Orcinocyamus, MARGOLIS, 1955

Iwasa-Arai, Tammy & Serejo, Cristiana Silveira, 2018, Phylogenetic analysis of the family Cyamidae (Crustacea: Amphipoda): a review based on morphological characters, Zoological Journal of the Linnean Society 184, pp. 66-94 : 89

ORCINOCYAMUS MARGOLIS, 1955

Diagnosis: Antenna 1 four-articulated; antenna 2 small, four-articulated. Maxilliped lacking palps. Lateral gills bilobed; accessory gills absent. Pereonites 3 and 4 of male subequal in length to Per5; Per5–Per7 each bearing a pair of acute ventral processes; Per5– Per7 process on basis absent.

Type species: Orcinocyamus orcini (Leung, 1970) .

Remarks: Orcinocyamus orcini was described by Leung (1970b) from O. orca and transferred to Orcinocyamus based on differing morphology and the semi-phyletic analysis performed by Margolis et al., (2000), corroborated by Haney (1999) and the present study.