identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
F21A8787FF90F700E6A6FB76FCB64D59.text	F21A8787FF90F700E6A6FB76FCB64D59.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pseudocrangonyx Akatsuka & Komai 1922	<div><p>Genus Pseudocrangonyx Akatsuka &amp; Komai, 1922</p> <p>syn.: Pseudocrangonyx Akatsuka &amp; Komai, 1922, p. 120, figs 1, 2, (orig. descrip.)—Tomikawa et al. 2008, p. 276 (type species redescrip.)</p> <p>Type species. Pseudocrangonyx shikokunis Akatsuka &amp; Komai, 1922 [type loc.—water well in Tomioka, Tokushima Prefecture, Shikoku Isl., Japan]</p> <p>Remarks. Although phenotypic features clearly differentiated a new species from other representatives of the genus Pseudocrangonyx, we compared mt- cox1 sequences from 7 members of the genus to confirm their distinctness. The newly described species well as P. f e b r a s, P. kseniae, and P. korkishkoorum that are also known from Primory and P. susunaensis from neighboring Sakhalin were analyzed.</p> <p>Each amphipod specimen sequenced for this study was characterized by a unique cox1 sequence (Fig. 2). Five highly similar (pairwise distances 0.025–0.003) P. korkishkoorum accessions KF153105 – KF153109 formed moderately supported (75 %) clade further split into two subclades corresponding to closely located rivers Narva and Barabashevka. This lineage had P. tiunovi, sp. nov. as a sister (100 %). P. susunaensis and P. sympatricus, sp. nov. formed another moderately supported sister pair (79 %) with P. febras branching basally (68 %). Relationship between P. kseniae and P. holsingeri, sp. nov. remained unresolved in our analysis.</p> <p>There was notable difference in pairwise distances between the sequences. The most distinct from each other were P. susunaensis and P. holsingeri, sp. nov. (0.201) while in most other cases the distances did not exceed 0.150–0.170. Only difference between P. korkishkoorum and P. tiunovi, sp. nov. did not exceed 0.076 although these species clearly differ morphologically (see below).</p> </div>	https://treatment.plazi.org/id/F21A8787FF90F700E6A6FB76FCB64D59	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sidorov, Dmitry A.;Gontcharov, Andrey A.	Sidorov, Dmitry A., Gontcharov, Andrey A. (2013): Studies on subterranean amphipod crustaceans of Primory, Russia. Part 1. Three new species of the genus Pseudocrangonyx from springs and other groundwater habitats in far eastern Russia. Zootaxa 3693 (4): 547-567, DOI: 10.11646/zootaxa.3693.4.8
F21A8787FF91F708E6A6F9DCFB924826.text	F21A8787FF91F708E6A6F9DCFB924826.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pseudocrangonyx tiunovi Sidorov & Gontcharov	<div><p>Pseudocrangonyx tiunovi Sidorov &amp; Gontcharov, sp. nov.</p> <p>(Figs 3 A, 4–32)</p> <p>Diagnosis. Medium-sized species with marked secondary sexual dimorphism. Dorsal surface of body segments smooth (Fig. 3 A), relatively stout, teretial, bearing sets of fine setae. Eyes absent. Body unpigmented. Interantennal lobe of the head rounded, slightly tapered; inferior antennal sinus moderate (Fig. 4). Antenna 1 about 50% length of body. Antenna 2 with swollen peduncular article 5 in males, both sexes without calceoli. Palp mandible article 3 with 4 B-seta, 15 D-setae and 6 E-setae. Ventral surface of pereonites 2–7 with sternal humps (blisters). Pereopod 6 largest. Urosome without “ecdysial setae”. Uropod 1 with 1 basofacial seta. Inner ramus of male uropod 2 with serrate setae. Telson emarginated. Body length 7.5–9.0 mm (females), 6.0–8.0 mm (males).</p> <p>Type locality. Russia, Far East, suburb of Vladivostok, not far from the Tikhaya Bay (43º04.951' N 131º57.101' E), spring, 85 m above sea level.