Miocene vesicomyid species (Bivalvia) from Wakayama in southern Honshu, Japan

作者：Amano Kazutaka^*; Jenkins Robert G; Ohara Masaaki; Kiel Steffen

来源：Nautilus, 2014, 128(1): 9-17.

• Miocene
• Archivesica
• Adulomya

A fossil association of potentially chemosymbiotic bivalves is reported from the lower Miocene Shikiya Formation in Kii Oshima Island, Wakayama Prefecture, Japan. The association is dominated by the elongate vesicomyid species Adulomya uchimuraensis (Kuroda, 1931); a second vesicomyid of lower abundance is here described as Archivesica sakoi new species. It represents the oldest species of the genus Archivesica and has a similar hinge structure as %26quot;Calyptogena%26quot; laubieri (Okutani and Metivier, 1986). Additional faunal elements include chemosymbiotic bivalves, namely the solemyid Acharax cf. yokosukensis Kanie and Kuramochi, 1995, and the lucinids Lucinoma? sp. and Poumea? sp., as well as the naticid gastropod Euspira meisensis (Makiyama, 1926). This association of fossil bivalves all with well-known chemosymbiotic living relatives suggests that these specimens lived at an ancient cold seep, and their mode of occurrence as mostly articulated shells parallel to the bedding plane indicates that were transported a short distance and then quickly buried.

• 出版日期2014-4-16