Incorporation of deep-sea and small-sized species provides new insights into gastropods phylogeny

Type Article
Date 2019-06
Language English
Author(s) Lee Hsin1, 2, Chen Wei-Jen2, Puillandre Nicolas1, Aznar-Cormano Laetitia1, Tsai Mong-Hsun3, Samadi Sarah1
Affiliation(s) 1 : Sorbonne Univ, CNRS, Museum Natl Hist Nat, ISYEB, EPHE CP 26,57 Rue Cuvier, F-75005 Paris, France.
2 : Natl Taiwan Univ, Inst Oceanog, Room 301,1 Sec 4 Roosevelt Rd, Taipei 10617, Taiwan.
3 : Natl Taiwan Univ, Inst Biotechnol, Room 301,1 Sec 4 Roosevelt Rd, Taipei 10617, Taiwan.
Source Molecular Phylogenetics And Evolution (1055-7903) (Academic Press Inc Elsevier Science), 2019-06 , Vol. 135 , P. 136-147
DOI 10.1016/j.ympev.2019.03.003
WOS© Times Cited 20
Keyword(s) Deep sea, Gastropoda, Phylogeny, Mitogenome, Next generation sequencing, Chemosynthetic environment
Abstract

The use of phylogeny with uneven or limited taxon sampling may bias our interpretation of organismal evolution, for instance, the origin(s) of the deep-sea animals. The Mollusca is the second most speciose phylum, in which the Gastropoda forms the largest group. However, the currently proposed hypotheses of gastropod phylogeny are mainly based on part of their taxonomic diversity, notably on the large-sized and shallow-water species. In this study, we aimed at correcting this bias by reconstructing the phylogeny with new mitogenomes of deep-sea gastropods including Anatoma sp., Bathysciadiidae sp., Bayerotrochus teramachii, Calliotropis micraulax, Coccocrater sp., Cocculina subcompressa, Lepetodrilus guaymasensis, Peltospira smaragdina, Perotrochus caledonicus, Pseudococculinidae sp., and Shinkailepas briandi. This dataset provided the first reports of the mitogenomes for the Cocculiniformia, three vetigastropod superfamilies: Pleurotomarioidea, Lepetelloidea, and Scissurelloidea, and the neritimorph family Phenacolepadidae. The addition of deep-sea representatives also allowed us to evaluate the evolution of habitat use in gastropods. Our results showed a strongly supported sister-group relationship between the deep-sea lineages Cocculiniformia and Neomphalina. Within the Vetigastropoda, the Pleurotomarioidea was revealed as the sister-group of the remaining vetigastropods. Although this Glade was presently restricted to the deep sea, fossil records showed that it has only recently invaded this habitat, thus suggesting that shallow waters was the ancestral habitat for the Vetigastropoda. The deep-sea Lepetelloidea and Lepetodriloidea formed a well-supported Glade, with the Scissurelloidea sister to it, suggesting an early transition from shallow water to deep sea in this lineage. In addition, the switch between different chemosynthetic habitats was also observed in deep-sea gastropod lineages, notably in Neomphalina and Lepetelloidea. In both cases, the biogenic substrates appeared as the putative ancestral habitat, confirming the previously proposed hypothesis of a wooden-step to deep-sea vents scenario of evolution of habitat use for these taxa.

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