287 research outputs found
Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil
No full textPepato, Almir R., Tiago, Cláudio G., Rocha, Carlos E. F. (2011): Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil. Zootaxa 2823: 47-60, DOI: 10.5281/zenodo.20563
Acarochelopodia caissara Pepato, Tiago & Rocha, 2011, sp. nov.
No full text<i>Acarochelopodia caissara</i> sp. nov. <p>(Fig. 8)</p> <p> <b>Material examined.</b> Male holotype (MZSP-AC82), Fazenda Beach, 28 May 2001. Paratypes: 1 male (MZSP- AC83), Picinguaba Beach, same date; 1 female (Pepato’s collection), same site and date; 2 males (Pepato’s collection), Fazenda Beach, same date; 1 male (MZSP-AC84), same locality and date. All mites collected by researchers of BIOTA /FAPESP Program.</p> <p> <b>Description.</b> Measurements summarized in Table 3.</p> <p>Female Male</p> <p>Length Width Length Width Idiosoma 145 69 138–143 63–71 Gnathosoma 47 28 45–46 26–28 AD 40 27 39 28–30 PD 32 22 39–41 21–25 OC 40 12 36– 39 12–19 GA 35 32 35–38 37–39 GO 26 15 20 14 Male. Dorsal and ventral plates without conspicuous ornamentation, except for areas pierced by canaliculi and muscle scars. Anterior dorsal plate with ds-1 at 0.21–0.31 of its total length, AD 1.61–1.77 times longer than wide. Ds-3 and 4 on striated cuticle between dorsal plates. OC without both corneae and pigment, suggesting absence of eyes. PD with ds-5 at 0.30–0.36 of its length, PD 1.60–1.71 times longer than wide. Adanal setae on posterior margin of PD.</p> <p>Anterior epimeral plate divided into 2 halves by longitudinal strip of striated cuticle. Each half of AE with 2 setae. PE partially divided into 2 halves by winding furrow, anteriorly joined by narrow band, with 2 ventral and 1 lateral setae. GA with 7 pairs of pgs. GO separated from anterior margin of GA by 15-18 or 0.43–0.47 times GA length. On genital sclerites, 3 pairs of subgenital setae, grouped 1:2, anterior pair filiform, both two posterior pairs blunt. Spermatophorotype 32-33 long, reaching beyond anterior margin of GA.</p> <p>Rostrum triangular, 0.43–0.44 times the overall length of gnathosoma. Basirostral and tritorostral setae on rostrum. P2 with 2 dorsal spines, P3 with medial spine, and P4 with 3 basal setae, 2 spurs and 1 setula on its apical portion.</p> <p>Leg chaetotaxy, spines on leg I in roman numbers: leg I, 1,2,4(I),5(II),9(VI), 6(I); leg II, 1,2,4,4,5,5; leg III, 2,1,2,3,5,4; leg IV, 1,0,2,3,5,3. Telofemur I with short and strong ventral spine. Genu I with ventromedial and ventrolateral spines, both serrulate and with basal swelling, former measuring approximately half latter’s length. Tibia I with 2 medial and 4 ventral spines. Ventrally, tarsus I with long smooth basal spine, and 2 distal setae. Such basal spine long, almost reaching distal end of tarsus. Tarsus I with 3 dorsal setae, grouped 1:2. Ambulacra I bearing median claw only. Two parambulacral setae unequal; anterior seta bacilliform and posterior slender, approximately twice as long as claw. Setae on remaining legs without setae but with conspicuous pecten, although ventral and medial setae on genua and tibiae II-IV sometimes thicker than dorsal setae. Tarsi II-IV with lateral claws welldeveloped and reduced medial claw.</p> <p>Female. Similar to male in most features. AD 1.48 times longer than wide, with ds-1 standing at 0.25 of its length. PD 1.45 times longer than wide, with ds-5 at 0.22 of its length. GO apart from anterior edge of GA by 7 or 0.20 of GA length. GA with 3 pairs of pgs, genital sclerites without subgenital setae.</p> <p> <b>Etymology.</b> The specific name <i>caissara</i> refers to traditional fishermen from Paraná, São Paulo and Rio de Janeiro states, Brazil.</p> <p> <b>Remarks.</b> Until now, ten species belonging to <i>Acarochelopodia</i> have been described, nine of which having been named. Bartsch (1988) described one species from Hawaii without assigning it to a valid name.</p> <p>The genus is defined by AE divided into two halves, each with two setae; tritorostral and basirostral setae on rostrum; palpal femur with one or two spines; leg I raptorial, bearing serrulate spines, one on telofemur, two on genu and five to seven on tibia; tarsus I slender with a long ventral spine almost as long as the segment; tarsus I with only medial claw, remaining tarsi with lateral claws well-developed and medial claws reduced.