Rotundoecia Chavtur & Angel 2011, n.gen.

• Main Authors: Chavtur, Vladimir G., Angel, Martin V.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Ostracoda; Halocyprida; Halocyprididae; Rotundoecia; Pacific; Seta; Southern Ocean
• Online Access: https://zenodo.org/record/5293187; https://doi.org/10.5281/zenodo.5293187

ROTUNDOECIA Chavtur & Angel, n.gen. Synonymy: 1894 Conchoecia rotundata —Müller, p. 229 (part). 1906a Conchoecia rotundata group—Müller, p. 83 (part). 1909 Conchoecia rotundata group—Fowler, (part). 1953 Conchoecia —Iles, p. 271 (part). 1968 Conchoecia —Deevey, p. 55 (part). 1973 Metaconchoecia —Poulsen, p. 74 (part). 1974 Conchoecia —Deevey, p. 364 (part). 1978 Conchoecia —Deevey, p. 53 (part). 1979 Metaconchoecia —Martens, p. 352 (part). 1981 Conchoecia skogsbergi species complex—Gooday, p. 141 (part). 1981 Conchoecia —Angel, p. 560 (part). 1986 Metaconchoecia —Kempf, p. 486 (part). 1999 Metaconchoecia —Angel, figs 9.58–76 (part). Etymology. The name is derived from the Latin adjective “ rotundus, -a, -um” meaning round, and “-oecia” derived from the Greek word “οƖκοσ” meaning “house”, from which the terms ecology and economy have been derived, and is the ending that has become standard for Conchoeciinae genera. Type species. Conchoecia teretivalvata Iles, 1953. Composition. The genus consists of a single species Rotundoecia teretivalvata (Iles, 1953) Differential diagnosis. Small globose species 0.78–1.15 mm, with a height of 52–60%CL and a width of 42– 48%CL. The ventral margin curves smoothly into the posterior margin, and the flanks also curve smoothly from the rostrum to the posterior margin. The carapace lacks sculpturing. The rostrum is quite small (8%CL) and the incisure is quite shallow. The LAG opens 11 to 12%CL behind the tip of the rostrum. The RAG opens on the posterior margin, nearly adjacent to the posterior end of the hinge. The male A1 e-seta armature consists of 9 to 11 pairs of slim spines. Description. Males. Carapace: The length range in the Atlantic is 0.76–0.92 mm, but larger specimens (up to 1.15 mm) have been reported both in the Southern Ocean (Deevey 1974) and in the S.E. Pacific off Chile (Martens 1979). The maximum height, 50–55%CL is located well posterior to midlength, so the carapace tapers anteriorly. In the ventral aspect, the flanks curve smoothly with the maximum breadth ...