855. PLIOCENE FRESHWATER BIVALVES (LAMPROTULA AND CUNEOPSIS : UNIONIDAE) FROM THE IGA FORMATION, MIE PREFECTURE, CENTRAL JAPAN

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  • 855. 三重県伊賀累層からの鮮新世淡水棲二枚貝 Lamprotula と Cuneopsis
  • 三重県伊賀累層からの鮮新世淡水棲二枚貝LamprotulaとCuneopsis〔英文〕
  • ミエケン イガルイソウ カラ ノ センシンセイ タンスイセイ 2マイガイ La

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Abstract

The following six species of freshwater bivalves are described from the Pliocene Iga Formation in the Ueno Basin, central Japan : Lamprotula (Sinolamprotula) sp. A, L. (Parunio) sp. B, L. sp., Cuneopsis (Cuneopsis) gracilenta, n. sp., C. (Procuneopsis) okuyamai, n. sp., and C. (Tchangsinaia) praemaxima, n. sp. These unionid species of the genera Lamprotula and Cuneopsis become extinct in the Japanese Islands in Recent times, but they are still living in China. These bivalves are the only record of this age known from the Japanese Islands.

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