</p> <p> <i>Acarochelopodia caissara</i> <b>sp. nov.</b> may be distinguished from its congeners by the following combination of characters: rounded posterior AE, PE incompletely spliced, absence of small sclerites anterior to PD, lateral claws smooth, dorsal setae on tarsus I grouped 1:2 AD and PD length: width ratio of 1,61–1,77 and 1,60–1,70, respectively.</p> <p> Among named species, <i>A. delamarei</i> Angelier, 1954, <i>A. cuneifera</i> Bartsch, 1977, <i>A. angelieri</i> Travé, 1972, <i>A. biunguis</i> Bartsch, 1988 and <i>A. triunguis</i> Bartsch, 1988 share the presence of an acute posterior projection of AE. The species described here, as well as <i>A. aduncispina</i> Bartsch, 1977, <i>A. saruanlensis</i> Morselli & Mari, 1986, <i>A. tarentina</i> Morselli, Mari & Sarto, 1998, and <i>A. lapidaria</i> Bartsch, 1991 have a rounded posterior AE (Bartsch 1977, 1991, Morselli <i>et al</i>. 1998, Morselli & Mari 1986).</p> <p> However, <i>Acarochelopodia aduncispina</i> has the PE completely spliced and a pair of small sclerites anterior to the PD. <i>A. saruanlensis</i> also has a pair of sclerites anterior to the PD and lateral claws pectinate.</p> <p> <i>Acarochelopodia lapidaria</i> and <i>A. tarentina</i> have the dorsal setae on tarsus I equidistant instead of grouped 1:2, as in <i>A. caissara</i>. <i>A. lapidaria</i> also has AD and PD approximately as long as wide instead of a length: width ratio of 1.61–1.77 and 1.60–1.70, respectively, for these plates. <i>A. tarentina</i> has a distal swelling of the lateral claws.</p> <p> The species described by Bartsch (1988), although nameless, shares with <i>A. aduncispina</i> the outlines of idiosomal plates, having PE completely spliced instead of anteriorly joined by a narrow band.</p>Published as part of <i>Pepato, Almir R., Tiago, Cláudio G. & Rocha, Carlos E. F., 2011, Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil, pp. 47-60 in Zootaxa 2823</i> on pages 57-59, DOI: <a href="http://zenodo.org/record/205639">10.5281/zenodo.205639</a>
Rhombognathus abirus Pepato & Silveira, 2015, sp. nov
No full textRhombognathus abirus sp. nov (Figs 1–2) Holotype. Female (UFMG-AC 1200653), on algae associated to Rhizophora mangle pneumatophores at Fazenda River (23 ° 21 ’55,5”S 44 ° 50 ’18,6”W), 12 March 2005, water salinity: 6 ‰, coll. Silva, M. L., Tiago, C. G. & Pepato, A. R. Paratypes. Female (UFMG-AC 1200642), collecting data same as holotype; eleven males (UFMG- AC 1200643, UFMG-AC 1200647, UFMG-AC 1200654 – 9, UFMG-AC 1200661 – 3) on algae associated to Rizophora mangle and Avicenia schaueriana at Fazenda River (23 ° 21 ’38,5”S 44 ° 50 ’38,5”W), 12 March 2005, water salinity: 2 ‰, coll. Silva, M. L., Tiago, C. G. & Pepato, A. R.; male (UFMG-AC 1200660), collecting data same as holotype; Protonymph (UFMG-AC 1200664 – 5) on algae associated to Rizophora mangle and Avicenia schaueriana at Fazenda River (23 ° 21 ’38,5”S 44 ° 50 ’38,5”W), 12 March 2005, water salinity: 2 ‰, coll. Silva, M. L., Tiago, C. G. & Pepato, A. R.; Description. Measurements as summarized in Table 1. Female. Dorsal plates separate, almost smooth, areas of medial AD, anterior OC and regions of PD, corresponding to costulae in other species, pierced by canaliculi. Anterior dorsal plates with ds- 1 at 0.53–0.54 of AD length, these setae 41–45 µm long. First pair of gland pores at 0.25–0.28 of AD length. Posterior line of muscle scars at 0.78–0.82 of AD overall length. Pairs of ds- 2, glp- 2 and glp- 3 on OC, which also bears a couple of corneas and a pore canaliculus. Pair of ds- 3, usually present on OC, is absent. Length/height ratio of OC 1.65–1.76. Posterior dorsal plate with only pair of ds- 4 at 0.24–0.27 of its length, and pair of glp- 4 at its posterior margin. Anterior dorsal plate 0.81–0.89 as broad as PD. Short and stout adanal setae dorsal on anal papilla. Gnathosoma short, length: width ratio equal to 1.30. Rostrum 26–32 µm long, 36 µm wide, equaling 0.22–0.27 times the length of gnathosoma. Podocephalic channel running parallel and superficially