seta. Hind femur covered with setulae, with ventral row of 1 or 2 setae near base, anteroventral row of ca. 5 setae mainly in apical half and 1 anterior seta near apex. Hind tibia covered with setulae (strong, short setulae present on ventral surface in apical part), with anterodorsal row of 3 setae, anterior row of 2 setae, 1 anterior preapical seta, anteroventral row of 2 setae and 1 anteroventral preapical seta. Fore, mid and hind tarsomeres densely covered with setulae. Preabdomen sparsely covered with brown setulae; tergites and sternites brown in ground-colour, sparsely whitish pollinose; membrane pale brown. Tergites 1–7 each with 2 plaques laterally and 1 pair of small shiny pits dorsolaterally. Tergite 7 with some black setae along posterior margin. Eighth segment hidden, with some black setae along posterior margin. Terminalia (Figs. 37–40). Coloration: right epandrial lamella brown in ground-colour and greyish pollinose; right cercus shiny pale brown; left cercus brown; left surstylus shiny brown; left epandrial lamella and hypandrium shiny brown (apical part of hypandrium light brown). Right surstylus composed of 3 lobes; apical lobe shiny dark brown, small and relatively complicated, boundary line between it and right epandrial lamella relatively obscure (Fig. 37); median lobe shiny pale brown, flattened and somewhat triangular with 2 long setulae at apex, boundary line between apical lobes obscure (Figs. 37, 39); basalmost lobe shiny brown, flattened, and looks like leaf of ginkgo (Fig. 39). Right epandrial lamella with incomplete row of brown setae on right lateral side (Figs. 37, 40). Left surstylus consisting of several lobes; outermost lobe large, composed of 2 main projections, of which bigger one somewhat round (Fig. 38). Right cercus small, sclerotized and elongate; left cercus large, heavily sclerotized and oval, with setae (Fig. 40). Female. Body length 1.65–1.70 mm; head width 0.43–0.49 mm; wing length 2.23–2.36 mm. Resembling males except in structures of mid leg and terminalia. Mid tibia without anteroventral row of spinulae, but with 1 anteroventral seta on median part. Cercus brown. Type material. HOLOTYPE 3, labelled: Russian Far East, S. Primorye, Nazimov Cape, 28.viii. 2010, leg. T. Maeda (USNM). Paratypes: 20 3, 20 Ƥ (dried specimens), same data as holotype. Other specimens examined (in alc.): 1 Ƥ, Gamov Pen., Astaf’ev Bay (bare sands), 26.viii. 2010; 2 3, 7 Ƥ, Gamov Pen., Telyakovskiy Bay, 24.viii. 2010; 23 3, 72 Ƥ, Nazimov Cape, 28.viii. 2010. Type depository. Some paratypes (males and females) are deposited in IBSS, NIAES, OUMNH, TMC and USNM. Etymology. The specific epithet “ mohican ” derives from an English word, “ mohican ” meaning a kind of human hair style. The incomplete row of brown erect setae on the right epandrial lamella of this species looks like Mohican style pattern. Distribution. Russian Far East: southern part of Primorsk Territory. Remarks. This species was not collected on the shores along bays. The adults were found only on sandy shores facing the open sea (Fig. 5), running about on washed up debris consisting mainly of seaweeds. Chersodromia mohican slightly resembles C. nubifera, both belonging to the hirta -group established by Chvála (1978). They have a wide gena, distinct fore tibial glands and a prominent basalmost lobe of the right epandrial lamella. In body size, however, C. mohican is smaller than C. nubifera. The size of the polished area on the katepisternum of C. mohican is larger than that of C. nubifera. The male terminalia of the former also differs from that of the latter in detail (see key to species).Published as part of Maeda, Takuya, 2011, New species of Chersodromia from the Russian Far East (Diptera: Empidoidea: Hybotidae: Tachydromiinae), pp. 1-24 in Zootaxa 2979 on pages 11-14, DOI: 10.5281/zenodo.20291
Image-based memory for robot navigation using properties of omnidirectional images
No full textThis paper proposes a new technique for vision-based robot navigation. The basic framework is to localise the robot by comparing images taken at its current location with reference images stored in its memory. In this work, the only sensor mounted on the robot is an omnidirectional camera. The Fourier components of the omnidirectional image provide a signature for the views acquired by the robot and can be used to simplify the solution to the robot navigation problem. The proposed system can calculate the robot position with variable accuracy (‘hierarchical localisation’) saving computational time when the robot does not need a precise localisation (e.g. when it is travelling through a clear space). In addition, the system is able to self-organise its visual memory of the environment. The self-organisation of visual memory is essential to realise a fully autonomous robot that is able to navigate in an unexplored environment. Experimental evidence of the robustness of this system is given in unmodified office environments
Characterization of totally umbilic hypersurfaces in a space form by circles
No full textsummary:In this paper we characterize totally umbilic hypersurfaces in a space form by a property of the extrinsic shape of circles on hypersurfaces. This characterization corresponds to characterizations of isoparametric hypersurfaces in a space form by properties of the extrinsic shape of geodesics due to Kimura-Maeda
Approximate identities and Young type inequalities in Musielak-Orlicz spaces
No full textsummary:We discuss the convergence of approximate identities in Musielak-Orlicz spaces extending the results given by Cruz-Uribe and Fiorenza (2007) and the authors F.-Y. Maeda, Y. Mizuta and T. Ohno (2010). As in these papers, we treat the case where the approximate identity is of potential type and the case where the approximate identity is defined by a function of compact support. We also give a Young type inequality for convolution with respect to the norm in Musielak-Orlicz spaces
Photolysis of diazirines in the presence of C-60: A chemical probe for carbene
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