Validation of the family Bathyporeiidae (Crustacea, Amphipoda) Author D'Acoz, Cedric D'Udekem text Zootaxa 2011 2791 54 62 journal article 10.5281/zenodo.205162 4cbbb066-8294-4d5a-8641-5145939f6dd2 1175-5326 205162 Amphiporeia Shoemaker, 1929 Amphiporeia Shoemaker, 1929 : 167 . — d'Udekem d'Acoz, 2007 : 65 (ubi syn.) Antenna 2 : article 5 of peduncle equal to article 4 ; flagellum with strong and long posterior setae, longer than anterior setae ; flagellum not increasing in size at maturity in males. Mandible : incisor process with about 7 erect spines ; lacinia mobilis circular in cross section, not blade-shaped ; palp with article 3 with D3-setae in all individuals , with transverse rows of B3-setae, with article 2 broad, with 1 anterior B2-seta or with anterotransversal rows of B2-setae. Maxilla 1 : article 2 of palp with facial row of setae and distal row of spines . Maxilliped : article 2 of palp without posterodistal lobe ; article 3 of palp broad to bulbous, not curved . Coxa 1 ventrally directed , with anterior border nearly straight . Gnathopod 1 subchelate, with broad propodus, not reduced in size . Gnathopod 2 subchelate , very similar in size and morphology to gnathopod 1. Pereiopod 5 with dactylus small but not vestigial . Pereiopod 7 with basis posteriorly broadly rounded and distally produced; ischium quadrate . Urosomite 1 without dorsal bumps (profile dorsally rectilinear), without spines and setae . Uropod 3 with inner ramus elongate , 0.3 to 0.5 times as long as outer ramus; outer ramus normally with 3 groups of spines on lateral border of article 1 (sometimes with a fourth reduced proximal group); article 2 with setae, if any, on medial border only. Telson with one or two groups of lateral spines or setae. Type species. A. lawrenciana Shoemaker, 1929 . See Shoemaker (1929: 167) Composition. A. gigantea Bousfield, 1973 ; A. lawrenciana Shoemaker, 1929 ; A. virginiana Shoemaker, 1933 Distribution and biology. Northwestern Atlantic; sandy bottoms; intertidal to nearly 200 m ( Bousfield, 1973 ).