identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
AC04781F22257F35E57271D814EBF983.text	AC04781F22257F35E57271D814EBF983.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Aoridae Stebbing 1899	<div><p>Family Aoridae Stebbing, 1899</p> <p>[Japanese name: Yumbo-sokoebi-ka] Genus Aoroides Walker, 1898 [Japanese name: Yumbo-sokoebi-zoku]</p> <p>Aoroides Walker, 1898: 284; Myers 1988: 187; Barnard and Karaman 1991: 171; Myers and Lowry 2003: 465; Ariyama 2004a: 1.</p> <p>Type species. Aoroides columbiae Walker, 1898, fixed by monotypy.</p> <p>Diagnostic description [emended from Barnard and Karaman (1991) and Ariyama (2004a)]. Body laterally compressed, smooth; urosomites free. Head, rostrum short, ocular lobes short; eyes small to large. Antenna 1 long, slender, peduncular article 3 shorter than article 1, accessory flagellum vestigial or absent; antenna 2 shorter than antenna 1, flagellum short, with 2–4 articles. Mandible, palp weak, slender, with 3 articles, article 3 longest, rod-shaped, with 1–7 setae [palp lacking in A. vitiosus Myers, 1995 (Myers 1995)]; left molar traversed with parallel channels. Maxilla 1, inner plate triangular or conical, with apical seta; outer plate with 10 apical robust setae; palp biarticulate, with several robust setae distally. Maxilla 2, outer plate broader than inner plate, both plates with row of marginal setae. Maxilliped, inner plate with several robust setae distally; outer plate reaching apex of palp article 2, with 7–12 marginal robust setae; palp consisting of 4 articles, article 3 with distal projection, article 4 bearing robust seta (nail) on tip. Male coxa 1 elongate, produced forward, usually with robust seta anteriorly, male coxae 2–7 and all coxae in female ordinary to short, weakly overlapping; gills present on coxae 2–6; oostegites of female broad, present on coxae 2–5. Male gnathopod 1 greatly enlarged, merochelate; basis long, excavated anterodistally; merus produced into long distal tooth; carpus long and broad; propodus shorter than carpus; dactylus slender. Female gnathopod 1 smaller than that of male, subchelate; carpus shorter than or subequal to propodus, palm angular or oblique. Gnathopod 2 of both sexes smaller than gnathopod 1, subchelate; propodus shorter than or as long as carpus in male, longer than or subequal to carpus in female, palm oblique or almost transverse. Pereopods 3, 4 similar to each other, slender; bases elongate. Pereopods 5–7 similar to each other, progressively longer; bases usually broad. Epimeral plates 1–3 each with notch on ventroposterior corner. Uropods biramous; uropod 1 peduncle shorter than or same length as rami, distal end of peduncle with long inter-ramal process, both rami subequal in length; uropod 2 shorter than uropod l, peduncle shorter than rami, rami subequal in length; uropod 3 shortest, peduncle relatively elongate, rami subequal in length, outer ramus with tiny second article. Telson entire, fleshy, with pair of hooked cusps.</p> <p>Remarks. Main points of the emendation are as follows: eyes “small to large” from “small” because of the large eyes in Aoroides macrops sp. nov., and mandibular palp with “1–7 setae” from “2–7 setae” because of 1 or 2 setae in A. macrops.</p> </div>	https://treatment.plazi.org/id/AC04781F22257F35E57271D814EBF983	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.		Plazi	Ariyama, Hiroyuki;Kawabe, Katsutoshi	Ariyama, Hiroyuki, Kawabe, Katsutoshi (2022): Two New Species of Aoridae from Chichijima Island, the Ogasawara Islands in Japan (Crustacea: Amphipoda). Species Diversity 27 (1): 113-128, DOI: 10.12782/specdiv.27.113, URL: http://dx.doi.org/10.12782/specdiv.27.113
