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Integrative morphological, mitogenomic and phylogenetic analyses reveal new vent-dwelling scallop species

Identification

Clé publique

radar:r-3209b0afe4289bede5f92de8d6f2b33b

Auteurs

Yi‐Tao Lin · Ying-Bei Peng · Chong Chen · Ting Xu · Jian‐Wen Qiu

Année déclarée

2025

Langue déclarée

en

Type source

article

Première détection

2026-11-14T02:13:02.862794+00:00

Dernière observation des métadonnées

2026-11-14T02:13:02.862794+00:00

Dernière vérification HTTP

Non effectuée

Institutions déclarées par la source

Hong Kong Baptist University · Japan Agency for Marine-Earth Science and Technology · Hong Kong University of Science and Technology · Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) · The Hong Kong University of Science and Technology (Guangzhou)

Pays d’affiliation déclarés

CN · HK · JP

Résumé documentaire — langue originale

Delectopecten is a small genus of the family Pectinidae (Bivalvia: Pectinida) that remains poorly studied in terms of both morphology and phylogeny. Here, we describe the first member of this genus from deep-sea hydrothermal vent ecosystems, D. thermus sp. nov., based on morphological investigations and molecular analyses of a specimen collected from the Higashi-Ensei vent field (962-m depth) in the northern Okinawa Trough. Morphologically, this new species resembles D. vancouverensis and D. gelatinosus in shell size, shape, auricle size and sculpture. However, D. thermus sp. nov. can be distinguished from its congeneric species (including 9 extant and 12 fossil species) by its unequal auricles (the anterior one being larger than the posterior), inwardly recurved anterior auricle of the left valve and a large byssal notch angle of ~90°. Comparisons of genetic sequences from three mitochondrial and three nuclear gene fragments supported the placement of the new species in the genus Delectopecten . Further phylogenetic analyses using these gene markers support that Delectopecten is monophyletic and positioned as an early diverging clade of the family Pectinidae. Additionally, the mitogenome of D. thermus sp. nov. was assembled and annotated, a first for its genus - revealing significant divergences in gene order compared to other pectinids. The 16S rRNA amplicon analysis of the gill tissue indicated that this vent-dwelling scallop does not exhibit symbiosis with chemosynthetic bacteria. A key to all known species of Delectopecten is provided to aid the identification of species in this understudied genus. ZooBank: urn:lsid:zoobank.org:pub:D3D5D4AD-EE39-49F0-9782-12A5D6752A67.

Identifiants

OPENALEX

https://openalex.org/W4407284804

DOI

10.1071/is24091

PMID

https://pubmed.ncbi.nlm.nih.gov/39928520

Repères documentaires

Famille documentaire

article

Types déclarés par les sources

article

Éditeurs

CSIRO Publishing

Les mentions d’entités ne constituent pas une preuve de reconnaissance juridique. La juridiction étudiée est distincte du pays d’affiliation des auteurs.

Sources

OpenAlex · Document 1

• Document · https://doi.org/10.1071/is24091

Statut documentaire

Pertinence à examiner

Bibliothèque

Cette identité n’est pas encore intégrée à la Bibliothèque juridique.