A new family and two new genera of calcaxonian octocoral, including a redescription of Pleurogorgia militaris (Cnidaria : Octocorallia : Chrysogorgiidae) and its placement in a new genus
Stephen D. Cairns
A F , Ralf T. S. Cordeiro A B , Yu Xu C D , Zifeng Zhan D and Philip Alderslade E
+ Author Affiliations
- Author Affiliations
A Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, PO Box 37012, Washington, DC 20013-7012, USA.
B Departamento de Ciências Biológicas, Universidade Federal Rural de Pernambuco, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, Recife, PE 52171-900, Brazil.
C University of Chinese Academy of Sciences, Beijing, 100049, PR China.
D Laboratory of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, PR China.
E CSIRO Oceans & Atmosphere, Castray Esplanade, Hobart, Tas. 7001, Australia.
F Corresponding author. Email: cairnss@si.edu
Invertebrate Systematics 35(3) 282-297 https://doi.org/10.1071/IS20066
Submitted: 22 August 2020 Accepted: 23 November 2020 Published: 24 March 2021
Abstract
Golden corals (chrysogorgiids sensu lato) are conspicuous components in deep-sea gorgonian assemblages. Although common, their taxonomy still conflicts with evolutionary histories, mostly due to low character availability and poor taxonomic knowledge. This is the case for the genus Pleurogorgia, which has been frequently reported in ROV surveys, dominating hard-bottoms throughout the Indo-Pacific. Herein, molecular phylogenetic reconstructions based on mitochondrial and nuclear datasets, and examination of new and old type material led us to suggest new systematic arrangements for some of the genera. We create a new genus, Ramuligorgia, to accommodate Pleurogorgia militaris, redescribing it as Ramuligorgia militaris comb. nov. within the family Chrysogorgiidae sensu stricto. Additionally, we describe Aurogorgia tasmaniensis gen. nov. et sp. nov., including it and the type species, Pleurogorgia plana, within Pleurogorgiidae fam. nov.
Keywords: Aurogorgia, Pleurogorgiidae, phylogeny, Ramuligorgia, taxonomy.
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