AC04781F22257F33E7A27493158FF940.text	AC04781F22257F33E7A27493158FF940.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Aoroides macrops Ariyama & Kawabe 2022	<div><p>Aoroides macrops sp. nov.</p> <p>[New Japanese name: Ōme-burabura-sokoebi] (Figs 2–5, 6A; Table 1)</p> <p>Material examined. Holotype: male (OMNH-Ar-12315), 2.7mm, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=142.19861&amp;materialsCitation.latitude=27.096668" title="Search Plazi for locations around (long 142.19861/lat 27.096668)">Futami Fishing Port</a>, Chichijima Island, Ogasawara Islands, Tokyo Prefecture (Fig. 1A), Japan, 27°05′48″N, 142°11′55″E, 1–1.5 m depth, attached to fish cage, 11 July 2020, coll. K. Kawabe. Paratypes: 6 males (OMNH- Ar-12316–12321), 3.2, 2.9, 2.8, 2.7, 2.4, and 2.3 mm, respectively (OMNH-Ar-12318 not dissected), and 2 ovigerous females (OMNH-Ar-12322, 12323), 2.9 and 2.8 mm, respectively, same data as holotype.</p> <p>Material for comparison. Aoroides longimerus Ren and Zheng, 1996: three males (OMNH-Ar-4235, 4237, 4241), 4.2, 3.6, and 3.1 mm, respectively, examined in Ariyama (2004a).</p> <p>Type locality. Futami Fishing Port, Chichijima Island, Ogasawara Islands, Tokyo Prefecture, Japan.</p> <p>Etymology. A compound noun in apposition from the Ancient Greek macro (=large)+ ops (=eye), referring to the size of eyes.</p> <p>Description of male. Based on holotype (OMNH- Ar-12315, 2.7 mm).</p> <p>Head (Figs 2, 3). Eyes large (diameter: 35% of head length). Antenna 1, peduncular articles 1–3 with length ratio of 1.0: 1.0: 0.4, article 1 stout, ventral margin with 4 long robust setae; accessory flagellum vestigial, 1-articulate, with 3 setae on tip; flagellum with 13 articles, last article short, articles 4–11 each bearing aesthetasc at posterodistal end. Antenna 2 shorter than antenna 1 (about 0.85 times), stout, setose posteriorly; peduncular articles 3–5 with length ratio of 1.0: 2.4: 2.3; flagellum with 3 articles, article 1 with 1 thick and 2 robust setae, articles 2, 3 each bearing 2 robust setae posteriorly. Upper lip, ventral margin rounded, with many short thin setae. Mandibles with left and right incisors bearing 6 cusps; left lacinia mobilis 4-toothed and right one bifid, left accessory blades 3 in number and right ones 2; article length ratio of palp 1.0: 1.55: 2.2, articles 1, 2 bare, article 3 with 1 or 2 long distal setae. Lower lip with short mandibular process, medial margin of outer lobe with several apical setae and many short thin setae, distal margin of inner lobe bearing short thin setae. Maxilla 1 with small inner plate bearing single long seta; outer plate with 10 stout robust setae apically; tip of palp article 2 with 6 distal robust setae and 3 simple setae. Maxilla 2, outer plate setose distally, inner plate with many setae on distal to medial margins. Maxilliped with inner plate bearing 4 small robust setae and several plumose setae; outer plate broad, distomedial margin with 7 robust setae; palp stout, weakly setose, dorsodistal end of article 3 projected, article 4 with nail on tip.</p> <p>Pereon (Fig. 4). Gnathopod 1 large; coxa depressed triangular, bearing 6 plumose and 1 thick setae on anterior margin; basis long, anterior and lateral margins with dense plumose setae, posterior margin bare; ischium short, anterior and lateral margins with several plumose setae distally; merus lanceolate, distal 3/4 surfaces (lateral–posterior–medial) covered with dense plumose setae; carpus roundish rectangular, anterior and posterior margins and medial surface bearing dense plumose setae; propodus almost straight, about 0.8 times as long as carpus, posterodistal corner notched, anterior margin and anterodistal corner with 1 and 2 simple setae, respectively, posterior margin with several simple setae, medial surface bearing dense plumose setae; dactylus long, strongly curved, posterior margin smooth, with several simple setae. Gnathopod 2 small; coxa roundish square, ventral margin with a few setae; basis long, anterior margin with many long simple setae, posterior margin with a few short setae; meus setose posterodistally; carpus longish triangular, posterior margin setose; propodus almost same length as carpus, palm slightly oblique, defined by long robust seta, posterior margin and