Grandidierella Coutière, 1904

Ariyama, Hiroyuki & Taru, Masanori, 2017, Three Species of Grandidierella (Crustacea: Amphipoda: Aoridae) from Coastal Areas of the Tohoku and Kanto-Tokai Districts, East Japan, with the Description of Two New Species, Species Diversity 22, pp. 187-200 : 187

Grandidierella Coutière, 1904

[Japanese name: Dorosokoebi-zoku]

Grandidierella Coutière, 1904: 166 ; Barnard and Karaman

1991: 194; Myers and Lowry 2003: 465. Neomicrodeutopus Schellenberg, 1925: 168 . ( Bigrandidierella ) Karaman, 1985: 37.

Diagnosis [emended from Barnard and Karaman (1991)]. Body subcylindrical, slightly depressed laterally, smooth. Rostrum short, ocular lobes short; eyes small to medium. Urosomites free. Antennae elongate; antenna 1 slender, peduncular article 3 much shorter than article 1, accessory flagellum uniarticulate; antenna 2 stouter than antenna 1, flagellum shorter than peduncular article 5. Mandibular palp with 3 articles, article 3 rectolinear or clavate. 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 nail. Coxae small, relatively shallow; 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, dactylus stout. Female gnathopod 1 smaller than that of male, subchelate; carpus longer than or subequal to propodus, palm oblique. Gnathopod 2 of both sexes smaller than gnathopod 1, subchelate; carpus longer than propodus, palm almost transverse. Pereopods 3 and 4 similar to each other, slender; bases elongate. Pereopods 5–7 similar to each other, pereopod 5 much shorter than pereopods 6–7; bases of pereopods 6–7 heavily setose. Uropods 1–2 biramous, spinous, uropod 1 longer than uropod 2, peduncles longer than both rami; uropod 3 uniramous, peduncle shorter than single ramus, dilated medially. Telson entire, short, fleshy, with pair of hooked apical cusps.