on dorsal gnathosoma (Fig. 1 E). Two pairs of rostral setae placed on rostrum. Palpi four-segmented. Second palpal segment with one dorsal seta, third segment without setae, and fourth segment with three setae. Gnathosoma:Idiosoma ratio equal to 0.22–0.25. Ventral plates AE, PE, and GP fused in a ventral shield, medially fused to the anal plate with lateral wedges of striated cuticle (Fig. 1 D). AE and PE with a single pair and zero adjunct setae, respectively. Genital area with five pairs of pgs. Genital sclerites with two pairs of sgs. GO 90–103 µm long, 46–57 µm wide. Only two pairs of genital acetabula discernible. Leg chaetotaxy, bipectinate setae referred with roman numerals: leg I, 1,2,5–6,5(I), 5 (II), 3; leg II, 1,2,5,5,5(II), 3; leg III (Fig. 1 N), 1,1,2,3,5(I–II), 4; leg IV (Fig. 1 M), 0,1,2,3,5(II), 3. Telofemora I–IV with 4 /1, 4/1, 2/0, and 2 /0 dorsal/ventral setae; length: height ratio of telofemora I–IV: 2.46–2.76; 2.35– 2.68; 2.43–2.57; 2.18–2.43. Tarsus I with an arrowhead shaped famulus, setiform solenidion (5–6 µm long) and a pair of doublet eupathidia (Fig. 1 G). Tarsus II with setiform solenidion (6–7 µm long) and a pair of doublet eupathidia (Fig. 1 I). Tarsus III with a single eupathid and a pectinated spine (Fig 1 J). Tarsus IV with slender parambulacral setae and spine similar to that on tarsus III (Fig 1 O). Lateral claws well-developed, medial one lacking. Dorsal accessory process absent or vestigial. Claw shaft smooth. Male. Similar to female in most features (Dorsal plates in Fig. 1 A, Legs I and II in Figs 1 K and H). AE, PE, and GP fused in a ventral shield, medially fused to the anal plate with lateral wedges of striated cuticle. Genital area with 20–26 branched pgs, ranging from 10–13 on each side of GO, including 1–2 pairs of basilar setae (Fig. 1 C). Genital sclerites with two pairs of stout pgs. Spermatophorotype 98–113 µm long, 111–131 µm wide, surpassing anterior edge of GO by 25–43 µm. Tarsus IV with a plumose setae and a spine as parambulacral setae (Fig. 1 L). Tritonymph. Dorsal plates smaller than in adults (Fig. 2 G). Ventral plates AE, PE, and GP separated from each other by bands of striated cuticle (Fig. 2 J). AE with three pairs of setae, PE with four setae, both regions lack adjunct setae. On genital plate, three pairs of setae, medial one small and close to primordial genital opening. Leg chaetotaxy, bipectinate setae as Roman numerals: leg I (Fig. 2 H), 1,2,4,5(I), 5 (II), 3; leg II (Fig. 2 K), 1,2,4,4–5,5(I- II), 3; leg III (Fig. 2 L), 1,1,2,3,5(I), 4; leg IV (Fig. 2 I), 0,0,2,3,5(II), 3. Telofemora I–IV with 3 /1, 3/1, 2/0, and 2 /0 dorsal/ventral setae. nοtewοrthy that R. validipes Bartsch, 2000, R. mayseri Bartsch, 2009 and R. caribaeus Bartsch, 2007 have their pοsteriοr cοrneae subdivided; Character 22 was split in 22 a and 22 b tο accοunt fοr females and males, respectively; *, refers tο measurements taken frοm hοlοtype female, and **, refers tο thοse frοm hοlοtype male. When repοrting variatiοn, the mοst cοmmοn value is in bοld; In the accοunt fοr R. levigatus Bartsch, 2000 values frοm Abe & Fernandes, 2011 are repοrted in parentheses. ......continued on the next page TABLE 2. (Cοntinued) areolatus Abe & 5,5,5,5 0,0,0,0 2,1,1,2 285 ‾ 300? 175 ‾ 195 68 ‾ 73 60 ‾ 65 0.23 ‾ 0.24 Abe & Fernandes, 2011 Fernandes, 2011 aribus sp.nov. 5,5,5,5 1,0,0,0 2,2,(1, 2), 2 484 ‾ 526 461 ‾ 498 355 ‾ 416 105 ‾ 118 131 ‾ 151 0.22 ‾ 0.25 Τhis study Protonymph. Dorsal plates reduced (Fig. 2 A), ventral plates AE, PE, and GP separated from each other by bands of striated cuticle (Fig. 2 D). Three pairs of setae on AE, two setae on each PE. No setae on genital plate. Leg chaetotaxy, bipectinate setae as Roman numerals: leg I (Fig. 2 B), 1,2,3,4,5(II), 3; leg II (Fig. 2 C), 1,2,3,4,5(I), 3; leg III (Fig. 2 E), 1,0,2,3,5(I), 4; leg IV(Fig. 2 F), 0,2,3,5,2– 3. Telofemora I–III with 2 /1, 2/1, 2/0, and femur IV with 2 /0 dorsal/ventral setae. Etymology. The word abiru means in Tupi-Guarani large, fat or stuffed by food. Remarks. Abé (1998) provided a tabular key scoring 26 characters for distinguishing the 84 species known that far. In Table 2 we present an updated version of that key, including the 