medial surface setose; dactylus curved, posterior margin with 6 denticles. Pereopods 3, 4 slightly shorter than gnathopod 2; coxae roundish square; bases anterior and posterior margins bearing several and a few setae, respectively; meri and carpi short (length/width ca. 1.7 in carpi), posterior margins without robust setae; propodi long; dactyli short. Pereopod 5 longer than pereopod 4; coxa bilobed; basis wide, posteroproximal corner a little projected roundly, anterior margin with 4 short robust setae, posterior margin with several setae; carpus with 1 posterolateral and 3 posterodistal robust setae; propodus anterior margin bearing 1, 2, 1, 4 robust setae, posterodistal corner setose. Pereopod 6 about 5/4 times as long as pereopod 5; coxa bilobed; basis wide, posteroproximal corner slightly projected roundly, anterior margin with 5 short robust setae, posterior margin with several setae; carpus with 1 posterolateral and 2 posterodistal robust setae; propodus anterior margin bearing 1, 2, 3, 3, 2 robust setae, posterodistal corner setose. Pereopod 7 about 5/4 times length of pereopod 6; coxa roundish; basis wide, posteroproximal corner angularly projected, anterior margin with 2 short robust setae, posterior margin with 5 setae; carpus medial surface with 1, 2, 3 robust setae; propodus anterior margin bearing 1, 1, 1, 2, 1 robust setae, posterodistal corner setose.</p> <p>Pleon (Fig. 5). Epimeral plates 1–3 each with small projection and short seta on posteroventral corner, ventral margins bare (Fig. 2). Pleopods length 2&gt;1&gt;3; peduncles with 4, 4, 3 plumose setae in pleopods 1–3, respectively; outer rami shorter than inner rami, both rami with 7, 6, 6 articles, respectively. Uropod 1, peduncle with 1 basofacial, 3 dorsolateral and 2 dorsomedial robust setae, inter-ramal process long, 42% length of peduncle; outer ramus same length as peduncle, inner ramus about 1.1 times as long as peduncle, former with 2 dorsolateral, 1 dorsomedial and 4 terminal robust setae, latter bearing 3 dorsomedial and 4 terminal robust setae. Uropod 2, peduncle with 2 dorsolateral and 1 dorsomedial robust setae, inter-ramal process short, 7% length of inner ramus; outer ramus almost same length as peduncle, inner ramus ca. 1.35 times as long as peduncle, former with 1 dorsolateral, 1 dorsomedial and 4 terminal robust setae, latter bearing 1 dorsolateral, 3 dorsomedial and 4 terminal robust setae. Uropod 3, peduncle with 1 medioproximal and 2 laterodiatal robust setae, inter-ramal process short, 10% length of peduncle; both rami almost same length as peduncle, outer ramus with marginal robust seta in middle, tip bearing 1 robust seta, 2 long thick setae and several simple setae, inner ramus bearing marginal robust seta and long thick apical seta. Telson roundish pentagonal, distal margin with pair of 2 simple and 1 sensory setae, lateral margins each with 2 sensory setae.</p> <p>Description of female [based on paratype (OMNH- Ar-12322, 2.9 mm)]. Generally similar to male holotype except for gnathopods and oostegites. Gnathopod 1 (Fig. 5 F-G1) weakly setose; coxa trapezoidal, without plumose setae; basis relatively short, stout, anterior margin with a few short setae; merus and carpus, posterior margins setose; propodus about 1.1 times length of carpus, posterior margin and medial surface setose, palm oblique, defined by long robust seta; dactylus weakly curved, posterior margin with 4 denticles. Gnathopod 2 (Fig. 5 F-G2), coxa large, roundish square, ventral margin with a few setae; basis relatively long, anterior and posterior margins each with a few short setae; meus setose posterodistally; carpus triangular, posterior margin setose; propodus ca. 1.1 times length of carpus, palm slightly oblique, defined by long robust seta, posterior margin and medial surface setose; dactylus curved, posterior margin with 4 denticles.