Resumo

RODRIGUEZ REYES, JULIO CÉSAR et al. Pterocladiella caerulescens (Kützin) Santelices & Hommersand (RHODOPHYTA),  A NEW ADDITION TO THE PHYCOLOGICAL FLORA OF  NUEVA ESPARTA STATE (VENEZUELA). Saber [online]. 2016, vol.28, n.4, pp.713-719. ISSN 1315-0162.

The  rhodophyte  alga,  Ptercoladiella  caerulescens  has  been  little  studied  in  Venezuela,  even  though  its  high production  of  agar  has  been  globally  determined.  The  vegetative  and  reproductive  structures  (cystocarp, tetrasporangio  and  espermatangio)  were  studied  in  a  population  of  P.  caereluscens  located  in  rocky  intertidal substrates from Boca de Rio Bay in Margarita Island, Venezuela, during November 2013 to May 2014. A sample of two hundred specimens forming clusters was collected with attachment structures, detaching them with a knife and spatula, preserving them in a solution of 4% formaldehyde with seawater and stored in glass bottles. Analysis of female individuals with an optical microscope determined the presence of a lonely cystocarp with an unilocular placenta  and  carpogonium  in  the  center  of  the  cavity, permitting  to  identify  the  specie  as  Pterocladiella caerulescens (Kutzin) & Hommersand Santelices, belonging to the family of Pterocladiaceae. This species had not been recorded in the coastal marine zone of Nueva Esparta state, being first identified in Falcon and Carabobo states, then in Sucre state, so this record expands its area of distribution in Venezuela.

Palavras-chave : Pterocladiaceae; morphology; reproductive structures; Margarita Island..

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