A new Ostracoda subfamily, Loxocaudinae subfam. nov., separated from the subfamily Loxoconchinae of the family Loxoconchidae with five genera (Loxocauda Schornikov, 1969, Glacioloxoconcha Hartmann, 1990, Phlyctocythere Keij, 1958, Pseudoloxoconcha Müller, 1894 and Sarmatina Stancheva, 1984) is described in the paper. The new subfamily differs from Loxoconchinae Sars, 1926 s. str. by the presence of a compact eye, the absence of an eye tubercle, an originally adont hinge with a tendency to formation of an anterior tooth on the left valve and a posterior one on the right valve, a pronounced caudal process and reduction of fossa-mural sculpture. The volume of the genera that are included in the subfamily is determined. A review of 55 various species and forms mentioned in the literature in open nomenclature, whose taxonomic position has not been determined yet is presented. A total of 45 species close to Loxocauda are attributed to the new subfamily, but proper morphological investigations are necessary for their classification. Ten species that were referred earlier to the genera included in Loxocaudinae are excluded from this subfamily. Issues of functional morphology of Loxocaudinae shells and morphological evolution of their sculpture are considered.
Russian Journal of Marine Biology – Springer Journals
Published: Jul 8, 2011
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