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A new alcyonacean species (Cnidaria: Anthozoa: Octocorallia) from a seamount in the tropical Pacific Ocean

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In the eastern Pacific Ocean, the genus Thesea has only been reported off Isla del Coco, Costa Rica, and La Jolla, California. Herein we describe a new species of Thesea from the threatened mesophotic zone of Hannibal Bank seamount and report the occurrence of the genus in Panama. The morphological characters of the species were analyzed and illustrated by optic and scanning electron microscopy. Thesea dalioi sp. nov. can be distinguished from the only other eastern Pacific species, Thesea variabilis (Studer, 1894), in the colony shape, branch thickness, prominent polyp mounds, bright red color of the colony and sclerites, and the size and composition of sclerites. This new species represents the second published report for the genus in the region and contributes to our understanding of the diversity and distribution of the octocorals from the mesophotic zone in the eastern Pacific Ocean.
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Document Type: Research Article

Affiliations: 1: Centro de Investigación en Estructuras Microscópicas, Centro de Investigación en Ciencias del Mar y Limnología, Escuela de Biología, Universidad de Costa Rica. P.O. Box 11501- 2060, Universidad de Costa Rica, San José, Costa Rica;, Email: [email protected] 2: Smithsonian Tropical Research Institute, P.O. Box 0843-03092, Panama, Republic of Panama

Publication date: October 1, 2018

This article was made available online on June 21, 2018 as a Fast Track article with title: "A new alcyonacean species (Cnidaria: Anthozoa: Octocorallia) from a seamount in the tropical Pacific Ocean".

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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