A thirteen-million-year divergence between two lineages of Indonesian coelacanths

Type Article
Date 2020-01
Language English
Author(s) Kadarusman 1, 2, Sugeha Hagi Yulia3, Pouyaud Laurent4, Hocdé Régis5, Hismayasari Intanurfemi B.1, Gunaisah Endang1, Widiarto Santoso B.6, Arafat Gulam6, Widyasari Ferliana6, Mouillot David5, Paradis Emmanuel4
Affiliation(s) 1 : Politeknik Kelautan dan Perikanan Sorong, KKD BP. SR SGK, Jl. Kapitan Pattimura, Tanjung Kasuari, Kota Sorong, 98401, Papua Barat, Indonesia
2 : Sekolah Tinggi Perikanan, KKD Pengelolaan Sumberdaya Perairan. SR BE, Jl. AUP, Pasar Minggu, Jakarta, 12520, Indonesia
3 : Research Center for Oceanography, Indonesian Institute of Sciences, Jl. Pasir Putih 1, Ancol Timur, Jakarta, 14430, Indonesia
4 : ISEM, Univ Montpellier, CNRS, EPHE, IRD, Montpellier, France
5 : MARBEC, Univ Montpellier, IRD, Ifremer, CNRS, Montpellier, France
6 : Loka Pengelolaan Sumberdaya Pesisir dan Laut Sorong, Jl. KPR PDAM, Km. 10, Kota Sorong, 98416, Papua Barat, Indonesia
Source Scientific Reports (2045-2322) (Springer Science and Business Media LLC), 2020-01 , Vol. 10 , N. 1 , P. 192 (9p.)
DOI 10.1038/s41598-019-57042-1
WOS© Times Cited 2
Abstract

Coelacanth fishes of the genus Latimeria are the only surviving representatives of a basal lineage of vertebrates that originated more than 400 million years ago. Yet, much remains to be unveiled about the diversity and evolutionary history of these ‘living fossils’ using new molecular data, including the possibility of ‘cryptic’ species or unknown lineages. Here, we report the discovery of a new specimen in eastern Indonesia allegedly belonging to the species L. menadoensis. Although this specimen was found about 750 km from the known geographical distribution of the species, we found that the molecular divergence between this specimen and others of L. menadoensis was great: 1.8% compared to 0.04% among individuals of L. chalumnae, the other living species of coelacanth. Molecular dating analyses suggested a divergence date of ca. 13 million years ago between the two populations of Indonesian coelacanths. We elaborate a biogeographical scenario to explain the observed genetic divergence of Indonesian coelacanth populations based on oceanic currents and the tectonic history of the region over Miocene to recent. We hypothesize that several populations of coelacanths are likely to live further east of the present capture location, with potentially a new species that remains to be described. Based on this, we call for an international effort to take appropriate measures to protect these fascinating but vulnerable vertebrates which represent among the longest branches on the Tree of Life.

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Kadarusman, Sugeha Hagi Yulia, Pouyaud Laurent, Hocdé Régis, Hismayasari Intanurfemi B., Gunaisah Endang, Widiarto Santoso B., Arafat Gulam, Widyasari Ferliana, Mouillot David, Paradis Emmanuel (2020). A thirteen-million-year divergence between two lineages of Indonesian coelacanths. Scientific Reports, 10(1), 192 (9p.). Publisher's official version : https://doi.org/10.1038/s41598-019-57042-1 , Open Access version : https://archimer.ifremer.fr/doc/00603/71466/