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Systematics and distribution of the squid genus Pterygioteuthis (Cephalopoda: Oegopsida) in the eastern tropical Pacific Ocean

机译:东部热带太平洋鱿鱼属蕨类植物(翼足目:Oegopsida)的系统分布

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摘要

Understanding speciation in pelagic marine organisms is difficult due to poor knowledge of their systematics and distribution. This paper examines the systematics of the squid genus Pterygioteuthis and its distribution and speciation in the eastern tropical Pacific Ocean. A morphology-based phylogenetic analysis identifies two clades: the P. giardi group (P. giardi giardi and P. giardi hoylei) and the P. gemmata group (P. gemmata and P. microlampas). Based on its morphological and biogeographic differences from P. giardi giardi, the subspecies P. giardi hoylei (fide Nesis, 1987) is elevated to species status and a neotype designated. Also, to clarify taxonomic issues in the P. gemmata group, a neotype is designated for P. microlampas Berry, 1913. These strictly pelagic taxa have distinct distributions; P. hoylei is the only pyroteuthid to occur in the relatively isolated eastern tropical Pacific (ETP), while P. giardi inhabits the temperate north and south Pacific (excluding the ETP) and the Atlantic. Pterygioteuthis microlampas is known only from off the Hawaiian Islands and New Zealand, while P. gemmata extends throughout the temperate Pacific (excluding the ETP) and Atlantic. This study represents the first detailed cladistic analysis of Pyroteuthidae and generates new hypotheses regarding speciation in the open ocean.
机译:由于对海洋中层生物的系统和分布了解不足,因此很难了解其形成。本文研究了鱿鱼属蕨类植物的系统学及其在东部热带太平洋的分布和物种形成。基于形态学的系统发育分析可识别两个进化枝:P。giardi组(P. giardi giardi和P. giardi hoylei)和P. gemmata组(P. gemmata和P. microlampas)。基于其与贾第鞭毛虫的形态和生物地理差异,贾第鞭毛亚种(fide Nesis,1987)被提升为物种地位,并被指定为新种。另外,为了澄清体育双子星类群中的分类学问题,一种新的类型被指定为微型体育双子星贝里,1913年。 hoylei是唯一在相对孤立的东部热带太平洋(ETP)中发生的吡咯烷酮,而giardi则栖息在北太平洋和南太平洋(不包括ETP)和大西洋的温带地区。 Pterygioteuthis microlampas仅在夏威夷群岛和新西兰以外才知道,而P. gemmata则遍布整个温带太平洋(不包括ETP)和大西洋。这项研究代表了对拟杆菌科的首次详细的分类分析,并产生了有关公海物种形成的新假设。

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  • 来源
    《Journal of Molluscan Studies》 |2010年第4期|p.389-398|共10页
  • 作者

    Annie R. Lindgren12;

  • 作者单位

    1Museum of Biological Diversity, 1315 Kinnear Road, Ohio State University, Columbus, OH 43212, USA 2Present address: Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA;

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