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 英語
査読の有無 査読なし
表題 Scanning electron microscopic observations on spicules, gemmule coats, and micropyles of the freshwater sponges, Eunapius sinensis (Annandale).
掲載誌名 正式名:Kawasaki Medical Journal Liberal Arts & Science Course
ISSNコード:03865398
巻・号・頁 18,75-82頁
著者・共著者 Masuda Yoshiki, Kuniyasu Satoh
発行年月 1992/12
概要 In Japan, Eunapius sinensis was first collected from Lake Kawaguchi in Yamanashi Prefecture and Lake Ashino in Kanagawa Prefecture by Sasaki in 1935. This species was found in the Hyakken River in Okayama Prefecture in 1987, and is here recorded for the third time in Japan.
Based on the structure of its skeletons, this sponge is flat with spreading thin layers without any projecting branches. Magascleres were feebly curved and entirely smooth amphioxea, and were 192-295 um in length and 8.1-15.3 um in width. Microscleres were absent. Gemmoscleres were rather robust, usually slightly curved amphioxea, and ranged from being smooth to being covered with a few to many large and irregular spines. They were 37-110 um in length, and 4.8-8.7 um in width. Malformation of the gemmoscleres was quite frequent.
Gemmules were somewhat depressed, subspherical and formed a pavement layer at the base of the sponge, which firmly adhered to bamboo for support. The pneumatic layer was more or less developed, of variying thickness, consisted of polygonial prismatic alveoli and formed a continuous coat over the gemmules. But the pneumatic layer at the base of the gemmule, which adhered to bamboo for support, lacked alveoli. Gemmoscleres were embedded tangentially in the pneumatic layer on great numbers. Micropyles were tubular. Porus tubes protruded slightly from the surface of the pneumatic layer.