</p> <p>Variation. Gnathopod 1: large male (paratype, OMNH- Ar-12316, 3.2 mm; Fig. 5 LgM-G1), carpus more slender than that of holotype (Fig. 4G 1); small male (paratype, OMNH-Ar-12321, 2.3 mm; Fig. 5 SM-G1), propodus roundish, posterior margin of dactylus with 3 denticles. Numbers of robust setae on uropod 3 rami (Table 1): outer ramus usually with 1 marginal and 1 terminal robust setae in large males and females; inner ramus with 1 marginal robust seta in large males and with 1–2 marginal and 1 terminal robust setae in large females.</p> <p>Coloration of specimen 3 days after fixation [based on paratype, male (OMNH-Ar-12318, 2.8 mm) (Fig. 6A)]. Eyes dark red; anterior part of pereonite 1 and posterior parts of pereonites 1–7 and pleonites 1, 2 each with reddish brown line, anterior surface of upper lip and anterodorsal and posteroventral margins of coxa 1 also reddish brown; other body and appendages translucent or white.</p> <p>Remarks. The present specimens are similar only to Aoroides longimerus in the heavily setose male gnathopod 1, the coxa of which bears several plumose setae anteriorly, and the uropod 2 with a short inter-ramal process. This species was originally described from China (Ren and Zheng 1996), recorded from Osaka and Wakayama Prefectures in Japan (Ariyama 2004a), and introduced to the western and northern coasts of France (Gouillieux et al. 2016; Dauvin et al. 2020). However, A. macrops sp. nov. can be distinguished from the Japanese specimens of A. longimerus by (1) larger eyes (diameter less than 30% of head length in A. longimerus), (2) shorter peduncular article 4 of the antenna 2 (length/BL 0.11–0.12, but ca. 0.14 in A. longimerus), (3) shorter carpus of the male gnathopod 1 (length/BL 0.13– 0.16, but 0.19–0.21 in A. longimerus), (4) shorter carpi of the pereopods 3 and 4 (length/width 1.9–2.3 in A. longimerus), and (5) single marginal robust seta each on the uropod 3 rami (usually 2 or 3 in A. longimerus). The body coloration is also different (color paler, reddish brown line on pereonite 6 absent in A. longimerus). The original description of A. longimerus shares (2)–(4) with the Japanese specimens (Ren and Zheng 1996). But regarding (1) and (5), although there are no descriptions in the text, large eyes and a single marginal robust seta on the uropod 3 rami are shown in their fig. 2-1 and fig. 2-9, respectively. Chinese specimens should be investigated in detail for comparison with this new species.</p> <p>1 “X+Y” indicates X marginal and Y terminal robust setae.</p> <p>Habitat. Shallow subtidal, attached to fish cage.</p> <p>Distribution. Japan: Chichijima Island, the Ogasawara Islands in Tokyo Prefecture (present study).</p></div> 	https://treatment.plazi.org/id/AC04781F22257F33E7A27493158FF940	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.		Plazi	Ariyama, Hiroyuki;Kawabe, Katsutoshi	Ariyama, Hiroyuki, Kawabe, Katsutoshi (2022): Two New Species of Aoridae from Chichijima Island, the Ogasawara Islands in Japan (Crustacea: Amphipoda). Species Diversity 27 (1): 113-128, DOI: 10.12782/specdiv.27.113, URL: http://dx.doi.org/10.12782/specdiv.27.113
AC04781F22237F3CE7EA745213BFFBFA.text	AC04781F22237F3CE7EA745213BFFBFA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Grandidierella Coutiere 1904	<div><p>Genus Grandidierella Coutière, 1904</p> <p>[Japanese name: Dorosokoebi-zoku]</p> <p>Grandidierella Coutière, 1904: 166; Barnard and Karaman 1991: 194; Myers and Lowry 2003: 465; Ariyama 2020: 3.</p> <p>Neomicrodeutopus Schellenberg, 1925: 168.</p> <p>Grandidierella (Bigrandidierella) Karaman, 1985: 37.</p> <p>Propejanice Myers and Desiderato, 2019: 288.</p> <p>Type species. Grandidierella mahafalensis Coutière, 1904, fixed by monotypy.