Phylogeny of freshwater mollusc genus Brotia H. Adams, 1866 (Gastropoda: Pachychilidae) from north-east India

IF 1.8 2区生物学 Q3 EVOLUTIONARY BIOLOGY

Invertebrate Systematics Pub Date : 2023-11-17 DOI:10.1071/IS23037

Anushree S. Jadhav, Surya Narayanan, Chinta Sidharthan, F. Köhler, N. A. Aravind

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引用次数: 0

Abstract

ABSTRACT The pachychilid genus Brotia H. Adams, 1866, distributed across South and South-East Asia, comprises 46 currently accepted species. Although Brotia has recently been revised, the systematic treatment of the Indian species requires further scrutiny. This study aims to resolve the phylogenetic relationships between Brotia species from north-east India and estimate the divergence using two mitochondrial markers, cytochrome c oxidase subunit I (COI) and 16S ribosomal RNA (16S). Species delimitation analyses have revealed six to nine distinct species in north-east India instead of the single currently known species. We confirm the monophyly of Brotia from the entire distributional range in South and South-East Asia and show that all Indian species form a single clade nested within the South-East Asian radiation. We conclude that Brotia has a South-East Asian origin, with two independent dispersals into India since the early Eocene and through the Oligocene, eventually splitting from ancestors during the late Cretaceous. Further integrative taxonomic research is needed to resolve the taxonomic status of the candidate species delineated herein and reveal the exact number of species in north-east India. This is the first phylogenetic analysis of Brotia from India, significantly improving our understanding of Indian freshwater gastropod fauna.

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印度东北部淡水软体动物 Brotia H. Adams, 1866（腹足纲：Pachychilidae）的系统发育

ABSTRACT pachychilid 属 Brotia H. Adams，1866 年，分布于南亚和东南亚，目前有 46 个公认的种。尽管 Brotia 属最近已被修订，但印度种的系统处理仍需进一步研究。本研究旨在利用细胞色素 c 氧化酶亚单位 I（COI）和 16S 核糖体 RNA（16S）这两个线粒体标记，解决印度东北部 Brotia 物种之间的系统发育关系，并估计其分化情况。物种划分分析表明，印度东北部有 6 到 9 个不同的物种，而不是目前已知的单一物种。我们从南亚和东南亚的整个分布范围中证实了 Brotia 的单系性，并表明所有印度种形成了嵌套在东南亚辐射内的单一支系。我们的结论是，Brotia起源于东南亚，自始新世早期至渐新世期间曾两次独立扩散到印度，最终在白垩纪晚期与祖先分离。需要进一步开展综合分类研究，以确定本文划分的候选物种的分类地位，并揭示印度东北部物种的确切数量。这是首次对印度的 Brotia 进行系统发育分析，大大提高了我们对印度淡水腹足动物群的认识。

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

Invertebrate Systematics 生物-动物学

CiteScore

4.30

自引率

9.10%

发文量

审稿时长

>12 weeks

期刊介绍： Invertebrate Systematics (formerly known as Invertebrate Taxonomy) is an international journal publishing original and significant contributions on the systematics, phylogeny and biogeography of all invertebrate taxa. Articles in the journal provide comprehensive treatments of clearly defined taxonomic groups, often emphasising their biodiversity patterns and/or biological aspects. The journal also includes contributions on the systematics of selected species that are of particular conservation, economic, medical or veterinary importance. Invertebrate Systematics is a vital resource globally for scientists, students, conservation biologists, environmental consultants and government policy advisors who are interested in terrestrial, freshwater and marine systems. Invertebrate Systematics is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.