Okanishi Masanori, Fujita Toshihiko
Misaki Marine Biological Station, Graduate School of Science, The University of Tokyo, 1024 Koajiro, Misaki, Miura, Kanagawa 238-0225, Japan.
Zootaxa. 2018 Mar 8;4392(2):289-310. doi: 10.11646/zootaxa.4392.2.4.
A revision of the genus Astrodendrum Döderlein (Ophiuroidea, Euryalida, Gorgonocephalidae) is based on 14 specimens, including the holotypes of Astrodendrum galapagense A. H. Clark and Astroconus capense Mortensen and a syntype of Gorgonocephalus sagaminus Döderlein. A new species Astrodendrum spinulosum is described from the Pacific coast of Japan. It is distinguished from its congeners in having conical external ossicles on aboral side of the disc; bulges on lateral edges of proximal arms; 1 terminal projection on each arm spine of proximal portion of the arm; 2 or 3 secondary teeth on each hook-shaped arm spine of distal portion of the arm. A taxonomic key to all six species of the genus Astrodendrum is provided.
基于14个标本对星蛇尾属（Astrodendrum Döderlein，蛇尾纲，真蛇尾目，戈氏蛇尾科）进行了修订，其中包括加拉帕戈斯星蛇尾（Astrodendrum galapagense A. H. Clark）和开普星锥蛇尾（Astroconus capense Mortensen）的正模标本以及萨氏戈氏蛇尾（Gorgonocephalus sagaminus Döderlein）的一个同模标本。描述了来自日本太平洋沿岸的一个新物种——小刺星蛇尾（Astrodendrum spinulosum）。它与同属其他物种的区别在于：盘的背面有圆锥形外部骨片；近端腕节的侧边缘有凸起；腕节近端部分的每个腕棘上有1个末端突起；腕节远端部分的每个钩形腕棘上有2或3个次生齿。提供了星蛇尾属所有6个物种的分类检索表。
