更新世前期の大桑・万願寺動物群中の岩石穿孔性二枚貝化石群集

概要

論文の詳細を見る
From the lower Pleistocene strata in Japan Sea borderland, the following four species of rock-boring bivalves were obtained; Hiatella arctica (Linnaeus), Zirfaea subconstricta (Yokoyama), Penitella gabbii (Tryon) and Nettastomella japonica (Yokoyama). All these species are now living around Japanese Islands. Such a high extant rate is probably due to their endolithic life style. The Nettastomella and the Penitella-Zirfaea associations are recognized by the combination of above mentioned species. The southern limit of the Nettastomella association living around northern Hokkaido was situated at central Honshu in early Pleistocene. This distributional pattern and the low diversity of associations are attributed to the colder climate in those age than in the recent.
日本古生物学会の論文
1995-06-30