</p> <p>Material examined. Holotype: male, 8.0 mm, X38656 /Cr-1472-FEFU, Russia, Primory Territory, spring (43º04.951' N 131º57.101' E), 11 Apr 2010, coll. I.M. Tiunov &amp; E.A. Gorovaya. Paratypes: 11/6sd-IBSS, 4 females (9.0 mm, oostegites developed, setose, 8.5 mm, oostegites developed, setose, 7.5 mm, oostegites developed, nonsetose, female, fragment, oostegites developed, non-setose); 1 male (6.0 mm); 1 juvenile (4.7 mm); paratypes with same data as holotype.</p> <p>Etymology. Species named after our colleague ornithologist Ivan M. Tiunov (Institute of Biology and Soil Science, Vladivostok) who found and collected this species.</p> <p>Description. Male (8.0 mm), X38656 /Cr-1472-FEFU. Head. Antenna 1 (Figs 4, 9) 50% length of body, 64% longer than antenna 2; peduncular articles 1–3 in length ratio 1:0.8:0.5; primary flagellum with 19 articles; aesthetascs present. Antenna 2 (Fig. 10), peduncular articles 4 and 5 in lengths ratio 1:1; peduncular article 5 swollen; flagellum with 6 articles; calceoli absent. Left mandible (Fig. 18) incisor 5-dentate; lacinia mobilis 5- dentate; setal row with 4 serrate setae. Right mandible (Fig. 19) incisor 5-dentate; lacinia mobilis trifurcate. Molar process triturative, with accessory seta. Palp mandible article 2 slightly shorter than article 3; article 3 with 4 Bseta, 15 D-setae and 6 E-setae. Lower lip (Fig. 20), inner lobes absent; mandibular process distinct (narrow). Maxilla 1 (Fig. 16), inner plate with 4 plumose setae; outer plate with 7 serrate setae; palp article 2 about 3x longer than article 1 bearing 4 robust setae on apex. Maxilla 2 (Fig. 15), inner plate with 5 plumose setae. Maxilliped (Fig. 21) inner plate with 6 strong serrate apical setae; outer plate with a row of 3 medial robust serrate setae, 13 naked setae and 3 apical plumose simple setae. Pereon. Coxal plates 1–4 (Figs 7, 8, 22, 23) shallow, sub-rectangular. Gnathopod 1 (Fig. 7), carpus 0.4× as long as propodus, with 1 rastellate setae; propodus palm oblique, defining angle indistinct, palm with cutting margin crenulated, palm with 13 distally notched robust setae in two rows and 8 distally notched robust setae near defining angle; dactylus, inner margin dentate. Gnathopod 2 (Fig. 8), carpus 0.6× as long as propodus, with 2 rastellate setae; propodus smaller than gnathopod 1 propodus; palm sub-transverse, defining angle distinct, palm with cutting margin crenulated, palm with 10 distally notched robust setae in 2 rows and 6 distally notched robust setae near defining angle; dactylus similar to that of gnathopod 1. Pereopod 6 longer than pereopod 7. Pereopods 3 and 4 (Figs 22, 23) with a row of short setae on posterior margin; carpus shorter than propodus. Coxal gill 7 absent. Ventral surface of pereonites 2–7 bearing sternal humps (blisters). Pleon. Epimera 1–3 (Fig. 5): posterior corners obtuse, armed with 1 stiff seta each; ventral margin of plate 1 without setae, plate 2 with 3 setae and plate 3 with 4 setae. Pleopods 1–3 (Fig. 6), peduncular articles with 2 coupling setae (retinaculae). Urosome (Fig. 3 A): urosomite 1, “ecdysial setae” absent. Uropod 1 (Fig. 11): peduncle with 7 setae on outer margin, 1 long seta on inner margin on distal corner and with 1 basofacial seta; outer ramus 0.7× as long as inner ramus, about 50% length of peduncle; inner ramus armed with 5 setae on both margins and with 3 long setae on ventral face; outer margin of outer ramus unarmed; rami with 4–7 setae on apices, one of them very long. Uropod 2 (Fig. 12): peduncle with 4 setae on outer margin and 1 seta on inner margin; outer ramus 0.6× as long as inner ramus; inner ramus longer than peduncle, armed with setae on both margins; outer margin of outer ramus unarmed; rami with 3–6 setae on apices, one or two of them longer and some serrate. Uropod 3 (Fig. 13): uniramous; peduncle with 2 sets of stiff setae on distal margins; proximal article of outer ramus 4.0× as long as peduncle, bearing 8 sets of setae on inner and outer margins; terminal article 0.2× as long as proximal article, with 3 setae on apex. Telson (Fig. 14): 1.8× as long as uropod 3 peduncle; 0.3× longer than broad, emarginated; tips of lobes each with 2 strong setae apically, one of them longer.