Osteodiscus abyssicola, a new snailfish (Cottoidei: Liparidae) collected off the Pacific coast of northern Japan
Osteodiscus abyssicola, a new snailfish (Cottoidei: Liparidae) collected off the Pacific coast of northern Japan
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DOI：
10.11646/zootaxa.5032.1.8
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发表时间：
2021-09-06
期刊：
影响因子：
0.9
通讯作者：
Fukui，Atsushi
中科院分区：
文献类型：
--
作者：
Murasaki，Kenta;Kai，Yoshiaki;Fukui，Atsushi
本文记述了采自日本北方北海道太平洋沿岸4，671 - 4，744米深的一种细骨螺（Osteodiscus abyssicola sp. nov.）它与目前所有已确认的同类相区别的特征组合如下：椎骨49;背鳍条44;臀鳍条39;主尾鳍条8;幽门盲囊5;口水平;两颚上的牙齿简单而锋利，没有尖;上下颚联合没有间隙;头部孔径中等，类似于或略大于鳃;鳃裂腹侧延伸至第二胸鳍条基部;胸鳍具缺刻;下颌联合至肛门中心101.6%头长（HL）;骨盆盘后缘至肛门中心15.5% HL;硬膜1，退化;侧肋无。本文提供了骨盘虫的订正诊断和种检索表。
The snailfish Osteodiscus abyssicola sp. nov. is described from a single specimen collected off the Pacific coast of Hokkaido, northern Japan, at a depth of 4,671–4,744 m. It is distinguished from all currently recognized congeners by the following combination of characters: vertebrae 49; dorsal-fin rays 44; anal-fin rays 39; principal caudal-fin rays 8; pyloric caeca 5; mouth horizontal; teeth on both jaws simple and sharp, without cusps; upper and lower jaw symphyses without diastema; cephalic pore sizes moderate, similar to or slightly larger than nostril; gill slit extending ventrally to 2 nd pectoral-fin ray base; pectoral fin notched; mandibular symphysis to center of anus 101.6% head length (HL); posterior edge of pelvic disk to center of anus 15.5% HL; epural 1, reduced; epipleural ribs absent. An emended diagnosis and key to the species of Osteodiscus are provided.