Stegocephalus Kroyer , 1842

Wang, Yanrong, Sha, Zhongli & Ren, Xianqiu, 2024, One new species of Stegocephalus Kroyer, 1842 (Amphipoda, Stegocephalidae) described from a seamount of the Caroline Plate, NW Pacific, ZooKeys 1195, pp. 121-130 : 121

Genus Stegocephalus Kroyer, 1842

Diagnosis.

Body smooth. Antenna 2 with peduncular article 4 shorter or longer than article 5. Epistomal plate absent. Mandible incisor lateral, toothed; left lacinia mobilis powerful, toothed, distally produced. Maxilla 1 palp well developed, 1- or 2-articulated. Outer plate of maxilla 2 gaping and geniculate, with setae distally with hooks (absent in S. ampulla ). Palp of maxilliped 4-articulated, article 2 unproduced or inner margin produced distally. Pereopods 1-2 simple. Pereopod 6 basis conspicuously expanded. Uropod 3 biramous, outer ramus l-articulate, peduncle shorter than rami. Telson elongate, cleft (amended after Barnard and Karaman 1991; Berge and Vader 2001).