Ostracoda of the Family Loxoconchidae from the Gulf of Panama

概要

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Of 234 stations sampled in Gulf of Panama, ostracode specimens were found at 121 stations. The present paper represents the second in a series on Ostracoda from Gulf of Panama, and deals with Loxoconchidae which comprises 11 species distributed among six genera. One genus : Touroconcha; and three species : Loxoconcha dorsobulba, Palmoconcha minima, and Nipponocythere nagaseae; are described as new. In addition to the conventional description of new species, the micro-ornamentations of valve surface are shown through scanning electronic microscopy, and their characteristics and differences are demonstrated for the respective species. In the Gulf, Palmoconcha laevimarginata Swain and Gilby, 1974, Loxocorniculum sculptoides Swain, 1967 and Nipponocythere nagaseae n. sp. prevail widely, and are especially common on the outer shelf area. Palmoconcha minima n. sp. and Loxocorniculum fischeri (Brady, 1869) have a restricted distribution in the Gulf, but are sometimes common on the outer shelf area. All these forms have been recorded from the Eastern Tropical Pacific and Caribbean-Gulf Coast regions, and would probably be useful in constructing respective characteristic faunas. On the other hand, Loxoconcha dorsobulba n. sp. and Loxocorniculum schusterae (Hartmann, 1959) are common only on the inner shelf area, and seem to be more or less endemic.
東北大学の論文
1976-03-25