</p> <p>Diagnostic description [emended from Ariyama (2020)]. Body subcylindrical, slightly depressed laterally,</p> <p>smooth; urosomites free. Head, rostrum short, ocular lobes short; eyes small to large. Antenna 1 elongate, slender, peduncular article 3 much shorter than article 1, accessory flagellum 1–2 articulate; antenna 2 stouter than antenna 1, flagellum shorter than peduncular article 5. Mandible, palp with 3 articles, article 3 clavate or rectolinear. Maxilla 1 with vestigial inner plate; outer plate with ca. 10 robust setae; palp biarticulate, with several robust setae at tip. Maxilla 2, inner plate usually with mediofacial row of setae. Maxilliped, inner plate with several robust setae distally; outer plate not reaching apex of palp article 2, with many marginal robust setae; palp consisting of 4 articles, article 4 with short robust seta (nail). Coxae small, relatively shallow, slightly or not overlapping; gills present on coxae 2–6; oostegites of female broad, present on coxae 2–5. Male gnathopod 1 greatly enlarged, carpochelate; carpus dilated, propodus short. Female gnathopod 1 smaller than that of male, subchelate, palm oblique. Gnathopod 2 of both sexes smaller than gnathopod 1, subchelate; propodus shorter than or almost same length as carpus, palm transverse. Pereopods 3, 4 similar to each other, slender; bases elongate. Pereopods 5–7 similar to each other, pereopod 5 much shorter than pereopods 6, 7; basis of pereopod 7 setose posteriorly. Uropods 1, 2 biramous, uropod 1 longer than uropod 2, peduncles usually longer than both rami; uropod 3 uniramous, peduncle usually shorter than single ramus, dilated medially. Telson entire, short, fleshy, with pair of hooked apical cusps.</p> <p>Remarks. Main points of the emendation are as follows: eyes “small to large” from “small to medium” because of the large eyes in Grandidierella ogasawarensis sp. nov., and peduncles of uropods 1, 2 “usually longer than both rami” from “longer than both rami” because of the inner ramus of uropod 2 almost same length as peduncle in G. ogasawarensis.</p> </div>	https://treatment.plazi.org/id/AC04781F22237F3CE7EA745213BFFBFA	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.		Plazi	Ariyama, Hiroyuki;Kawabe, Katsutoshi	Ariyama, Hiroyuki, Kawabe, Katsutoshi (2022): Two New Species of Aoridae from Chichijima Island, the Ogasawara Islands in Japan (Crustacea: Amphipoda). Species Diversity 27 (1): 113-128, DOI: 10.12782/specdiv.27.113, URL: http://dx.doi.org/10.12782/specdiv.27.113
AC04781F222C7F3AE7E072EA1336FA05.text	AC04781F222C7F3AE7E072EA1336FA05.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Grandidierella ogasawarensis Ariyama & Kawabe 2022	<div><p>Grandidierella ogasawarensis sp. nov.</p> <p>[New Japanese name: Ogasawara-dorosokoebi] (Figs 6B, 7–10; Tables 2, 3)</p> <p>Aoridae sp.: Hamabe 2017: 63, fig. 3B.</p> <p>Material examined. Holotype: male (OMNH-Ar-12324), 5.0 mm, mouth of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=142.19806&amp;materialsCitation.latitude=27.098612" title="Search Plazi for locations around (long 142.19806/lat 27.098612)">Kiyose River</a>, Chichijima Island, Ogasawara Islands, Tokyo Prefecture (Fig. 1B), Japan, 27°05′55″N, 142°11′53″E, intertidal, under stones, 11 July 2020, coll. K. Kawabe. Paratypes: 2 males (OMNH- Ar-12325, 12326), 4.5 and 3.6 mm, respectively, and 2 females (OMNH-Ar-12327, 12328), 5.4 and 5.1 mm, respectively, same data as holotype. Non-type: male (OMNH- Ar-12329, ASAO-A.17002), ca. 5.5 mm (damaged), same locality and habitat, 5 January 2017, coll. K. Hamabe.</p> <p>Material for comparison. Grandidierella rubroantennata Ariyama and Taru, 2017: holotype, male (OMNH- Ar-3847), 9.0 mm, and paratypes, 2 males (OMNH- Ar-3848, 3849), 7.6 and 8.4 mm, respectively, and 2 females (OMNH-Ar-3850, 3851), both 8.8 mm, examined in Ariyama (1996); paratypes, 1 male (OMNH-Ar-10334), 6.2 mm, and 2 females (OMNH-Ar-10335, 10296), 5.6 and 7.2 mm, respectively, examined in Ariyama and Taru (2017); nontypes: 1 male (OMNH-Ar-12330), 5.4 mm, and 1 female (OMNH-Ar-12331), 5.5 mm, intertidal zone of Toyokunizaki coast in Misaki, Osaka Prefecture, 34°19′21″N, 135°07′00″E, under stones, 5 June 2005, coll. H. Ariyama; 1 male (OMNH-Ar-12332), 5.2 mm, same locality and habitat, 12 June 2012, coll. H. Ariyama.