10.5061/DRYAD.VDNCJSXSR
Wepfer, Patricia
0000-0002-2678-9770
Okinawa Institute of Science and Technology
Nakajima, Yuichi
Okinawa Institute of Science and Technology
Sutthacheep, Makamas
Ramkamhaeng University
Radice, Veronica Z.
University of Queensland
Richards, Zoe
Curtin University
Ang, Put
Chinese University of Hong Kong
Terraneo, Tullia
King Abdullah University of Science and Technology
Sudek, Mareike
Department of Marine and Wildlife Resources, American Samoa
Fujimura, Atsushi
University of Guam
Toonen, Robert J.
University of Hawaii at Manoa
Mikheyev, Alexander S.
Okinawa Institute of Science and Technology
Economo, Evan P.
Okinawa Institute of Science and Technology
Mitarai, Satoshi
Okinawa Institute of Science and Technology
Evolutionary biogeography of the reef-building coral genus Galaxea across
the Indo-Pacific ocean
Dryad
dataset
2020
FOS: Biological sciences
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
17J00366
Japan Society for the Promotion of Science
https://ror.org/00hhkn466
16H05621
XL Catlin Seaview Survey*
2020-12-03T00:00:00Z
2020-12-03T00:00:00Z
en
https://doi.org/10.1016/j.ympev.2020.106905
https://doi.org/10.5061/dryad.dncjsxm39
https://doi.org/10.1111/jbi.14475
7790027718 bytes
5
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Stony corals (Scleractinia) form the basis for some of the most diverse
ecosystems on Earth, but we have much to learn about their evolutionary
history and systematic relationships. In order to improve our
understanding of species in corals, we here investigated phylogenetic
relationships between morphologically defined species and genetic lineages
in the genus Galaxea (Euphyllidae) using a combined phylogenomic and
phylogeographic approach. Previous studies revealed the nominal species G.
fascicularis included three genetically well-differentiated lineages (L, S
& L+) in the western Pacific, but their distribution and
relationship to other species in the genus were unknown. Based on genomic
(RAD-seq) and mitochondrial sequence data (non-coding region between cytb
and ND2) we investigated whether the morphological taxa represent
genetically coherent entities and what is the phylogenetic relationship
and spatial distribution of the three lineages of G. fascicularis
throughout the observed species range. Using the RAD-seq data, we find
that the genus Galaxea is monophyletic and contains three distinct clades:
an Indo-Pacific, a Pacific, and a small clade restricted to the Chagos
Archipelago. The three lineages of G. fascicularis were associated with
different RAD-seq clades, with the āLā lineage showing some morphological
distinction from the other two lineages (larger more asymmetrical polyps).
In addition to these, three more genetic lineages in G. fascicularis may
be distinguished ā a Chagossian, an Ogasawaran, and one from the
Indian-Red Sea. Among nominal taxa for which we have multiple samples, G.
horrescens was the only monophyletic species. The mitochondrial non-coding
region is highly conserved apart from the length polymorphism used to
define L, S & L+ lineages and lacks the power to distinguish
morphological and genetic groups resolved with genomic RAD-sequencing. The
polyphyletic nature of most species warrants a careful examination of the
accepted taxonomy of this group with voucher collections and their
comparison to type specimens to resolve species boundaries. Further
insight to the speciation process in corals will require international
cooperation for the sharing of specimens to facilitate scientific
discovery.