Cypricercus Sars, 1895

Savatenalinton, Sukonthip & Martens, Koen, 2009, Redescription of the type species of Strandesia Stuhlmann, 1888 and Cypricercus Sars, 1895 (Crustacea, Ostracoda, Cypricercinae), with a description of a new species of Cypricercus from South Africa, Zootaxa 2007, pp. 1-42 : 4

Genus Cypricercus Sars, 1895

Type species: Cypricercus cuneatus Sars, 1895

Abbreviated diagnosis. Carapace generally elongated (height and width less than half the length), not laterally flattened. Position of LV and RV in frontal view equal. LV with groove along anterior, ventral and posterior margins and with 1 or 2 inner lists anteriorly; channel inside valve border absent. RV with anterior and posterior selvage. T1 with a-, b- and d-setae. α-seta on Md-palp smooth, 2-segmented. The attachment of the caudal ramus stout, with large Triebel’s loop situated in the middle branch, ventral and dorsal distal branches present; caudal ramus stout, with fine setulae along the ventral margin. Hemipenis with small, subquadrate lateral shield, 2 internal loops of the spermiduct and with a symmetrical penile attachment situated at the proximal connected bases. Zenker’s organ with distal end plate, forming a crown of petal-like structure.

Differential diagnosis. Cypricercus can be distinguished from Strandesia by the divided α-seta on Mdpalp, the absence of a channel in the fused zone of the LV, the elongated carapace (more than twice the height) and the morphology of the Zenker’s organ. Cypricercus differs from Astenocypris and Tanycypris in the presence of the long groove on LV and the presence of a d-seta on T1, and from Bradleystrandesia and Spirocypris in the appearance of the Triebel’s loop on the main branch of the caudal ramus attachment. Cypricercus differs from Bradleycypris by the symmetrical (not oblique) position of both valves in frontal view and by the absence of an anterior inner list in the latter genus.