open access

https://hdl.handle.net/2115/98159

Integrative taxonomy of Janirella (Isopoda: Asellota: Janirellidae), with descriptions of two new species from the Japan Trench and an amended classification of the genus

英語

Subgenus

2025-03-11

Springer

Biologia

80(6)

1407-1423

We describe two new Janirella species, Janirella scutum sp. n. and Janirella spinoscutum sp. n., collected at depths of 2893–3176 m on the landward slope of the Japan Trench, northwestern Pacific. These species differ from congeners in having a fusiform body with dorsal spines on each pereonite; and the pleotelson with two pairs of short and one pair of long lateral projections; rostrum as long as cephalothorax, tip concave, with two distal spines. They differ from one another in the number and size of dorsal spines on the pereonites. We determined partial sequences for the cytochrome c oxidase subunit I (COI) gene for the two new species and seven other Janirella species and constructed a COI-based maximum-likelihood tree of Janirella. In the tree, the subgenus Parjanirella was monophyletic but embedded within a paraphyletic group of species in the subgenus Janirella. Based on this result, we propose the elimination of subgenus ranks in Janirella.

学術雑誌論文

Accepted Manuscript

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s11756-025-01906-7

1336-9563

AA00565037