Atyopsis Chace, 1983

Genus Atyopsis Chace, 1983 View in CoL

Diagnosis (from [44]): body pigmented, eyes well developed; rostrum not strongly compressed laterally, median dorsal carina typically unarmed, ventral keel with 2–16 teeth; anterior margin of carapace armed with antennal spine, pteygostomian margin sharply acute; supraorbital spines absent; telson with posterolateral angles overreaching setigerous posterior margin; third maxilliped not terminating in single apical spine; pereiopods without exopods; first and second pereiopods with chelae monomorphic (without palm), fingers tipped with brushes of long setae adapted for filter feeding, carpus of both appendages excavate distally, little if at all longer than broad; third pereiopod of large males with prominent spur on merus; branchial complement consisting of five pleurobranchs, three arthrobranchs, one podobranch, five epipods (reduced posteriorly), no mastigobranchs; first pleopod of male with endopod rigid, rhomboidally oval, submarginally spinose; second pleopod of male with appendix masculina subcylindrical, spinose over entire length distal to base of appendix interna.