26 species described after its publication and the two species described herewith. In appendix we provide the character statements from Abé’s (1998) revision. The characters scored, even if they do not discriminate all known species; at least allow assigning them to small species groups. Rhombognathus abirus sp. nov. shares the chaetotaxy of telofemur, genu and tibia, and the lateral claws morphology with R. major Bartsch, 2005 (Bartsch, 2005 a). The species may be distinguished due the lacking of adjunct setae on PE, third pair of dorsal setae on OC and ventral setae on basifemura III–IV. Rhombognathu s abirus sp. nov. also differs due the presence of two bipectinate setae on all tibiae II and most of tibiae III.Published as part of Pepato, Almir R. & Silveira, Paulo Sergio Amorim Da, 2015, Two new species of Rhombognathus (Halacaridae, Trombidiformes) from a Mangrove in the northern littoral zone of São Paulo State (Brazil), pp. 500-510 in Zootaxa 3905 (4) on pages 501-507, DOI: 10.11646/zootaxa.3905.4.4, http://zenodo.org/record/23461
Halacaroides antoniazziae Pepato, Tiago & Rocha, 2011, sp. nov.
No full textHalacaroides antoniazziae sp. nov. (Figs. 6, 7) Material examined. Male holotype (MZSP-AC 81), Pitangueiras Beach, 1 August 2004, coll. A. R. Pepato. Paratypes: 1 female (MZSP-AC 78), 1 male (MZSP-AC 79), and 2 males and 1 female (Pepato’s collection), same site, date and collector. Description. Female. Idiosoma spindle-shaped, length 255–275, width 108–133. Dorsal plates without conspicuous ornamentation, except piercing of inner layers by pore canaliculi. AD 61–68 long, 48–52 wide, with ds- 1 at 0.32–0.34 of its length. Second to fifth pairs of dorsal setae on striated cuticle. OC 19–25 long, 9–12 wide, with anterior muscle scar. Two small sclerites: anterior, midway between ds- 2 and ds- 3: posterior, before insertion of leg IV. PD 38–48 long, 25–30 wide. One pair of adanal setae dorsally on anal papilla. AE 41–48 long, 78–86 wide, undivided, with 3 pairs of setae. Two pairs of small sclerites on ventral side of idiosoma. GA weakly sclerotized, 60–65 long, 51–55 wide, with 3 pairs of perigenital setae. GO 28–33 long, 30–35 wide. Genital sclerites without subgenital setae. Ovipositor ending 35–44 from anterior margin of GA. Three pairs of genital acetabula underneath genital sclerites. Gnathosoma slender, 163–173 long, 38–43 wide. Rostrum 0.52–0.55 of gnathosoma length. Palps 4 -segmented. P 2 with 1 seta placed distally. P 3 with small spur. P 4 with 3 basal setae and 2 distal spurs. Chaetotaxy of legs as follows, spiniform setae indicated by roman numerals: leg I, 1,2,2,5,10,6; leg II, 1,3,3,4,6(II), 4; leg III, 1,2,2,4(I), 6 (II), 3; leg IV, 1,0,3,4(I), 6 (II), 3. Tarsus I with 3 / 3 dorsal/ventral setae and pair of doublet eupathidia. Tarsus II with 3 / 1 dorsal/ventral setae; pair of doublet eupathidia unequal in length. Tarsus I with wide fossa membrane, other tarsi without well-developed fossa membranes. Claws of tarsi I-IV with dorsal accessory process each; claws of tarsi III-IV also with ventral pecten each. Male. Idiosoma 255–265 long. Similar to female in most features, except for genital area. GA 65–70 long, 53– 60 wide, with 41–44 perigenital setae. GO 24–26 long, 9–11 wide, apart from anterior margin of GA by 36–38. Three pairs of subgenital setae on genital sclerites grouped 1: 2. Two pairs of genital acetabula exterior, anterior pair internal to genital sclerites. Spermatophorotype extending 24-26 beyond anterior margin of GA. Etymology. The name is dedicated to Dr. Marta Antoniazzi, for her kind help throughout the A.R.Pepato’s doctoral thesis. Remarks. The genus Halacaroides was proposed by Bartsch (1981) on basis of two species, H. angustus Bartsch, 1981 and H. brevocularis Bartsch, 1981, collected in the Magellan Strait, Chile. To these species, H. australiensis Bartsch, 2008 was recently added by Bartsch (2008). Halacaroides species share a spindle-shaped body, delicate idiosomal plates, inconspicuous gland pores, longitudinally spliced PE, long gnathosoma, slender and parallel-sided rostrum, both trito- and basi-rostral setae on rostrum. Palpal chaetotaxy as follows: P 2 with distal seta, P 3 with