A new species of beaked whale Mesoplodon perrini sp N. (Cetacea: Ziphiidae) discovered through phylogenetic analyses of mitochondrial DNA sequences
A new species of beaked whale Mesoplodon perrini sp N. (Cetacea: Ziphiidae) discovered through phylogenetic analyses of mitochondrial DNA sequences
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DOI：
10.1111/j.1748-7692.2002.tb01061.x
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发表时间：
2002-07-01
影响因子：
2.3
通讯作者：
van Helden, AL
中科院分区：
文献类型：
--
作者：
Dalebout, ML;Mead, JG;van Helden, AL
Mesoplodon perrini是喙鲸的一个新种，根据1975年5月至1997年9月期间搁浅在加州海岸（北纬32度55 '、西经117度15'和北纬36度37 '、西经121度55'之间）的五只动物进行了描述。这些动物中有四只最初被确定为赫克托的喙鲸M。hectori基于颅骨形态学（Mead 1981）。第五个标本最初被确定为新生的居维叶的喙鲸Ziphius cavirostris基于外部特征。通过线粒体DNA控制区和细胞色素B序列的系统发育分析，这些标本首次被认为是一个未描述的物种的代表。虽然形态相似，但遗传数据不支持M之间有密切的进化关系。perrini和M.相反，这些数据表明与较小的喙鲸M，peruvianus可能有姐妹物种关系。在197海里的加州外发现了两头小喙鲸，初步确定为M。hectori也可能是M，perrini。hectori仅分布于南半球，而M.迄今为止，只在北太平洋发现了佩里尼。
Mesoplodon perrini, a new species of beaked whale is described on the basis of five animals stranded on the coast of California (between 32degrees55'N, 117degrees15'W and 36degrees37'N, 121degrees55'W) from May 1975 to September 1997. Four of these animals were initially identified as Hector's beaked whales M. hectori based on cranial morphology (Mead 1981). A fifth specimen was initially identified as a neonate Cuvier's beaked whale Ziphius cavirostris based on external features. These specimens were first recognized as representatives of an undescribed species through phylogenetic analysis of mitochondrial (mt) DNA control region and cytochrome b sequence data. Although similar morphologically, the genetic data do not support a close evolutionary relationship between M. perrini and M. hectori, Instead, these data suggest a possible sister-species relationship with the lesser beaked whale M, peruvianus. Sightings of two small beaked whales off California in the 197 Os which were tentatively identified as M. hectori are also likely to be M, perrini, We suggest that M. hectori is confined to the Southern Hemisphere, while M. perrini is known to date only from the North Pacific.