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Original Articles

LICMOPHORA FLABELLATA: ULTRA STRUCTURE AND TAXONOMY I. IMPLICATION

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Pages 403-408 | Published online: 31 Oct 2011
 

Abstract

Several specimens of Licmophora flabellata (Carmichael ex Greville) C. Agardh from Bahía San Antonio, Río Negro, Argentina, were examined using light and scanning electron microscopy. There were several rimoportulae per valve, distributed one in the base and the others adjacent to the axial area. Comparison with the type material of the species and with slides of the Tempère and Peragallo Collection has allowed the specific diagnosis to be emended. Differences found between the Licmophora species that have been studied by us and by other authors suggest that Licmophora should be split into two. The distribution pattern of rimoportulae known up to the present for the family Diatomaceae was enlarged.

Numerosos especímenes de Licmophora flabellata (Carmichael ex Greville) C. Agardh, provenientes de Bahía San Antonio, Provincia de Río Negro, Argentina, fueron examinados utilizando microscopio óptico y microscopio electrónico de barrido. De este modo file detectada la presencia de numerosos procesos labiados por valva distribuídos uno en la base y los restantes adyacentes al area axial. El material bajo estudio rue comparado con el material tipo de la especie y con material de la Colección Tempère y Peragallo. A la luz de los resultados obtenidos la diagnosis especifica es enmendada.

Por otro lado, dadas las diferencias encontradas entre Licmophora flabellata (Carmichael ex Greville) C. Agardh y las otras especies de Licmophora C. Agardh estudiadas por Wahrer, Fryxell y Cox (1985) es recomendada la escisión de este género en dos generos y es ampliado el patrón de distribución de procesos labiados conocido hasta el presente para la Fam. Diatomaceae.

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