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Gayana. Botánica

Print version ISSN 0016-5301On-line version ISSN 0717-6643

Abstract

MENDOZA-GONZALEZ, Catalina; PEDROCHE, Francisco F  and  MATEO-CID, Luz Elena. THE GENUS HYDROLITHON FOSLIE (CORALLINALES, RHODOPHYTA) ALONG THE ATLANTIC AND CARIBBEAN COASTS OF MEXICO. Gayana Bot. [online]. 2009, vol.66, n.2, pp.218-238. ISSN 0016-5301.  http://dx.doi.org/10.4067/S0717-66432009000200008.

This paper provides the first monographic account of the genus Hydrolithon Foslie (1909) along the Atlantic and Caribbean coast of Mexico. We found five species of this genus including two new records for this region: H. onkodes (Heydrich) D.Penrose et Woelkerling and H. reinboldii (Weber van Bosse et Foslie) Foslie. The most common species in the study area was H. farinosum (J.V.Lamouroux) D.Penrose et Y.M.Chamberlain. H. onkodes and H. pachydermum (Foslie) J.C.Bailey, J.E.Gabel et D.W.Freshwater were compared with lectotype specimens. All species may be differentiated between them on the basis of the next characteristics: 1) Habit: with or lacking protuberances, free or attached; 2) Thallus construction: monomerous or dimerous; 3) Basal region: unistratose or multistratose; 4) Trichocytes: scattered or in horizontal or vertical rows or large pustulous fields; 5) Pore canal cells: shape. Morphological, anatomical and reproductive accounts are provided, including keys, information on distribution, habitat and nomenclature.

Keywords : Coralline; Hydrolithon; non-geniculate; taxonomy; distribution.

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