Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum

A new marine diatom, Pleurosigma guarreranum Sar, Sterrenburg & Sunesen, sp. nov., is described with light and electron microscopy from material collected in coastal waters of the Gulf of San Matías, Río Negro Province, Argentina. Pleurosigma guarreranum resembles P. exemptum and P. obesum from...

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Detalles Bibliográficos
Autores principales:	Sunesen, Inés, Sterrenburg, Frithjof A. S., Sar, Eugenia A.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2013
Materias:	Ciencias Naturales frustule new species Pleurosigma exemptum Pleurosigma guarreranum sp. nov. Pleurosigma obesum taxonomy type material ultrastructure
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/85321
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-85321
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales frustule new species Pleurosigma exemptum Pleurosigma guarreranum sp. nov. Pleurosigma obesum taxonomy type material ultrastructure
spellingShingle	Ciencias Naturales frustule new species Pleurosigma exemptum Pleurosigma guarreranum sp. nov. Pleurosigma obesum taxonomy type material ultrastructure Sunesen, Inés Sterrenburg, Frithjof A. S. Sar, Eugenia A. Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
topic_facet	Ciencias Naturales frustule new species Pleurosigma exemptum Pleurosigma guarreranum sp. nov. Pleurosigma obesum taxonomy type material ultrastructure
description	A new marine diatom, Pleurosigma guarreranum Sar, Sterrenburg & Sunesen, sp. nov., is described with light and electron microscopy from material collected in coastal waters of the Gulf of San Matías, Río Negro Province, Argentina. Pleurosigma guarreranum resembles P. exemptum and P. obesum from the Philippines. Isotypes of P. exemptum and P. obesum deposited in the Albert Mann Collection, National Museum of Natural History, Smithsonian Institution (US), were examined with light microscopy. The observations supported a previous suggestion to include P. obesum as a heterotypic synonym of P. exemptum, which has priority. Since there is no available unmounted original material of P. exemptum, a comparative light microscopical analysis of P. guarreranum and the type material of P. exemptum was made. Despite some similarities, there are subtle differences in morphometric data, valve outline, raphe sternum pattern, and morphology of the central area. But especially, the two species consistently differ in the angle of intersection of the oblique striae, justifying a separate taxonomic position. Pleurosigma guarreranum was also compared with another species belonging to the section Formosi, P. decorum, similar in valve outline, raphe sternum pattern and angle of intersection of the oblique striae.
format	Articulo Articulo
author	Sunesen, Inés Sterrenburg, Frithjof A. S. Sar, Eugenia A.
author_facet	Sunesen, Inés Sterrenburg, Frithjof A. S. Sar, Eugenia A.
author_sort	Sunesen, Inés
title	Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
title_short	Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
title_full	Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
title_fullStr	Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
title_full_unstemmed	Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum
title_sort	pleurosigma guarreranum, sp. nov. (pleurosigmataceae, bacillariophyta), from the gulf of san matías, argentina, and comparison with the allied species pleurosigma exemptum and p. obesum
publishDate	2013
url	http://sedici.unlp.edu.ar/handle/10915/85321
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Pleurosigma guarreranum, sp. nov. (Pleurosigmataceae, Bacillariophyta), from the Gulf of San Matías, Argentina, and comparison with the allied species Pleurosigma exemptum and P. obesum

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