首页> 外文期刊>Bulletin of the National Museum of Nature and Science >Myopsaron nelsoni, a New Genus and Species of Sandburrowers (Perciformes: Trichonotidae: Creediinae) from the Ogasawara Islands, Japan
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Myopsaron nelsoni, a New Genus and Species of Sandburrowers (Perciformes: Trichonotidae: Creediinae) from the Ogasawara Islands, Japan

机译:日本小gas原群岛的新近代沙漏者(Myopsaron nelsoni)和沙Spec种(Perciformes:Trichonotidae:Creediinae)

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摘要

A new genus and species of the trichonotid subfamily Creediinae, Myopsaron nelsoni, is described based on 43 specimens, including 20 type specimens (22.1-36.3 mm in standard length), collected by sledge nets at the depths of 55-99 m off southern Chichi-jima Island, Ogasawara Islands, Japan. It is readily distinguished from the other genera of the subfamily by having some unique, apparently autapomorphic, features, e.g., the globular fleshy extension at the tip of upper jaw, discontinuous lateral line on body, higher number of precaudal vertebrae than caudal vertebrae (24-26+18-21=43-45 vertebrae), and edentate premaxilla. Myopsaron is highly specialized, but, as well as Creedia, it appears to be nested within the basal creediines since it lacks several specializations found in all other creediines exclusive of the most primitive member, Schizochirus.
机译:基于43个标本,包括20个类型标本(标准长度为22.1-36.3 mm),由爬虫网在奇奇南部55-99 m深度处收集到的,描述了毛线虫亚科Creediinae的一个新属和种,其中包括20个类型标本。 -日本小gas原群岛的吉马岛。它很容易与亚科的其他属区分开来,具有一些独特的,明显的共形特征,例如,上颌尖的球状肉质延伸,身体上不连续的侧线,尾椎前椎骨的数量比尾椎椎高(24 -26 + 18-21 = 43-45椎骨),然后上颌前突。 Myopsaron是高度专业化的,但与Creedia一样,它似乎也嵌套在基础Creediines内,因为它缺乏除最原始成员Schizochirus以外的所有其他Creediines中发现的几个专业化知识。

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