Taxonomic study of the genus Apristurus (Scyliorhiniddae, Chondrichthyes)

Apristurus 属（Scyliorhiniddae、Chondrichthyes）的分类学研究

• 批准号: 06660222
• 负责人: NAKAYA Kazuhiro
• 金额: $ 1.34万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06660222/
• 关键词: Scyliorhinidae; Apristurus; taxonomy; undescribed species; grouping; snout; spiral valve; labial furrow; シノニム; 模式標本; シノニム関係

Genus Apristurus is a group of deep sea catsharks, and the taxonomy of the genusis is extremely confusing with poorly known species, and many undescribed species which have been either published or unpublished.Nominal species were taxonomically analyzed, comparing with data of type specimens, which were directly taken by the present author. Thirty one species were recognized as distinct at present. In addition, quite many undescribed species were found from the world oceans. External and internal examination, and morphometric and meristic character analyzes suggested the presence of three subgroups within the genus. All the species were assigned to one of the three groups. First groups, the long-snouted group is characterized by long snout before nostrils, and contains two species, A.herklotsi and A.longicephalus. Second group, short-snouted spongiceps group is characterized by short upper labial furrow and less number of spiral valves. This contains 20 species, like A.atlanticus, A.platyrhynchus, A.laurussoni, A.parvipinnis, etc. Third group, short-snouted brunneus group has longer upper labial furrow and more number of spiral valves, with 9 species, such as A.fedorovi, A.profundorum, and A.kampae. Taxonomic treatments of these groups were left unsolved, until the phylogenetic consideration of the carcharhiniform sharks. Some of the newly found undescribed species are in press, or will be published in the suitable journals.

Apristurus属是深海猫鲨的一个类群，该属的分类极其混乱，其中有一些鲜为人知的物种，以及许多已发表或未发表的未描述物种。对名义种进行了分类学分析，并与作者直接采集的模式标本数据进行了比较。目前有三十一个物种被认为是独特的。此外，在世界海洋中还发现了许多未描述的物种。外部和内部检查以及形态测量和分枝特征分析表明该属内存在三个亚群。所有物种都被分配到三个组之一。第一组，长吻组的特征是鼻孔前面有长吻，包含两个物种：A.herklotsi 和 A.longicephalus。第二组，短吻海绵头肌组，其特点是上唇沟短，螺旋瓣数量少。其中包括A.atlanticus、A.platyrhynchus、A.laurussoni、A.parvipinnis等20种。第三类短吻褐鲽组，上唇沟较长，螺旋瓣数较多，有A.fedorovi、A.profundorum、A.kampae等9种。这些类群的分类学处理一直悬而未决，直到对真鲨的系统发育进行考虑。一些新发现的未描述物种正在出版或将在合适的期刊上发表。