Encountering the morphological and molecular complexity in the bramble shark Echinorhinus cf. E. brucus (Bonnaterre 1788) from the Oman Sea

IF 1.1 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY
José Raúl Morales-Ávila, Sarah H. Al-Jufaili, Nicolás Álvarez-Pliego, Ricardo J. Saldierna-Martínez
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引用次数: 0

Abstract

Abstract This is the first simultaneous morphological and barcoding characterization with the cytochrome c oxidase subunit I (COI) of the bramble shark Echinorhinus from the coast of Oman. The morphology of the specimen was consistent with previous records of Echinorhinus from the Gulf of Oman and the Arabian Sea (Northwestern Indian Ocean). However, the new COI haplotype clustered together with homologous sequences of specimens from India. The specimen from Oman distinguished morphologically and genetically from an E. brucus from the Western Atlantic Ocean on the shape and size of the dermal denticles, the proportions of twelve morphometric measurements (differences ⩾3%) and the genetic p-distance = 3.8% of the COI fragment. The haplotype reported here increases the genetic diversity in genus Echinorhinus in the Northwest Indian Ocean, demonstrates conspecificity between specimens from Oman and Echinorhinus cf. E. brucus distributed in India and extends its range of distribution. The limited morphological and molecular data available constrained assigning our specimen to other than Echinorhinus cf. E. brucus (Bonnaterrez, 1788). Our findings highlight the urgent need of morphological review, redescription and the assignment of a neotype in order to guarantee accurate species identification and thus effective conservation measures for these deep-sea sharks. The existence of a third living species in the genus is briefly discussed.
阿曼海刺鲨Echinorhinus cf. E. brucus (Bonnaterre 1788)的形态和分子复杂性
摘要:本文首次对阿曼海岸的棘猴进行了细胞色素c氧化酶亚基I (COI)的形态学和条形码同时鉴定。该标本的形态与先前在阿曼湾和阿拉伯海(西北印度洋)发现的棘龙的记录一致。然而,新的COI单倍型与印度标本的同源序列聚集在一起。来自阿曼的标本在形态学和遗传学上与来自西大西洋的布鲁氏杆菌在真皮小齿的形状和大小、12个形态测量的比例(差异大于或等于3%)和COI片段的遗传p-距离= 3.8%上进行了区分。本文报道的单倍型增加了西北印度洋棘猴属的遗传多样性,证明了阿曼棘猴与印度棘猴之间的同源性,并扩大了其分布范围。现有的有限形态学和分子数据限制了将我们的标本分配给棘猴cf. E. brucus以外的物种(Bonnaterrez, 1788)。我们的研究结果表明,迫切需要形态学审查,重新描述和新类型的分配,以确保准确的物种鉴定,从而有效地保护这些深海鲨鱼。本文简要讨论了该属中第三种现存物种的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
68
审稿时长
3-8 weeks
期刊介绍: JMBA is an international journal, publishing original research on all aspects of marine biology. It includes pioneering work taking place today on major issues concerning marine organisms and their environment. Subjects covered include: ecological surveys and population studies of marine communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants; and chemical and physical oceanographic work. Included with 2010 online subscriptions: Marine Biodiversity Records.
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