Note on the geographic distribution of Chione cortezi (Carpenter, 1864) (Mollusca: Pelecypoda: Veneridae)
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Abstract
Chione cortezi is not a well known species of bivalve and has been reported with a distribution that includes the Gulf of California as far as Bahía Magdalena on the western coast of Baja California. Since there are no recent observations of this species outside the northern Gulf of California, two expeditions were done in search of this species in May and July 1996. The records from the Centro Interdisciplinario de Ciencias Marinas at La Paz, Baja California Sur, Mexico, were also revised. The results of this study indicate that this species is restricted to the Biosphere Reserve of the Northern Gulf of California and the delta of the Colorado River. Alternatives are analyzed that explain the discrepancy between the observed and reported distributions. It is concluded that the reports of geographical distribution were based on a confusion of species between Chione fluctifraga and C. cortezi.
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