Ooneides Chatton & Brément, 1915

Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), Megataxa 4 (1), pp. 1-6 : 619

Genus Ooneides Chatton & Brément, 1915

Diagnosis. Body ovoid, laterally compressed:comprising cephalosome, first to fifth pedigerous somites and genital somite all completely fused plus extremely reduced abdomen. Entire prosome forming brood pouch with extreme dorsal expansiondisplacing cephalicappendages and abdomen, so that both positioned ventrally, close to each other. Abdomen rudimentary, not articulated from prosome, unsegmented or obscurely segmented. Caudal rami small, bearing small setae. Rostrum distinct. Antennule short, 2-segmented with secondsegment small. Antenna 3-segmented with small terminal claw. Labrum broad. Mandible and maxillule each as lobe bearing few setae. Maxilla and maxilliped absent. Leg 1 broad, lamellate, directed anteriorly, weakly bilobed distally, with claw on tip of inner lobe (endopod). Legs 2–5 absent.

Type species. Ooneides amela Chatton & Brément, 1915 by original monotypy.

Remarks. This genus may be characterised by its ovoid body and highly reduced abdomen, by the presence of vestigial mandibles and maxillules, the lack of the maxillae and maxillipeds, by the presence of a lamellate, unsegmented leg 1, and by the absence of legs 2–5. The discovery of an additional species described below, helps to further refine the generic boundaries of Ooneides .