spur, P 4 with three basal setae. Leg I is longer than leg II, and genua are shorter than tibiae and telofemora; tarsus I with three ventral setae, solenidion and famulus adjacent to lateral claw membrane; tarsus II with a single ventral seta and dorsomedial solenidion; tarsi III and IV without ventral setae. Halacaroides antoniazziae sp. nov. differs from H. angustus and H. brevocularis by the presence of three sgs in males and none in females instead of five and two in the latter two species, respectively. Also, regarding the genital area, males have all genital acetabula beneath the genital sclerites in H. angustus and H. breviocularis, whereas the posterior two pairs of genital acetabula are external in H. antoniazziae sp. nov. Halacaroides australiensis differs from the new species described here by the presence of seven dorsal setae on the idiosoma, AE longitudinally divided, presence of a single pair of sgs on female genital sclerites and a single external acetabula in males. Besides, the new species differs from other congeners by having almost double number of pgs in male. It is interesting to point out that H. antoniazziae sp. nov. was obtained only in a narrow section of Pitangueira Beach influenced by a small freshwater stream. Similar environmental setting was also observed for the type locality of H. australiensis. Since the function of genital acetabula is related to osmorregulation, this is remarkable that both species share external genital acetabula in males, a condition probably related to the hypertrophy of these structures. Other examples of such sexual dimorphism may be found among Acarothrix species (Bartsch 2004 c) and genera Rheolimnesia and Siboneyacarus, members of the cohort Hydrachnidia (Panesar 2004).Published as part of Pepato, Almir R., Tiago, Cláudio G. & Rocha, Carlos E. F., 2011, Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil, pp. 47-60 in Zootaxa 2823 on pages 55-57, DOI: 10.5281/zenodo.20563
Halacarus todaroi Pepato & Silveira, 2013, sp. nov.
No full textHalacarus todaroi sp. nov. (Figs. 3–4) Holotype: Female (UFMG-AC 1200178), from shell debris at a depth of 8 m near Itassucê Islet, Barequeçaba Beach (23 º 50 ' S, 45 º 27 ' W), 19 March 2007, coll. A. Todaro. Paratype: Male (UFMG-AC 1200177), from shell debris at a depth of 8 m near Itassucê Islet, Barequeçaba Beach (23 º 50 ' S, 45 º 27 ' W), 25 August 2008, coll. A. Pepato. Description. Female: Idiosoma length 502, width 236. AD length 190, including the anterior triangular spine 34 μm long, width 207, with reticulate surface (Fig. 4 B). Ds- 1 on AD, at level 0.60 of AD, posterior to gp- 1. Gp- 1 at level 0.45 of AD. OC length 17, width 10, lacking corneae (Fig. 4 B). Ds- 2 to ds- 5 on membranous cuticle. Gp- 2 ventrally displaced, at level 0.38 of idiosoma length. Pore canaliculus on posterior corner of OC. Gp- 3 at level 0.45 of idiosoma length. Gp- 4 at level 0.72 of idiosoma. PD length 138, width 97. Adanal setae on the rear of PD, at same level as gp- 5. AE length 105, width 226, with three pairs of setae and without epimeral pores. PE with three ventral setae and one dorsal seta. Anterior pair of pgs placed on GA, apart from anterior edge of GO by 28. GA length 95, width 107. GO length 54, width 35, 41 μm from anterior edge of GA. A single pair of pgs close to GO on GA. Three pairs of sgs on genital sclerites, grouped 1: 2. Gnathosoma length 130, width 77. Rostrum length 66, equal to 0.51 of gnathosoma length. Trito- and basirostral setae on rostrum (Fig. 3 C). Legs with striated cuticle (Fig. 4 A). Leg chaetotaxy as follows: Leg I, 1, 2, 8 (2 S), 11 (2 S), 13 (4 S), 5 (2 S); leg II, 1, 4, 6, 8 (1 S), 10 (2 S, 1 B), 5; leg III, 2, 2, 4, 5, 8, 3; leg IV, 1, 2, 4, 5, 8, 3. Tarsus I with three dorsal and two ventral setae, three pairs of eupathidia as parambulacral setae, and setiform famulus and solenidion. Tarsus II with three dorsal and two ventral setae, two pairs of eupathidia and a setiform solenidion. Tarsi III-IV with a pair of parambulacral setae and three dorsal setae, without ventral setae. Length of telofemora, genua and tibiae of leg I, 122 μm, 111 μm, and 93 μm, respectively. Lateral claws without pecten, with a narrow