Atyoida Randall, 1840

Mazancourt, Valentin de, Marquet, Gérard & Keith, Philippe, 2024, An Integrative Taxonomic Revision of the Freshwater Atyid Shrimps (Crustacea: Decapoda: Caridea) of Micronesia, Diversity 16 (200), pp. 1-31 : 8

Genus Atyoida Randall, 1840

Diagnosis (from [44]): body pigmented, eyes well developed; rostrum not strongly compressed laterally, median dorsal carina typically unarmed, ventral keel with zero–four teeth; anterior margin of carapace armed with antennal spine, pterygostomian margin sharply or bluntly acute; supraorbital spines absent; telson with setigerous posterior margin overreaching posterolateral angles; third maxilliped with uncinate terminal spine; pereiopods without exopods; first and second pereiopods with chelae heteromorphic (with or without palm), fingers tipped with brushes of setae, carpus of both appendages excavate distally, little if at all longer than broad; third pereiopod without meral spur in large males; branchial complement consisting of five pleurobranchs, three arthrobranchs, one podobranch, five epipods, and five mastigobranchs; first pleopod of male with endopod tapering sinuously but rather regularly to slender apex; second pleopod of male with appendix masculina sub-cylindrical, spinose over more than distal half.