Recent Podocopid Ostracoda of the Sedili River and Jason Bay, Southeastern Malay Peninsula

Abstract

The recent podocopid Ostracoda of the Sedili River, its estuary and the open shelf of Jason Bay, off the southeast coast of the Malay Peninsula, have been studied quantitatively. The distribution of live and dead assemblages is recorded. A total of 101 species were recorded in the study. Of these, 50 were recorded live in the area. In the freshwater system of the Sedili River, only two species were recorded live, in the brackish water of the Sedili Estuary only 4 live species were recorded while 48 live species were recovered from the open shelf. The dead assemblage exhibits a much higher diversity yet lower dominance than the live assemblage and constitutes a total of 98 species from the 3 biotopes. The dead representatives of species which also occur live are more widely distributed than their live counterparts due to postmortem transportation. In this study one new genus is erected, Malaycythereis, n. gen., and the following new species and subspecies are erected: Malaycythereis trachodes, Caudites asiaticus, C. scopulicolusjasonensis, Cytherella incohatus, Hemicytheridea wangi, Keijella gonia, Loxoconcha malayensis, L. triconicula, Neocytheretta murilineata, Paracytheroma ventrosinuosa, Semicytherura contraria, Leptocythere pulchra, and Xestoleberis malaysiana.