Updated phylogeny of Vestimentifera (Siboglinidae, Polychaeta, Annelida) based on mitochondrial genomes, with a new species

Marina F McCowin; Patrick C Collins; Greg W Rouse

doi:10.1016/j.ympev.2023.107872

Updated phylogeny of Vestimentifera (Siboglinidae, Polychaeta, Annelida) based on mitochondrial genomes, with a new species

Mol Phylogenet Evol. 2023 Oct:187:107872. doi: 10.1016/j.ympev.2023.107872. Epub 2023 Jul 13.

Authors

Marina F McCowin¹, Patrick C Collins², Greg W Rouse³

Affiliations

¹ Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA. Electronic address: marruda@ucsd.edu.
² Queen's University Belfast, Belfast, Co. Antrim, BT9 5DL, Northern Ireland.
³ Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA; South Australian Museum, North Terrace, Adelaide, SA 5000, Australia. Electronic address: grouse@ucsd.edu.

PMID: 37451325
DOI: 10.1016/j.ympev.2023.107872

Abstract

Siboglinid tubeworms are found at chemosynthetic environments worldwide and the Vestimentifera clade is particularly well known for their reliance on chemoautotrophic bacterial symbionts for nutrition. The mitochondrial genomes have been published for nine vestimentiferan species to date. This study provides new complete mitochondrial genomes for ten further Vestimentifera, including the first mitochondrial genomes sequenced for Alaysia spiralis, Arcovestia ivanovi, Lamellibrachia barhami, Lamellibrachia columna, Lamellibrachia donwalshi, and unnamed species of Alaysia and Oasisia. Phylogenetic analyses combining fifteen mitochondrial genes and the nuclear 18S rRNA gene recovered Lamellibrachia as sister to the remaining Vestimentifera and Riftia pachyptila as separate from the other vent-endemic taxa. Implications and auxiliary analyses regarding differing phylogenetic tree topologies, substitution saturation, ancestral state reconstruction, and divergence estimates are also discussed. Additionally, a new species of Alaysia is described from the Manus Basin.

Keywords: Chemosynthetic; Deep-sea taxonomy; Mitochondrial genome; New species; Siboglinidae; Tubeworms; Vestimentifera.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

MeSH terms

Animals
Annelida* / genetics
Bacteria / genetics
Genome, Mitochondrial*
Phylogeny
Polychaeta* / genetics