</p> <p>Type locality. Mouth of Kiyose River, Chichijima Island, Ogasawara Islands, Tokyo Prefecture, Japan.</p> <p>Etymology. Referring to the type locality.</p> <p>Description of male. Based on holotype (OMNH- Ar-12324, 5.0 mm) and paratype (OMNH-Ar-12325, 4.5 mm) only for pereopod 7.</p> <p>Head (Figs 7, 8). Eyes large (diameter: 33% of head length). Antenna 1 slender, peduncular articles 1–3 with length ratio of 1.0: 1.25: 0.55, article 1 stout, ventral margin with 5 robust setae; accessory flagellum short, 1-articulate, with 4 setae apically; flagellum with 9+ articles (tip lost), articles 2, 4, 6–8 each bearing aesthetasc at posterodistal end. Antenna 2 slightly stouter than antenna 1; peduncular articles 3–5 with length ratio of 1.0: 2.5: 2.8, article 3 with 3 medial and 1 ventral robust setae, article 4 bearing 4 medial and 2 ventral robust setae; flagellum with 7 articles, terminal article minute, article 3–6 with 1, 1, 1, 2 robust setae, respectively. Upper lip subrounded ventrally, ventral margin bearing many thin setae. Mandibles, left and right incisors with 4 and 5 cusps, respectively; left lacinia mobilis 4-toothed and right one 3-toothed, left accessory blades 9 in number and right ones 8; palp stout, article length ratio 1.0: 1.1: 1.35, article 1 with 2 short setae, article 2 with 7 setae, article 3 clavate, bearing many slender setae and 1 thick seta. Lower lip with short mandibular process, outer lobe with 2 bundle of setae, 1 thick seta and many thin setae, inner lobe bearing many short thin setae on apical margin. Maxilla 1 with bare, rounded inner plate; outer plate with 9 distal robust setae; palp article 2 bearing 6 robust and 4 slender setae apically. Maxilla 2, inner plate with distal and medial setae and mediofacial row of setae, outer plate setose on distal margin. Maxilliped with inner plate bearing 3 quadrate, 1 curved and 1 slender robust setae; outer plate with 11 long-to-short robust setae mediodistally; palp slender, article 2 long, with many medial setae, article 3 setose distally, article 4 bearing dorsal thick seta and apical nail.</p> <p>Pereon (Fig. 9). Ventral surface lacking process. Gnathopod 1 very large; coxa trapezoidal, with short seta ventrally; basis wide, lateral surface with ridge, posterior margin convex, posterodistal corner with 2 setae; ischium short, posterodistal corner not projected, with short seta; merus posterodistal corner lacking projection, with several setae; carpus ovoid, length excluding teeth ca. 1.45 times width, distal margin with triangular tooth, posterodistal corner with long acute tooth, distance between teeth relatively broad, anterior margin bearing sparse short setae, posterior margin and posteromedial surface weakly setose; propodus curved, about 0.8 times as long as carpus, anterodistal corner with small projection, posterodistal corner a little swollen roundly, with several setae; dactylus short, triangular, posterior margin with 2 denticles. Gnathopod 2 slender; coxa trapezoidal; basis slender, slightly curved anteriorly, anterodistal corner without “nipple” sensu Barnard (1977), posterior margin with a few short setae; merus short, distal margin setose; carpus long, posterior margin heavily setose; propodus short, about half length of carpus, posterodistal corner with single robust seta; dactylus short, curved posteriorly, posterior margin with 2 denticles. Pereopods 3, 4 slightly shorter than gnathopod 2; coxae trapezoidal; bases long; meri rectangular, weakly setose; carpi short; propodi and dactyli narrow. Pereopod 5 shorter than pereopod 4; coxa bilobed, with 2 simple setae; basis roundish rectangular, posteroproximal corner roundly projected, anterior margin with several setae (robust in part), posterior margin with 4 medial plumose setae and 3 robust and 2 simple setae; merus with 2 long thick setae posteriorly; carpus bearing 2 posterolateral and 1 posterodistal robust setae; propodus anterior margin bearing 5 robust setae, posterodistal