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Cyclocypris diebeli Absolon, 1973 (Ostracoda, Crustacea), extinct in Europe, extant in Japan
Abstract and Figures
Fossil Cyclocypris diebeli Absolon, 19731. Absolon , A . 1973 . Ostracoden aus einigen Profilen spät- und postglazialer Karbonatablagerungen in Mitteleuropa, . Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Historische Geologie , 13 : 47 – 94 . View all references from Europe are redescribed, utilizing material with chitinous preservation of the appendages and carapace. These are compared with living C. diebeli from Kushiro Marsh, Hokkaido, Japan, representing the first living population of this species ever found. The fossil material is associated with strongly calcareous sediments, whereas the living material is found in weakly calcareous to acidic waters. Reasons for the different ecological requirements are discussed. Detailed study of soft parts of both living and fossil material using SEM is compared with other Cyclocypris species and it is shown that C. diebeli is more closely related to the North American Cyclocypris cruciata Furtos, 193510. Furtos , N. C . 1935 . Fresh-water Ostracoda from Massachusetts, . Journal of the Washington Academy of Sciences , 25 : 530 – 544 . View all references than to any European congeneric species. Furthermore, the comparison with other Cyclocypris species with left>right valve overlap results in the conclusion that the subgenus Laevicypris Krstić, 199522. Krstić N 1995 A new Cyclocypris subgenus—Laevicypris, in J. Ríha (ed.) Ostracoda and Biostratigraphy. Proceedings of the 12th International Symposium on Ostracoda (Rotterdam: A. Balkema), pp. 37–42 View all references is not a useful division of the genus.
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