</p> <p>Female (7.5 mm), 11/6sd-IBSS, sexually dimorphic characters. Head. Antenna 2 (Fig. 27): peduncular articles 4 and 5 densely setose; article 5 non-swollen; flagellum with 7 articles bearing rod-shaped structures; calceoli absent. Pereon. Coxal plate 2 (Fig. 32) trapeziform. Gnathopod 1 (Fig. 31): palm with 6 distally notched robust setae in 2 rows and 5 distally notched robust setae near defining angle; dactylus with 2 setae along outer margin. Gnathopod 2 (Fig. 32): palm with 9 distally notched robust setae in 2 rows and 6 distally notched robust setae near defining angle. Pereopods 3 and 4 with a row of short and long setae on posterior margin; carpus somewhat shorter than propodus. Pleon. Uropod 2 (Fig. 28): inner ramus without serrate robust setae. Uropod 3 (Fig. 29): proximal article of outer ramus 3.0× as long as peduncle, bearing 6 sets of setae on inner and outer margins. Telson (Fig. 30): 1.7× as long as uropod 3 peduncle. Oostegites 2–5 on gnathopod 2 and pereopods 3–5 (Fig. 32) sub-linear, unmatured without marginal setae.</p> <p>Variability. Flagellum of antenna 2 with 5–7 articles. Slight variation in arming of outer rami of uropods 1 and 2 was observed, as well in slightly different degree of telson emargination.</p> <p>Taxonomic comments. P. tiunovi, sp. n. resembles P. elenae Sidorov, 2011 by the shape and structure of both gnathopods and by the relatively large body size. The absence of “ecdysial setae” is similar feature with P. levanidovi Birstein, 1955, P. cavernarius Hou et Li, 2003, P. febras Sidorov, 2009, P. kseniae Sidorov, 2012 and with both new species described below. The shape and structure of uropod 3 with 6–8 sets of setae on the proximal article of outer ramus and long terminal article is similar in P. bohaensis (Derzhavin, 1927), P. korkishkoorum Sidorov, 2006 and P. asiaticus sensu Ueno, 1934 but new species differs by structure of mouth parts and by shape and armament of both gnathopods. The swollen article 5 and absence of calceoli on male antenna 2 are unique characters distinguishing P. tiunovi, sp. n. from all currently known species of the genus.</p> <p>Distribution and ecology. Known only from type locality. Ecology unknown.</p></div> 	https://treatment.plazi.org/id/F21A8787FF91F708E6A6F9DCFB924826	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sidorov, Dmitry A.;Gontcharov, Andrey A.	Sidorov, Dmitry A., Gontcharov, Andrey A. (2013): Studies on subterranean amphipod crustaceans of Primory, Russia. Part 1. Three new species of the genus Pseudocrangonyx from springs and other groundwater habitats in far eastern Russia. Zootaxa 3693 (4): 547-567, DOI: 10.11646/zootaxa.3693.4.8
