Dilemma japonicum new species (Bivalvia: Anomalodesmata: Poromyidae): A new record of the genus from the Northwest Pacific

被引：0
|
作者：
Sasaki, Takenori [1 ]
Leal, Jose H. [2 ]
机构：
[1] Univ Tokyo, Univ Museum, Bunkyo Ku, Tokyo 1130033, Japan
[2] Bailey Matthews Shell Museum, Sanibel, FL 33957 USA
来源：
NAUTILUS | 2008年 / 122卷 / 03期
关键词：
Septibranchia; Poromyoidea; Japan; nacreous layer; prodissoconch;
D O I：
暂无
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
The fourth species of the bivalve genus Dilemma Leal, 2008, is described from disarticulated valves collected off central Japan. The discovery of these specimens represents a significant range extension for the germs to the Northwest Pacific. The new species is distinguished from the other three known species by its surface sculpture, shape of escutchcon, and hinge. The prodissoconch, indicative of lecithotrophic development, and shell microstructure, with outer homogeneous and inner nacreous layers, are illustrated for the first time for a species of the genus.
引用
收藏
页码：166 / 170
页数：5
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