软体动物
深水
海洋学
深海
渔业
鹦鹉螺
地质学
八达通(软件)
作者
Gilbert L. Voss,William G. Pearcy
摘要
Descriptions and illustrations are given of nine species of Octopoda from depths of 1,000 m to 4,000 m off the coast of Oregon. Eight are new: Grimpoteuthis bathynectes, G. tuftsi, Benthoctopus robustus, B. canthylus, B. oregonensis. B. yaquinae, B. macrophallus, and Graneledone pacifica. Four genera are treated:
Cirroteuthis and Grimpoteuthis of the Cirrata and Benthoctopus and Graneledone of the lncirrata. Cirroteuthis muelleri is first recorded from the Pacific Ocean and is redescribed. The genus Benthoctopus in the North Pacific is discussed and a provisional key for the nine recognized species is provided. The variability and form of the radula of Graneledone are considered to be due to degeneracy and not primitiveness, and to lack of selective feeding pressure.
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