F21A8787FF98F70CE6A6FD91FE3849D3.text	F21A8787FF98F70CE6A6FD91FE3849D3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pseudocrangonyx holsingeri Sidorov & Gontcharov	<div><p>Pseudocrangonyx holsingeri Sidorov &amp; Gontcharov, sp. nov.</p> <p>(Figs 3 B, 33–63)</p> <p>Diagnosis. Small-sized species with marked secondary sexual dimorphism. Dorsal surface of body segments smooth (Fig. 3 B), teretial, bearing detached fine setae. Eyes absent. Body unpigmented. Interantennal lobe of the head (Fig. 33) rounded, slightly tapered; inferior antennal sinus moderate. Antenna 1 about 30% length of body. Antenna 2 with calceoli in females. Palp mandible article 3 with 2 B-seta, 7 D-setae and 4 E-setae. Ventral surface of pereonites 2–7 with sternal humps (blisters). Pereopod 6 largest. Urosome without “ecdysial setae”. Uropod 1 with 2 basofacial seta. Inner ramus of male uropod 2 without serrate setae. Telson emarginated. Body length 2.8– 5.5 mm (females), 4.0– 4.2 mm (males).</p> <p>Type locality. Russia, Far East, Steklajnuha River (43º21.027' N 132º27.723' E), subterranean waters (hyporea), 34 m above sea level.</p> <p>Material examined. Holotype: female (5.5 mm, oostegites developed, non-setose), X38654 /Cr-1470-FEFU, Russia, Primory Territory, the Steklajnuha River (43º21.027' N 132º27.723' E), 12 Jun 2010, coll. D.A. Sidorov &amp; K.A. Semenchenko. Paratypes: 11/7sd-IBSS, 3x females (3.5 mm, oostegites developed, non-setose), 3x females (2.8 mm, oostegites developed, non-setose), 2 males (4.2 mm, 4.0 mm); paratypes with same data as holotype.</p> <p>Etymology. Species named in honor of famous zoologist John R. Holsinger (Old Dominion University, Norfolk, VA, USA) for his outstanding contribution to the systematics of subterranean crustaceans.</p> <p>Description. Female (5.5 mm), X38654 /Cr-1470-FEFU. Head. Antenna 1 (Fig. 34) about 30% length of body, 74% longer than antenna 2; peduncular articles 1–3 in length ratio 1:0.8:0.5; primary flagellum with 16 articles; aesthetascs present. Antenna 2 (Fig. 35), peduncular articles 4 and 5 in lengths ratio 1:0.9; flagellum with 6 articles; calceoli present. Left mandible (Fig. 47) incisor 5-dentate; lacinia mobilis 5-dentate; setal row with 5 serrate setae. Right mandible (Fig. 48) incisor 5-dentate; lacinia mobilis trifurcate. Molar process small, triturative, with short accessory seta. Palp mandible article 2 slightly shorter than article 3; article 3 with 2 B-seta, 7 D-setae and 4 Esetae. Lower lip (Fig. 43), inner lobes absent; mandibular process indistinct (roundish). Maxilla 1 (Fig. 45), inner plate with 4 plumose setae; outer plate with 7 serrate setae; palp article 2 about 2.0× longer than article 1 bearing 2 robust setae on apex. Maxilla 2 (Fig. 46), inner plate with 4 plumose setae. Maxilliped (Fig. 49) inner plate with 2 apical and 3 sub-apical setae; outer plate with a row of 3 medial robust serrate setae, 9 naked setae and 3 apical stiff setae. Lateralia (Fig. 50) with 8 strong pectinate setae. Pereon. Coxal plates 1–4 (Figs 41, 42, 51, 52) shallow, subrectangular but plate 2 somewhat roundish. Gnathopod 1 (Fig. 41), carpus 0.3× as long as propodus, rastellate setae absent; propodus palm oblique, defining angle indistinct, palm with cutting margin crenulated, palm with 20 distally notched robust setae in two rows and 6 distally notched robust setae near defining angle; dactylus, inner margin dentate. Gnathopod 2 (Fig. 42), carpus 0.5× as long as propodus, with 3 rastellate setae; propodus palm oblique, defining angle indistinct, palm with cutting margin crenulated, palm with 20 distally notched robust setae in 2 rows and 4 distally notched robust setae near defining angle; dactylus similar to that of gnathopod 1. Pereopod 6 longer than pereopod 7. Pereopods 3 and 4 (Fig. 52) with a row of long setae on posterior margin; carpus as long as propodus. Coxal gill 7 absent. Ventral surface of pereonites 2–7 bearing sternal humps (blisters). Pleon. Epimera 1–3 (Fig. 40): posterior corners obtuse, armed with 1 stiff seta each; ventral margin of plate 1 without setae, plate 2 with 2 short setae and plate 3 with 3 short setae. Pleopods 