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Issue: Vol. 5497 No. 4: 27 Aug. 2024
Type: Article
Published: 2024-08-27
DOI: 10.11646/zootaxa.5497.4.3
Page range: 505-519
Abstract views: 54
PDF downloaded: 12

Toward a revision of the bamboo corals: Part 6, Illuminating a new candelabrum genus (Octocorallia: Keratoisididae)

Department of Biology; University of Louisiana at Lafayette; Lafayette; LA 70504 USA
School of Life Sciences; University of Hawaii at Manoa; Honolulu; HI 96822 USA
Octocorallia Deep sea bathyal roV observations taxonomy seamounts North Atlantic ocean North Pacific ocean morphological variation

Abstract

Observations and collections made using remotely operated vehicles (ROV) outfit with high-definition video cameras on bathyal seamounts of the North Atlantic and North Pacific have revealed a bamboo coral (Octocorallia, Keratoisididae) with consistent and recognizable colony morphology: a long unbranched “stem” from which many vertically aligned branches arise in a single plane to produce the aspect of a tall candelabrum. Additional observations encountered colonies with only 3 branches arising from the central terminal node to produce the appearance of a standing trident. Genetic analyses suggested both colony morphologies (trident and candelabrum) to be the same species at different growth stages. Herein we formally describe this taxon, Tridentisis candelabrum n. gen. n. sp., erecting a new genus to accommodate the unique and distinctive colony morphology, and discuss morphological variation observed across the documented geographic range.

 

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