当前位置: X-MOL 学术Ichthyol. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Chimaera compacta , a new species from southern Indian Ocean, and an estimate of phylogenetic relationships within the genus Chimaera (Chondrichthyes: Chimaeridae)
Ichthyological Research ( IF 1.2 ) Pub Date : 2021-03-28 , DOI: 10.1007/s10228-021-00810-9
Samuel P. Iglésias , Jenny M. Kemper , Gavin J. P. Naylor

Chimaera compacta sp. nov., a new species of shortnose chimaera (Holocephali: Chimaeriformes: Chimaeridae), is described from a single specimen collected at 595–655 m depth, off Amsterdam Island, in the southern Indian Ocean. The species is easily distinguished from its congeners by the combination of the following characters: massive head with short snout; stocky and relatively long trunk 44% BDL, short tail with second dorsal fin base 72% BDL; long pelvic fin anterior margin 26% BDL. Caudal fin dorsal origin slightly posterior to caudal fin ventral origin. Firm, non-deciduous skin; brown color with yellow blotches. Chimaera compacta sp. nov. is morphologically close to Chimaera lignaria Didier 2002 from New Zealand and Chimaera willwatchi Clerkin, Ebert and Kemper 2017 from south western Indian Ocean. The new species can be distinguished from other Chimaera species based on DNA sequences divergence of the COI and NADH2 genes. This species has a nucleotide sequence divergence (uncorrected p distances) for the studied genes of 4.2 and 4.1%, respectively, with its closest relatives. Phylogenetically, Chimaera compacta sp. nov. is nested within a well-supported group including Chimaera carophila Kemper, Ebert, Naylor and Didier 2014, Chimaera didierae Clerkin, Ebert and Kemper 2017, C. lignaria, Chimaera macrospina Didier, Last and White 2008, Chimaera notafricana Kemper, Ebert, Compagno and Didier 2010, Chimaera opalescens Luchetti, Iglésias and Sellos 2011, and C. willwatchi. It is the first Chimaeridae described for the Territory of the French Southern and Antarctic Lands.



中文翻译:

Chimaera compacta,一种来自印度洋南部的新物种,并且估计了Chimaera属内的系统发育关系(Chondrichthyes:Chimaeridae)

Chimaera compacta sp。11月,从印度洋南部阿姆斯特丹岛附近595-655 m深度采集的单个标本中描述了一种短头奇马属的新物种(Holocephali:Chimaeriformes:Chimaeridae)。通过将以下特征组合在一起,可以很容易地将其与同类动物区分开来:头部短而鼻尖的大头;矮胖,躯干相对较长,BDL 44%,短尾巴,第二背鳍基部,BDL 72%;骨盆鳍前缘长,BDL 26%。尾鳍背起源于尾鳍腹起源稍后。坚硬,无落叶的皮肤;棕色,带黄色斑点。Chimaera compacta sp。十一月 在形态上与来自新西兰和Chimaera willwatchi的Chimaera lignaria Didier 2002相近来自西南印度洋的Clerkin,Ebert和Kemper,2017年。基于COI和NADH2基因的DNA序列差异,可以将新物种与其他Chimaera物种区分开。该物种与其最接近的亲属的核苷酸序列差异(未校正的p距离)分别为4.2%和4.1%。从系统发育上看,致密的Chimaera compacta sp.。十一月 被嵌套在一个有良好支持的群体中,包括Chimaera carophila Kemper,Ebert,Naylor和Didier 2014,Chimaera didierae Clerkin,Ebert and Kemper 2017,C。lignariaChimaera macrospina Didier,Last and White 2008,Chimaera notafricanaKemper,Ebert,Compagno和Didier 2010,Chimaera opalescens Luchetti,Iglésias和Sellos 2011,以及C. willwatchi。这是针对法国南部和南极领土描述的第一只科科。

更新日期:2021-03-29
down
wechat
bug