1–3 (Fig. 56), peduncular articles with 2 coupling setae (retinaculae). Urosome (Fig. 3 B): urosomite 1, “ecdysial setae” absent. Uropod 1 (Fig. 36): peduncle with 7 setae on outer margin, 3 long seta on inner margin and with 2 basofacial setae; outer ramus 0.7× as long as inner ramus, about 70% length of peduncle; inner ramus armed with 6 setae on both margins and with 2 long setae on ventral face; outer margin of outer ramus armed; rami with 5–6 setae on apices, one of them very long. Uropod 2 (Fig. 37): peduncle with 4 setae on outer margin and 3 setae on inner margin; outer ramus 0.7× as long as inner ramus; inner ramus slightly longer than peduncle, armed with setae on both margins; outer margin of outer ramus armed; rami with 5 setae on apices, one or two of them longer. Uropod 3 (Fig. 38): uniramous; peduncle with 2 sets of stiff setae on distal margins; proximal article of outer ramus 2.5× as long as peduncle, bearing 6 sets of setae on inner and outer margins; terminal article 0.2× as long as proximal article, with 3 setae on apex. Telson (Fig. 39): 1.5× as long as uropod 3 peduncle; 0.3× longer than broad, emarginated; tips of lobes with 2 strong setae apically, one of them long. Oostegites 2–5 on gnathopod 2 and pereopods 3–5 (Figs 42, 52) sub-linear, unmatured without marginal setae.</p> <p>Male (4.2 mm, apparently immature), 11/7sd-IBSS, sexually dimorphic characters. Head. Antenna 2 (Fig. 57): peduncular articles 4 and 5 poorly setose; flagellum with 5 articles; calceoli absent. Pereon. Gnathopod 1 (Fig. 58): carpus with 1 rastellate seta; palm with 3 distally notched robust setae in 2 rows and 4 distally notched robust setae near defining angle. Gnathopod 2 (Fig. 59): propodus palm sub-transverse, defining angle distinct, palm with 3 distally notched robust setae in 2 rows and 3 distally notched robust setae near defining angle. Pereopods 3 and 4 with a row of long setae on posterior margin; carpus as long as propodus. Pleon. Uropod 1 (Fig. 60): peduncle with 1 basofacial seta. Uropod 2 (Fig. 61): peduncle weakly setose; rami without serrate robust setae. Uropod 3 (Fig. 62): proximal article of outer ramus bearing 4 sets of setae on inner and outer margins. Telson (Fig. 63): 2.0× as long as uropod 3 peduncle; 0.2× longer than broad.</p> <p>Variability. Slight variation in armature of outer rami of uropods 1 and 2 was observed, as well as a slightly different degree of telson emargination.</p> <p>Taxonomic comments. P. holsingeri, sp. nov. mostly resembles P. levanidovi and P. shikokunis by the shape and structure of gnathopods 1–2. The presence of calceoli on female antenna 2 creates an affinity to P. shikokunis. The shape and structure of uropod 3 with 4–6 sets of setae on the proximal article of outer ramus and short terminal article is similar in P. camtschaticus Birstein, 1855 and in P. asiaticus sensu Ueno, 1966. The distinct and narrow mandibular process of lower lip and expanded palmar margin of gnathopod 2 in male are unique features distinguishing P. holsingeri, sp. nov. from all known species of the genus.</p> <p>Distribution and ecology. P. holsingeri, sp. nov. known only from type locality. Stygobiont crustaceans Mackinia sp., Acanthocyclops sp. and Diacyclops sp. and several interstitial species of water mites were collected from this same locality.</p> </div>	https://treatment.plazi.org/id/F21A8787FF98F70CE6A6FD91FE3849D3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sidorov, Dmitry A.;Gontcharov, Andrey A.	Sidorov, Dmitry A., Gontcharov, Andrey A. (2013): Studies on subterranean amphipod crustaceans of Primory, Russia. Part 1. Three new species of the genus Pseudocrangonyx from springs and other groundwater habitats in far eastern Russia. Zootaxa 3693 (4): 547-567, DOI: 10.11646/zootaxa.3693.4.8
