A new species of Striostrea (Bivalvia: Flemingostreidae) from the upper Pliocene and lower Pleistocene strata of Florida, USA

作者：Bolton Michael J^*; Portell Roger W

来源：Nautilus, 2013, 127(2): 65-77.

• Mollusca
• Crassostreinae
• Striostrea gigantissima (Finch, 1824)
• Conradostrea
• Fossil

Faunal studies of the Tamiami and Caloosabatchee formations (upper Pliocene to lower Pleistocene) in southern peninsular Florida have revealed a new crassostreine oyster, Striostrea paucichomata Bolton new species. Although similar in appearance, this bivalve differs from Crassostrea virginica (Gmelin, 1791) by having weakly developed thomata (not visible in about 30% of the specimens examined), the right valve having a riblet-bearing surficial layer (visible only on exceptionally well-preserved specimens), and an adductor muscle attachment that is situated more dorsally. The geology of the type area of S. paucichomata in northern Sarasota County, and a stratigraphic nomenclatural history of the Tamiami and Caloosahatchee formations are reviewed. A key to Cenozoic crassostreine oysters known from the southeastern United States is also provided. The following new generic placements are proposed for four previously named species: Myrakeena sculpturata (Conrad, 1840) new combination, Myrakeena lawrencei (Ward and Blackwelder, 1987) new combination, Myrakeena greeni (Ward, 1992) new combination, Undulostrea locklini (Gardner, 1945) new combination and Striostrea cahobasensis (Pilsbry and Brown, 1917) new combination.

• 出版日期2013-6-21