accessory process. Median claw bidentate. Male: Idiosoma length 462, width 216; AD, length 172, width 111; OC length 16, width 8; PD length 103, width 100. Similar to female in most features, except for the characteristics of the genital area and plumose parambulacral setae on tarsus IV in the male. GA length 121, width 102. GO length 33, width 30, 70 μm from anterior margin of GA. 54 perigenital setae surrounding GO. Two pairs of distinct outlying setae beside GO. Subgenital setae on genital sclerites, grouped 2: 2. Spermatophorotype extending 18 μm beyond GO (Fig. 3 E). Etymology. The name is dedicated to Dr. Antonio Todaro, who gave one of the individuals to the first author, and for his relevant contributions to the knowledge of meiofauna. Remarks. Halacarus todaroi sp. nov. can be distinguished from congeners by the following set of characteristics: Absence of conspicuous sexual dimorphism concerning the extension of PD, which does not bear gp- 4 in either sex; corneae and gp- 3 lacking on OC, although this plate is present and bears a pore canaliculus at its posterior corner; absence of a platelet posterior to OC or on PD, no pgs anterior to GA in neither female nor male; leg epicuticle striated. Some of the characteristics listed above are unclear from the original description of Halacarus validus by Gimbel (1919) and the re-description by Newell (1984). However, H. validus clearly differs from the species described here in the narrow AD posterior to gp- 1, and ds- 1 and gp- 1 aligned. In H. todaroi sp. nov., AD is broader on its posterior portion, and ds- 1 is posterior to gp- 1. Other species that share some features with this new species are Halacarus bisulcus Viets, 1927 and Halacarus propiquus (Viets, 1940). Halacarus propiquus, however, is discernible from the new species by the presence of ventral setae on tarsi III and IV, and epicuticle on femora most likely punctuate instead of striated (Newell, 1984); Halacarus bisulcus is also distinct from H. todaroi sp. nov. in the presence of combs on lateral claws of tarsi II and III, and pgs ordered in a single ring around GO and three to four pairs of outlying setae in the male (Green & Macquitty, 1987; Bartsch, 1980; Monniot, 1962), totaling 43 pgs according to Bartsch (1980, fig. 19) instead of two pairs of outlying setae and 58 pgs ordered in two rings in H. todaroi sp. nov.Published as part of Pepato, Almir R. & Silveira, Paulo Sergio Amorim Da, 2013, Two new species of Halacarus (Acari, Prostigmata) from Brazil, pp. 591-600 in Zootaxa 3670 (4) on pages 597-599, DOI: 10.11646/zootaxa.3670.4.10, http://zenodo.org/record/21787
Rhombognathus picinguabensis Pepato & Silveira, 2015, sp. nov
No full textRhombognathus picinguabensis sp. nov (Fig. 3) Holotype. Female (UFMG-AC 1200645) on algae associated to Rizophora mangle and Avicenia schaueriana at Fazenda River (23 ° 21 ’38,5”S 44 ° 50 ’38,5”W), 12 March 2005, water salinity: 2 ‰, coll. Silva, M. L., Tiago, C. G. & Pepato, A. R. Paratypes. Female (UFMG-AC 1200674) and male (UFMG-AC 1200675) collecting data same as holotype. Description. Female: Idiosoma 341–346 µm long, 231–243 µm wide. AD and OC almost smooth, PD slightly paneled, except for costulae which are pierced by canaliculi (Fig. 3 A). AD 97 µm long, 110 µm wide with ds- 1 at 0.51 of plate length, such setae 11–21 µm long, similar to posterior dorsal setae. Pair of glp- 1 at 0.48 of AD length. AD length/width ratio 0.88. Posterior line of muscle scars at 0.76 of AD overall length. OC 121–123 µm long, 82–84 µm wide. Pairs of ds- 2, ds- 3, glp- 2, glp- 3 and a pore canaliculus on OC. Holotype bears two corneas, female paratype asymmetrically none and one cornea. Length/height ratio of OC 1.44–1.50. PD 220–221 µm long, 125–128 µm wide with only pair of ds- 4 at 0.47–0.51 of its length, and pair of glp- 4 at its posterior margin. AD 0.44 as long as PD. Adanal setae dorsal on anal papilla. Gnathosoma (Figs 3 B–C). 