F21A8787FF9CF70CE6A6FBC8FB304DD1.text	F21A8787FF9CF70CE6A6FBC8FB304DD1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pseudocrangonyx kseniae Sidorov 2012	<div><p>Pseudocrangonyx kseniae Sidorov, 2012</p> <p>(Figs 3 D, 64–69)</p> <p>syn.: Pseudocrangonyx kseniae Sidorov, 2012, p. 30, figs 1–5, (orig. descrip.).</p> <p>Diagnosis (refined, cf. Sidorov, 2012, p. 31). Small-sized species with marked secondary sexual dimorphism. Dorsal surface of body segments smooth (Fig. 3 D), teretial, bearing detached fine setae. Eyes absent. Body unpigmented. Interantennal lobe of the head tapered; inferior antennal sinus distinct. Antenna 1 about 50% length of body. Palp mandible article 3 with 2 B-seta, 15 D-setae and 3 E-setae. Ventral surface of pereonites 2–7 with sternal humps (blisters). Pereopod 6 as long as pereopod 7. Urosome without “ecdysial setae”. Uropod 1 with 1 basofacial seta. Inner rami of male uropods 1–2 with serrate setae. Telson entire. Body length 4.2–5.7 mm (females), 4.2 mm (male).</p> <p>Material examined. Male (4.2 mm, fragment without head part), X38653 /Cr-1469-FEFU, Russia, Primory Territory, Lasovsky District, ~ 3 km E of Laso, Kievka River (43°22.160' N 133°55.485' E), 217 m above sea level, subterranean waters (hyporea), 3 Aug 2009, coll. D.A. Sidorov &amp; K.A. Semenchenko.</p> <p>Description. Male (4.2 mm, fragment), X38653 /Cr-1469-FEFU, sexually dimorphic characters. Pereon. Coxal plates 1–4 (Figs 64, 65) shallow, sub-rectangular but plate 2 somewhat roundish. Gnathopod 1 (Fig. 64), carpus 0.5× as long as propodus, rastellate setae absent; propodus palm sub-transverse, defining angle distinct, palm with cutting margin crenulated, palm with 4 distally notched robust setae in two rows and 8 distally notched robust setae near defining angle. Gnathopod 2 (Fig. 65), carpus 0.8× as long as propodus, rastellate setae absent; propodus palm sub-transverse, defining angle distinct, palm with cutting margin crenulated, palm with 5 distally notched robust setae in 2 rows and 4 distally notched robust setae near defining angle. Pereopods 3 and 4 with a row of long and short setae on posterior margin; carpus as long as propodus. Pleon. Uropod 1 (Fig. 66): outer ramus armed with 1 robust seta; inner ramus with 1 serrate seta on apex. Uropod 2 (Fig. 67): articles armed with knife-like strong setae; outer ramus armed with 1 robust seta; both rami bearing serrate setae sub-apically and apically. Uropod 3 (Fig. 68): proximal article of outer ramus 2.3× as long as peduncle, bearing 2 sets of setae on lateral margin. Telson (Fig. 69): 1.8× as long as uropod 3 peduncle; 0.3× longer than broad.</p> </div>	https://treatment.plazi.org/id/F21A8787FF9CF70CE6A6FBC8FB304DD1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sidorov, Dmitry A.;Gontcharov, Andrey A.	Sidorov, Dmitry A., Gontcharov, Andrey A. (2013): Studies on subterranean amphipod crustaceans of Primory, Russia. Part 1. Three new species of the genus Pseudocrangonyx from springs and other groundwater habitats in far eastern Russia. Zootaxa 3693 (4): 547-567, DOI: 10.11646/zootaxa.3693.4.8