corner with 2 long thick setae; dactylus short. Pereopod 6 ca. 1.45 times as long as pereopod 5; coxa short, bilobed, with 2 plumose, 2 robust and 1 simple setae; basis rectangular, posteroproximal corner roundly projected, anterior margin with lateral plumose seta and 4 robust setae, anterodistal corner bearing 1 thick and 1 simple setae, posterior margin with 11 plumose setae (2 lateral and 9 medial) and 3 robust and 2 simple setae; merus posterior margin with 5 long thick setae, posterodistal corner bearing 1 thick (damaged) and 1 robust setae; carpus with 5 lateral robust setae; propodus with 8 anterior robust setae, posterodistal corner setose. Pereopod 7 a little longer than pereopod 6 in paratype (OMNH-Ar-12325, 4.5 mm); coxa short, slightly bilobed, with 1 plumose and 2 robust setae; basis rectangular, posteroproximal corner a little projected, anterior margin with 5 robust setae, anterodistal corner with 1 robust and 1 simple setae, posterior margin bearing 10 plumose setae (3 lateral and 7 medial) and 7 robust and 1 simple setae; merus posterior margin with 4 long thick setae, posterodistal corner bearing 1 robust and 1 long thick setae; carpus posterolateral surface with 3 robust setae, posterodistal corner bearing 1 robust and 1 long thick setae; propodus anterior margin with 5 robust setae, posterior margin bearing long thick seta, posterodistal corner setose.</p> <p>Pleon (Fig. 10). Epimeral plates 1–3 rounded posteroventrally, each with robust seta, ventral margins bare (Fig. 7). Pleopods length 2&gt;1&gt;3; peduncles with 12, 5, 10 plumose setae in pleopods 1–3, respectively; outer rami shorter than inner rami, outer rami with 9, 9, 8 articles, respectively, inner rami with 8 articles. Uropod 1 stout; peduncle with 3 dorsolateral and 5 dorsomedial robust setae, ventrodistal end with short inter-ramal process (15% length of peduncle); both rami shorter than peduncle, outer ramus a little shorter than inner ramus, former with 4 dorsolateral, 1 dorsomedial and 4 terminal robust setae, latter bearing 3 dorsolateral, 3 dorsomedial and 5 terminal robust setae. Uropod 2 short, about 0.6 times as long as uropod 1; peduncle dorsal surface with 1 lateral, 1 laterodistal, 1 medial and 1 mediodistal robust setae; inner ramus almost same length as peduncle, outer ramus shorter than inner ramus, former with 2 dorsolateral, 2 dorsomedial and 4 terminal robust setae, latter bearing 2 dorsolateral and 4 terminal robust setae. Uropod 3 about half length of uropod 2; peduncle slightly wider than long, swollen medially, with 2 dorsal setae; single ramus ca. 1.75 times length of peduncle, with tiny second article and 2 lateral, 2 medial and 5 terminal setae. Telson wider than long, laterodistal corners each with 3 setae, lateral margins each with 2 sensory setae.</p> <p>Description of female [based on paratype (OMNH- Ar-12327, 5.4 mm)]. Generally similar to male holotype except for gnathopods and oostegites. Gnathopod 1 (Fig. 10 F-G1), coxa trapezoidal; basis relatively stout, posterodistal corner with a few setae; ischium and merus short, both lacking projection, distal margin of merus setose; carpus wide, posterior margin heavily setose; propodus a little shorter than carpus, posterior margin with 4 robust setae; dactylus slightly curved posteriorly, posterior margin with 4 denticles. Gnathopod 2 (Fig. 10 F-G2), coxa trapezoidal; basis straight; merus short, distal margin setose; carpus shorter than that of male, posterior margin heavily setose; propodus short, about 0.9 times as long as carpus, posterodistal corner and posterior margin each with 2 robust setae; dactylus short, curved posteriorly, posterior margin with 4 denticles.