66–70 µm long, 74 µm wide, length: width ratio equal to 1.0 6 (paratype female). Rostrum 24–32 µm long, 21 µm wide (paratype female), equaling to 0.36–0.45 of gnathosoma length. Gnathosoma:Idiosoma ratio equal to 0.19–0.21. All ventral plates fused (Fig. 3 D). AE with two pairs of adjunct setae, PE without adjunct setae. Genital area surrounded by 5–6 pairs of pgs. Genital sclerites with two pairs of sgs. GO 70–74 µm long, 33–36 µm wide. The paratype female presents ovipositor everted. There are two pairs of anterior and three pairs of posterior stout and pectinate eugenital setae (Fig. 3 F). Leg chaetotaxy, bipectinate setae referred with roman numerals: leg I (Fig. 3 G), 1,2,6,5,5(II), 3; leg II (Fig. 3 H), 1,2,6,5,5(I), 3; leg III (Fig. 3 L), 1,2,3,3,5(I), 4; leg IV, 0,2,3,3,5(II), 3. Telofemora I–IV with 4 /2, 4/ 2, 3/0, and 3 / 1 dorsal/ventral setae; length: height ratio of telofemora I–IV in holotype female: 1.57; 1.81; 2.00; 2.0 6. Tarsus I with papiliform famulus, setiform solenidion (6–7 µm long) and pair of doublet eupathidia (Fig. 3 K). Tarsus II with a setiform solenidion (7–8 µm long) and a pair of doublet eupathidia (Fig. 3 I). Tarsus III with a single eupathid and a faintly pectinated spine (Fig. 3 J). Tarsus IV with a single eupathid and a spine similar to that on tarsus III (Fig. 3 M). Lateral claws well-developed, medial one lacking. Dorsal accessory process vestigial. Male. Idiosoma 354 µm long, 222 µm wide, similar to female in most features. AD 98 µm long, 110 µm wide. OC 126 µm long, 89 µm wide. PD 223 µm long, 136 µm wide. Genital area with 21 branched pgs (Fig. 3 E). Genital sclerites with two pairs of sgs. Spermatophorotype absent in the individual observed. Tarsus IV (Fig. 3 N) with a plumose seta and a pectinate spine as parambulacral setae. Etymology. The specific epithet refers to “Vila de Picinguaba”, a fishermen village near to the type locality. Remarks. Among Rhombognathus species, a leg chaetotaxy formulae combining Telofemura I–IV with 6,6,3,3 setae, Genua with I–IV 5,5,3,3 setae, and setae and claws with vestigial accessory process are also found in Rhombognathus parvulus Viets, 1939 (Viets 1939). This species can be easily separated from R. picinguabensis sp. nov. due the fusion of all dorsal plates in a single dorsal shield.Published as part of Pepato, Almir R. & Silveira, Paulo Sergio Amorim Da, 2015, Two new species of Rhombognathus (Halacaridae, Trombidiformes) from a Mangrove in the northern littoral zone of São Paulo State (Brazil), pp. 500-510 in Zootaxa 3905 (4) on pages 507-509, DOI: 10.11646/zootaxa.3905.4.4, http://zenodo.org/record/23461
FIGURE 2. Scaptognathides delicatulus Bartsch, 2004 in Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil
No full textFIGURE 2. Scaptognathides delicatulus Bartsch, 2004, protonymph: A, dorsum of idiosoma; B, venter of idiosoma; C, leg I in lateral view; D, leg IV in medial view; E, leg II in medial view; F, leg III in lateral view. Scale bars = 25 µm.Published as part of Pepato, Almir R., Tiago, Cláudio G. & Rocha, Carlos E. F., 2011, Psammophilous halacarid mites (Trombidiformes, Halacaridae) from the North Coast of São Paulo State, Brazil, pp. 47-60 in Zootaxa 2823 on page 50, DOI: 10.5281/zenodo.20563
Figure 3 in Description of a new species of Rhombognathus (Halacaridae, Acari), its spermiogenesis and spermatozoa
No full textFigure 3. Rhombognathus levigatoides sp. nov., tritonymph. (A) Idiosoma, dorsal; (B) idiosoma, ventral; (C) leg I; (D) leg IV; (E) leg III; (F) leg II. Scale bars: 50 mm (A, B); 25 mm (C–F).Published as part of Pepato, Almir R. & Da Rocha, Carlos E.F., 2007, Description of a new species of Rhombognathus (Halacaridae, Acari), its spermiogenesis and spermatozoa, pp. 2433-2445 in Journal of Natural History 41 (37-40) on page 2438, DOI: 10.1080/00222930701567877, http://zenodo.org/record/523314
FIGURE 3 in Halacaridae) from the northern littoral zone of São Paulo State (Brazil)
No full textFIGURE 3: Copidognathus tupinamborum sp. nov., protonymph: A—Idiosoma, dorsal view. B—Idiosoma, ventral view. C—Leg I, lateral view. D—Leg III, lateral view. E—Leg IV, medial view. F—Leg II, lateral view. Scale bars: A, B, 50µm; C, D, E and F: 25 µm.Published as part of Pepato, Almir R. & Tiago, Cláudio G., 2005, Halacaridae) from the northern littoral zone of São Paulo State (Brazil), pp. 1-35 in Zootaxa 1083 on page 6, DOI: 10.5281/zenodo.17041
Agauopsis itassussensis Pepato & Tiago, 2005, sp. nov.