F21A8787FF82F711E6A6FF6AFCE04DD3.text	F21A8787FF82F711E6A6FF6AFCE04DD3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pseudocrangonyx sympatricus Sidorov & Gontcharov	<div><p>Pseudocrangonyx sympatricus Sidorov &amp; Gontcharov, sp. nov.</p> <p>(Figs 3 C, 70–90)</p> <p>Diagnosis. Small-sized species, sexual dimorphism unknown. Dorsal surface of body segments smooth (Figs 3 C, 71), teretial, bearing detached fine setae. Eyes absent. Body unpigmented. Interantennal lobe of the head rounded, slightly tapered; inferior antennal sinus moderate (Fig. 70). Antenna 1 about 30% length of body. Palp mandible article 3 with 2 B-seta, 11 D-setae and 3 E-setae. Ventral surface of pereonites 2–7 with sternal humps (blisters). Pereopod 7 largest. Urosome without “ecdysial setae”. Uropod 1 with 1 basofacial seta. Telson emarginated. Body length 5.2–6.25 mm (females).</p> <p>Type locality. Russia, Far East, southeast part of the Sikhote-Alin Mountain Ridge, the Kievka River basin (43º22.160' N 133º55.485' E), subterranean waters (hyporea), 217 m above sea level.</p> <p>Material examined. Holotype: female (6.25 mm, oostegites undeveloped), X38655 /Cr-1471-FEFU, Russia, Primory Territory, Lasovsky District, ~ 3 km E of Laso, Kievka River (43º22.160' N 133º55.485' E), 3 Aug 2009, coll. D.A. Sidorov &amp; K.A. Semenchenko. Paratypes: 11/8sd-IBSS, sex unknown (4.5 mm); with same data as holotype. Closely with type locality, 15 Jun 2011, coll. D.A. Sidorov &amp; A.L. Sidorov, 2 females (5.7 mm, 5.2 mm, oostegites undeveloped).</p> <p>Etymology. The species name sympatricus (adj.) indicate to the sympatry of this species with the congeneric Pseudocrangonyx kseniae. Gender masculine.</p> <p>Description. Female (6.25 mm), X38655 /Cr-1471-FEFU. Head. Antenna 1 (Fig. 73): about 30% length of body, 60% longer than antenna 2; peduncular articles 1–3 in length ratio 1:0.9:0.4; primary flagellum with 17 articles; aesthetascs present. Antenna 2 (Fig. 74), peduncular articles 4 and 5 in lengths ratio 0.9:1; flagellum with 7 articles; calceoli absent. Left mandible (Fig. 81) incisor 5-dentate; lacinia mobilis 5-dentate; setal row with 4 serrate setae. Right mandible incisor 5-dentate; lacinia mobilis trifurcate. Molar process triturative, with accessory seta. Palp mandible article 3 63% longer article 2; article 3 with 2 B-seta, 11 D-setae and 3 E-setae. Lower lip (Fig. 83), inner lobes absent; mandibular process indistinct (roundish). Maxilla 1 (Fig. 79), inner plate with 3 plumose setae; outer plate with 7 serrate setae; palp article 2 about 3.7× longer than article 1 bearing 3 stiff setae on apex. Maxilla 2 (Fig. 80), inner plate with 4 plumose setae. Maxilliped (Fig. 84) inner plate with 2 short and 1 long simple setae apical and 4 plumose setae sub-apical; outer plate with a row of 7 medial robust setae two of them serrate, 3 apical long stiff setae. Pereon. Coxal plates 1–4 (Figs 85–87) shallow, sub-rectangular. Gnathopod 1 (Fig. 85), carpus 0.5× as long as propodus, rastellate setae absent; propodus palm oblique, defining angle indistinct, palm with cutting margin crenulated, palm with 10 distally notched robust setae in two rows and 6 distally notched robust setae near defining angle; dactylus, inner margin dentate, with 2 setae along outer margin. Gnathopod 2 (Fig. 86), carpus 0.7× as long as propodus, with 3 rastellate setae; propodus palm oblique, defining angle indistinct, palm with cutting margin crenulated, palm with 6 distally notched robust setae in 2 rows and 4 distally notched robust setae near defining angle; dactylus similar to that of gnathopod 1. Pereopods 3 and 4 (Fig. 87) with a row of long and short setae on posterior margin; carpus longer than propodus. Coxal gill 7 absent. Pereopod 7 (Figs 88, 89) longer than pereopod 6. Ventral surface of pereonites 2–7 bearing sternal humps (blisters). Pleon. Epimera 1–3 (Fig. 72): posterior corners obtuse, armed with 1 stiff seta each; ventral margin of plate 1 without setae, plate 2 with 2 setae and plate 3 with 2 setae. Pleopods 1–3 (Fig. 90), peduncular articles with 2 coupling setae (retinaculae). Urosome (Figs 3 C, 