| Title: |
Revision of the alvinocaridid shrimp genus Rimicaris Williams & Rona, 1986 (Decapoda: Caridea) with description of a new species from the Mariana Arc hydrothermal vents |
| Authors: |
Methou, Pierre; Chen, Chong; Komai, Tomoyuki |
| Contributors: |
Biologie et Ecologie des Ecosystèmes Marins Profonds (BEEP); Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO EPE)-Centre National de la Recherche Scientifique (CNRS); We thank the captain and crew on-board R/V KAIMEI during cruise KM23-E05 and R/V KAIREI during cruise KR16-16 for their tremendous support of our scientific activity, also extended to the ROVs KM-ROV and KAIKO teams. We gratefully acknowledge the cruise chief scientists Ken Takai (JAMSTEC; KM23-E05) and Junichi Miyazaki (JAMSTEC; KR16-16), as well as Shinsuke Kawagucci (JAMSTEC) whose successful cruise proposal led to the sampling at NW Eifuku volcano during cruise KM23-E05. The R/V KAIREI research cruise KR16-16 was supported by Council for Science, Technology, and Innovation (CSTI) as the Cross Ministerial Strategic Innovation Promotion Program (SIP), Next-generation Technology for Ocean Resource Exploration. PM was supported by a ISBlue postdoctoral fellowship. CC was supported by Grant-in-Aid for Scientific Research (KAKENHI) from the Japan Society for the Promotion of Science (JSPS), grant code 18K06401.; ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
| Source: |
ISSN: 1175-5326. |
| Publisher Information: |
CCSD; Magnolia Press |
| Publication Year: |
2024 |
| Collection: |
Université de Bretagne Occidentale: HAL |
| Subject Terms: |
Western Pacific; taxonomy; Rimicaris; phylogeny; new species; hydrothermal vent; deep sea; COI; [SDV.BA]Life Sciences [q-bio]/Animal biology |
| Description: |
International audience ; A new species of alvinocaridid shrimp is reported, from the Northwest Eifuku hydrothermal vent field at 1619–1667 m depth on the Mariana Arc. A comprehensive phylogenetic reconstruction of Alvinocarididae based on the mitochondrial cytochrome c oxidase subunit I (COI) gene including this new species reveals the paraphyly of the genus Rimicaris Williams & Rona, 1986 with four other genera—Alvinocaridinides, Manuscaris, Opaepele, and Shinkaicaris—nested within it. We re-examine material of these four problematic genera, and synonymise them under Rimicaris whose diagnosis has been amended, in order to maintain a monophyletic Rimicaris. Our new species, Rimicaris cambonae sp. nov. is genetically close to Rimicaris loihi (Williams & Dobbs, 1995) comb. nov. (previously Opaepele loihi) with which it co-occurs, but can be morphologically distinguished by the less elevated dorsal surface of the rostrum, this being devoid of a median carina, a stronger pterygostomial tooth on the carapace, and a blunt rather than acuminate proximolateral process on the antennular stylocerite. Species previously assigned to the above listed, synonymized genera are also discussed, with new material examined for three key species: R. loihi, R. acuminata, and R. leurokolos. Further, Alvinocaridinides formosa Komai & Chan, 2010 and Manuscaris liui Wang & Sha, 2016 are synonymized under Rimicaris leurokolos (Kikuchi & Hashimoto, 2000) comb. nov. and R. acuminata (Komai & Tsuchida, 2015) comb. nov., respectively. Revised diagnoses are presented for R. loihi, R. acuminata, and R. leurokolos. After the present revision revision, Rimicaris now consists of 15 species. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.11646/zootaxa.5406.4.1 |
| Availability: |
https://hal.univ-brest.fr/hal-04491456; https://doi.org/10.11646/zootaxa.5406.4.1 |
| Accession Number: |
edsbas.EFC86F82 |
| Database: |
BASE |