No full textAgauopsis itassussensis sp. nov. (Fig. 1) Holotype: Female (MZUSP 16630), from coarse sand at 8 m depth near Itassucê Islet, Barequeçaba Beach (23 º 50 ' S, 45 º 27 ' W), May 1 st 2003, coll: J. Norenburg, C. Santos, G. Y. Kawauchi and L. F. Netto. Paratypes: Four females (author's collection), from intertidal coarse shell debris and gravel on south end of Barequeçaba Beach faced to the Itassucê Islet (23 º 50 ' S, 45 º 27 ' W), April 30 th 2003, coll.: J. Norenburg Comparative material examined: Agauopsis okinavensis Bartsch, 1986. Female identified by Otto (1999) mounted on a single slide [Australian National Insect Collection (ANIC), slide nº. 866]. From Great Barrier Reef, John Brewer Reef (18 ° 38 ' 25 " S 147 °04' 42 "E), collected April 11 th 1998 by SCUBA diving, on coarse sand, 15 m depth. Description. Female: Idiosoma 430–460 m long, 316–340 m wide. Anterior dorsal plate with one frontal and two lateral spines, an anterior areola and two convergent costae joined by a transversal ridge slightly anterior to insertion sites of ds 1. Such areola and costae are made up of quadrangular panels and alveolus in deeper cuticle layers while the transversal ridge between AD costae is devoid of them. AD 145–168 m long and 150– 173 m wide with ds 1 attached at 0.30–0.34 of its overall length. Pair of ds 2 attached to membranous cuticle between AD and OC. Ocular plate 135– 142 m long and 47–56 m wide, caudate, with two conspicuous corneas. The caudiform prolongation of OC reaches half of the distance between insertion of legs III and IV. Posterior dorsal plate measures 241–251 m in length and 149–203 m in width. This plate bears two costae similar to the one found on AD. Between their posterior extremities to level of the posterior pair of gland pores these costae are parallel one to each other, posterior to gp they are divergent. Posterior dorsal plate also bears ds 3 and ds 4. Adanal setae inserted nearby posterior end of PD, on anal papillae. Epimeral plates separated by stripes of membranous cuticle, with papillate areola in their margins. Anterior epimeral plate posteriorly extended with three pairs of setae. It measures 221–245 m in length and 311–339 m in width. Posterior epimeral plates with one dorsal and three ventral setae. Genitoanal plate 123–128 m long and 155–169 m wide. It has a pair of areolae lateral to GO, which almost reaches the first pair of pgs level. Distance between anterior edge of GA and GO 58– 63 m. Genital opening measures 68–75 m in length and 33–40 m in width. Gnathosoma dorsally ornamented by tiny granules. It measures 161–168 m in length and 69–76 m in width with the rostrum equaling 0.54–0.56 of its overall length. Palp longer than rostrum and with a dorsal seta on P 2; one slender and tapering spine on P 3; two terminal hairlike setae and two spurs on P 4. Ornamentation on leg cuticle made up of tiny granule arranged in a large mesh pattern. Leg chaetotaxy with the spines setae referred with Roman numerals: leg I, 1,2,8(V), 5 (II), 8 (III), 5 (I); leg II, 1,2,5,4,5,3; leg III, 1,2,3,3,4,3; leg IV, 1,2,3,3,4,3. When observed under 1,600 times magnification most setae on proximal segments of legs proved to be haired with very thin filaments. Spines on leg I with denticles apically but without the lateral rows, which are observed in other species. Tarsus I with one pair of parambulacral setae, one pair of ventral setae, one solenidion and one famulus posteriorly inserted. Tarsus II with a pair of parambulacral setae. Tarsi III and IV without any parambulacral setae. All tarsi with smooth lateral claws and median claw present only at tarsus I. Etymology: Agauopsis itassussensis is named after the type locality, near the Itassucê Islet. Remarks: Agauopsis itassussensis sp. nov. belongs to the okinavensis group which comprises three species: A. okinavensis Bartsch, 1986 recorded from Okinawa (Japan), Great Barrier Reef and Coral Sea; A capillosa Otto, 1999 recorded from the Great Barrier Reef; and an undescribed species represented by a juvenile collected from Bermudas Islands (Bartsch, 1986, 1999, Otto, 1999). Agauopsis itassussensis can be readily separated from A. capillosa Otto, 1999 by the posteriorly extended AE. In other hand, such feature is shared with the very similar species A. okinavensis which, however, lacks a caudiform extension on OC, which ends slightly beyond insertion of leg III. Furthermore, A. okinavensis displays the posterior costae of PD uniformly divergent instead of running close to each other along their posterior portion.Published as part of Pepato, Almir R. & Tiago, Cláudio G., 2005, Two new species of Agauopsis (Halacaridae, Acari) from Southeastern Brazil, pp. 1-12 in Zootaxa 994 on pages 2-5, DOI: 10.5281/zenodo.17139
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