71): urosomite 1, “ecdysial setae” absent. Uropod 1 (Fig. 75): peduncle with 6 setae on outer margin, 4 setae on inner margin two of them couple and very long, 1 basofacial seta; outer ramus 0.7× as long as inner ramus, about 60% length of peduncle; inner ramus armed with 6 setae on both margins and with 2 long setae on ventral face; outer margin of outer ramus armed; rami with 5–6 setae on apices, one or two of them very long. Uropod 2 (Fig. 76): peduncle with 3 setae on outer margin and 4 setae on inner margin two of them couple; outer ramus 0.6× as long as inner ramus; inner ramus 1.4× longer peduncle, armed with setae on both margins; outer margin of outer ramus unarmed; rami with 4 setae on apices, one of them long. Uropod 3 (Fig. 77): uniramous; peduncle with 1 set of stiff setae on distal margin; proximal article of outer ramus 2.4× as long as peduncle, bearing 6 sets of setae on inner and outer margins; terminal article 0.2× as long as proximal article, with 3 setae on apex. Telson (Fig. 78): 1.2× as long as uropod 3 peduncle; 0.2× longer than broad, emarginated; tips of lobes with 2 strong setae apically, one of them long. Oostegites 2–5 on gnathopod 2 and pereopods 3–5 unmatured (barely visible), without marginal setae.</p> <p>Male. Unknown.</p> <p>Variability. The species is not extremely variable. The character of variability of outer rami of uropods 1 and 2 is common with above described species.</p> <p>Taxonomic comments. P. sympatricus, sp. nov. is distinguished from sympatric P. kseniae by the following characteristics (characteristics of the latter in parentheses): inteantennal lobe obtuse (truncate); antenna 1 about 30% length of body (50%); antenna 2 about 0.4x shorter than antenna 1 (0.5x); peduncular articles 4, 5 of antenna 2 in length ratio 1:0.9 (1:0.5); gland cone of antenna 2 tapered (obtuse); serrate setae on outer plate of maxilliped present (absent); maxilla 2 with 4 plumose setae in oblique row (2 setae); vestigial inner lobes of lower lip absent (present); female gnathopod 1 with 6 notched setae at defining angle (9 setae); pereopod 7 longer than pereopod 6 (shorter); distal margin of epimeron 1 armed (unarmed); uropod 3 with 6 sets of setae (with 2 sets); outer rami of uropods 1, 2 in female armed (unarmed); telson 1.2× as long as uropod 3 peduncle (1.8× – 2.0×); telson emarginated (entire).</p> <p>P. sympatricus, sp. nov. resembles P. korkishkoorum by distinctly short palp article 2 of mandible. The shape and structure of uropod 3 with 6 sets of setae on the proximal article of outer ramus and short terminal article is similar in P. shikokunis and P. asiaticus sensu Ueno, 1966. The character setation of inner and outer plates of maxilliped and longer pereopod 7 are unique features distinguishing P. sympatricus, sp. nov. from all known species of the genus.</p> <p>Distribution and Ecology. Known only from type locality, where it occurs together with P. kseniae. Stygobiont crustaceans Paramoera (Ganigamoera) myslenkovi Sidorov, 2010, Asellus sp., Mackinia sp., Acanthocyclops orientalis Borutzky, 1966, Diacyclops sp., Diacyclops ex gr “ languidoides ” and several interstitial species of water mites were collected from this same locality.</p> </div>	https://treatment.plazi.org/id/F21A8787FF82F711E6A6FF6AFCE04DD3	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Sidorov, Dmitry A.;Gontcharov, Andrey A.	Sidorov, Dmitry A., Gontcharov, Andrey A. (2013): Studies on subterranean amphipod crustaceans of Primory, Russia. Part 1. Three new species of the genus Pseudocrangonyx from springs and other groundwater habitats in far eastern Russia. Zootaxa 3693 (4): 547-567, DOI: 10.11646/zootaxa.3693.4.8
