Home Life Sciences Hydrolithon abyssophila sp. nov. (Hydrolithoideae, Corallinales), a bisporic coralline from the insular shelf edge of Puerto Rico and the Virgin Islands (US)
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Hydrolithon abyssophila sp. nov. (Hydrolithoideae, Corallinales), a bisporic coralline from the insular shelf edge of Puerto Rico and the Virgin Islands (US)

  • Athanasios Athanasiadis EMAIL logo , David L. Ballantine and Hector Ruiz
Published/Copyright: October 29, 2013

Abstract

A new species of Hydrolithon is described from mesophotic habitats, between 30 and at least 76 m depth, off La Parguera, Puerto Rico, and St Thomas, Virgin Islands (Caribbean Sea). Its encrusting thallus covers corals and rocks. Hydrolithon abyssophila sp. nov. is distinctive in developing bisporangia that are about twice as large as its congeners and in lacking both perithallial protuberances and trichocytes in horizontal or vertical groups. It reproduces primarily by uninucleate bispores that presumably recycle the parental phase. Unfertilized carpogonia were observed in one collection suggesting the rare occurrence of gametophytic reproduction in the species.


Corresponding author: Athanasios Athanasiadis, University of Gothenburg, Marine Botany, P.O. Box 461, SE 405 30 Gothenburg, Sweden, e-mail:

Financial support for the field and laboratory work was provided through grants from the Captain Stenholms Foundation and The Royal Society of Arts and Sciences in Goteborg to Athanasios Athanasiadis. David L. Ballantine and Hector Ruiz acknowledge funding by the National Oceanographic and Atmospheric Administration Coastal Ocean Program under award #NA17OP2919 and (in part) #NA06NOS4780190 to the University of Puerto Rico – Mayagüez. We also thank three anonymous referees for their helpful comments.

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Received: 2013-2-27
Accepted: 2013-9-26
Published Online: 2013-10-29
Published in Print: 2013-12-01

©2013 by Walter de Gruyter Berlin Boston

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