</p> <p>Variation. Antenna 1: medium-sized male (paratype, OMNH-Ar-12325, 4.5 mm), flagellum with 16 articles, terminal article minute; small male (paratype, OMNH- Ar-12326, 3.6 mm), flagellum with 12 articles, terminal article minute. Antenna 2: medium-sized male, flagellum with 8 articles, terminal article minute; small male, flagellum with 6 articles, terminal article minute. Gnathopod 1: large male (paratype, OMNH-Ar-12329, ca. 5.5 mm) and mediumsized male, almost same as that of holotype (Fig. 9G 1); small male (Fig. 10 SM-G1), teeth on carpus closer each other, propodus wider than that of holotype, dactylus with 2 posterior denticles. Gnathopod 2: medium-sized male, almost same as that of holotype, but posterodistal corner and posterior margin of propodus with 2 and 1 robust setae, respectively, dactylus with 3 posterior denticles; small male (Fig. 10 SM-G2), almost similar to paratype female (Fig. 10 F-G2), but posterodistal corner and posterior margin of propodus with 2 and 1 robust setae, respectively, dactylus with 3 posterior denticles. Numbers of plumose setae on pereopods 5–7 (Table 2, upper part): plumose setae on coxae present in female pereopod 5 and pereopods 6, 7 of both sexes; those on basis anterior margins present in pereopods 6 of both sexes and female pereopod 7; those on basis posterior margins present in pereopods 5–7 of both sexes.</p> <p>Coloration of specimen 3 days after fixation [based on paratype, male (OMNH-Ar-12325, 4.5 mm) (Fig. 6B)]. Eyes brown; head, pereonites and pleonites light brown; peduncular articles 2, 3 and flagellum of antenna 1 and flagellum of antenna 2 pale red, peduncular articles 4, 5 of antenna 2 pale orange proximally and white distally; other appendages whitish.</p> <p>1 Coxa. 2 Basis anterior margin. 3 Basis posterior margin. 4 “X+Y” indicates X lateral and Y medial plumose setae. 5 Unknown owing to loss of coxa or basis.</p> <p>1 Basis posterior margin. 2 Coxa. 3 Basis anterior margin.</p> <p>Remarks. The present specimens are characterized by (1) male gnathopod 1 with 2 teeth on the carpus and an anterodistal projection on the propodus, (2) male gnathopod 2 with an elongate carpus, and (3) uropod 1 bearing an inter-ramal process. Only three species in the genus Grandidierella possess all of these characters: G. koa Barnard, 1977 from Hawaii; G. insulae Myers, 1981 from Lord Howe Island in Australia; and G. rubroantennata from Osaka, Wakayama and Chiba Prefectures in Japan (Barnard 1977; Myers 1981; Ariyama and Taru 2017). However, the present specimens are apparently different from these species in several characters (Table 3); therefore, we establish G. ogasawarensis as a new species herein. This species can be clearly distinguished by the male gnathopod 1 carpus with two teeth separated each other, whereas the teeth are close each other in the related species. Grandidierella ogasawarensis sp. nov. is most similar to G. rubroantennata from Japan; however, the former differs from the latter in the smaller body, the larger eyes (diameter: about 0.2 times of head length in G. rubroantennata), and the setation of the pereopods 5–7. On the setation of G. rubroantennata, reexamination of the specimens examined in Ariyama (1996) and Ariyama and Taru (2017) reveals that several plumose setae were overlooked in the previous studies, so the setation of them is described correctly in this study (Table 2, lower part). According to the table, lateral plumose setae occur on the both margins of the pereopod 6 basis and the posterior margin of the pereopod 7 basis in males of G. ogasawarensis, while they never occur in males of G. rubroantennata.</p> <p>Habitat. Intertidal, under stones at river mouth.</p> <p>Distribution. Japan: Chichijima Island, the Ogasawara Islands in Tokyo Prefecture (present study).</p></div> 	https://treatment.plazi.org/id/AC04781F222C7F3AE7E072EA1336FA05	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.		Plazi	Ariyama, Hiroyuki;Kawabe, Katsutoshi	Ariyama, Hiroyuki, Kawabe, Katsutoshi (2022): Two New Species of Aoridae from Chichijima Island, the Ogasawara Islands in Japan (Crustacea: Amphipoda). Species Diversity 27 (1): 113-128, DOI: 10.12782/specdiv.27.113, URL: http://dx.doi.org/10.12782/specdiv.27.113
