Stebbing, 1888
Body compressed, smooth, or weakly carinate. Eyes reniform, sometimes surrounded by additional large pigment spot. ANT I longer than II. Accessory flagellum uni-articulate, from elongate to scale-like. Mandibular molar strong, triturative, columnar. Inner lobe of MX I with 1 medial, 1 apical seta, or fewer. Inner plates of MX II much broader, but not longer, than outer. Lower lip with small inner lobes. CX I produced anteriorly, expanded ventrally (sometimes slightly). CX IV excavated, with posterior lobe. P I and II subchelate, not of eusirid form, ART 5 with posterior lobe, ART 6 broad. P III-VII simple, not elongate. Epimeral plate III serrate or smooth. Exopodites of UR I-II slightly shorter than endopodites. Telson cleft.
Fifteen species, one in the South Atlantic plankton:
Eusiroides stenopleura K. Barnard, 1932