マスダ ヨシキ   Yoshiki Masuda
  益田 芳樹
   所属   川崎医療福祉大学  医療福祉学部 臨床心理学科
   職種   特任教授
論文種別 原著
言語種別 日本語
査読の有無 査読なし
表題 熊本県人吉盆地の鮮新世人吉層から産出した淡水海綿化石
掲載誌名 正式名:豊橋市自然史博物館研究報告
ISSNコード:09171703
巻・号・頁 16,31-37頁
著者・共著者 松岡敬二, 益田芳樹, 北林栄一
発行年月 2006/03
概要 Fossils of a spongillid sponge, Eunapius sinensis (Annandale) were discovered from the upper part of the Pliocene Hitoyoshi Formation of the Hitoyoshi Basin, Kumamoto Prefecture, Kyushu, Japan. They constitute the second occurence record of Eunapius sinensis as fossil. The Hitoyoshi Formation consists of lacustrine deposits, which contain diatoms, water plants, insects, cyprinid fishes, and molluscs besides the sponge. Gemmules of fossil sponges occur as rounded spots which encrust the surface of molluscan shells and massive mudstone. The spicular components consist of megascleres and gemmoscleres, and the latter are more abundant. This mode of occurence of fossil sponges suggests only gemmules were laft after death on the surface of molluscan shells and mud.
The recent Eunapius sinensis is distributed ovre China, Russia and Japan. Compared with the recent Eunapius sinensis, the Pliocene Eunapius sinensis is small in average length of megascleres.