Publication Date:
2024-01-12
Description:
During several cruises carried out by the Ifremer (Institut fran\xc3\xa7ais de recherche pour l\xe2\x80\x99exploitation de la mer) with the submersile \xe2\x80\x9cNautile\xe2\x80\x9d at different hydrothermal sites and cold seeps, an important collection of anthozoans - mainly actiniarians - was sampled. Additional material was collected by an American cruise with the submersile \xe2\x80\x9cAlvin\xe2\x80\x9d. The goal of the present contribution is to describe part of this actiniarian fauna inhabiting three chemoautotrophic sites, one of them in the Mid-Atlantic Rise and the other two in the Eastern Pacific. A new genus and species of actinostolids is proposed after the study of specimens collected at hydrothermal vents in the Guaymas Basin (East Pacific Rise, Gulf of California, 27\xc2\xba00\xe2\x80\x99N-111\xc2\xba24\xe2\x80\x99W, 2020 m). Furthermore, some specimens collected in cold seeps along the MAT (Middle America Trench, off Mexico, 18\xc2\xba21\xe2\x80\x99-20\xc2\xb001\xe2\x80\x99N 104\xc2\xba21\xe2\x80\x99-106\xc2\xba17\xe2\x80\x99W, 3354-3795 m) are reported as Hadalanthus aff. knudseni. This material is discussed and compared with the existing type material of H. knudseni Carlgren, 1956, and Tealidium jungerseni Carlgren, 1921. In addition, some specimens of Maractis rimicarivora Fautin & Barber, 1999, were collected at hydrothermal vents of the Mid Atlantic Ridge Snake Pit (23\xc2\xba22.9\xe2\x80\x99N-44\xc2\xba55.8\xe2\x80\x99W, 3490 m) site. This species is collected for the first time after its original description at Trans-Atlantic Geotraverse (TAG, 26\xc2\xba08\xe2\x80\x99N 44\xc2\xba49.6\xe2\x80\x99W, 3650 m). Some ecological remarks are given from in situ and video observations.
Keywords:
Cnidaria
;
Anthozoa
;
Actinostolidae
;
Paranthosactis denhartogi gen. et spec. nov.
;
Hadalanthus aff. knudseni
;
Maractis rimicarivora
;
hydrothermal vents
;
cold seeps
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
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