Morphology and phylogenetic analysis of two new deep-sea species of Chrysogorgia (Cnidaria, Octocorallia, Chrysogorgiidae) from Kocebu Guyot (Magellan seamounts) in the Pacific Ocean
Autor: | Kuidong Xu, Yang Li, Zifeng Zhan, Yu Xu |
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Rok vydání: | 2019 |
Předmět: |
0106 biological sciences
0301 basic medicine Cnidaria Octocorallia gorgonian Seamount Zoology Evolutionary biology Guyot phylogeny 010603 evolutionary biology 01 natural sciences Deep sea taxonomy 03 medical and health sciences Chrysogorgiidae lcsh:Zoology Oceans Biodiversity & Conservation Animalia lcsh:QL1-991 Chrysogorgia ramificans sp. nov Chrysogorgia binata sp. nov Ecology Evolution Behavior and Systematics geography geography.geographical_feature_category biology Phylogenetic tree Alcyonacea Anthozoa biology.organism_classification Pacific 030104 developmental biology Gorgonian Chrysogorgia Animal Science and Zoology Taxonomy (biology) Research Article |
Zdroj: | ZooKeys ZooKeys 881: 91-107 ZooKeys, Vol 881, Iss, Pp 91-107 (2019) |
ISSN: | 1313-2970 1313-2989 |
Popis: | Two new species of Chrysogorgia Duchassaing & Michelotti, 1864 collected from Kocebu Guyot in the Magellan seamounts of the Pacific Ocean are described and illustrated: Chrysogorgia ramificanssp. nov. collected from a depth of 1831 m and Chrysogorgia binatasp. nov. collected from a depth of 1669 m. Chrysogorgia ramificanssp. nov. belongs to the Chrysogorgia “group A, Spiculosae” with rods distributed in body wall and tentacles, and C. binatasp. nov. belongs to the “group C, Squamosae typicae” with rods and/or spindles not present but only scales. Chrysogorgia ramificanssp. nov. differs from congeners by its main stem with 2/5R branching sequence at the bottom forming two large bottlebrush-shaped branches with 1/3R branching sequence at the top. Chrysogorgia binatasp. nov. is similar to C. scintillans Bayer & Stefani, 1988, but differs by its larger polyps, larger sclerites in the body wall, and different scales in the upper part of polyps. The mtMutS genetic distances between C. ramificanssp. nov. and C. binatasp. nov. and congeners are in the range of 0.33%–2.28% and 0.33%–2.94%, respectively, while the intraspecific distances are in the range of 0–0.16%. Molecular phylogenetic analysis indicates that C. ramificanssp. nov. is clustered with C. monticola Cairns, 2007 and C. binatasp. nov. is clustered with C. chryseis Bayer & Stefani, 1988, both with high support indicating close relationships. |
Databáze: | OpenAIRE |
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