Title
**Tursiocola podocnemicola** sp. nov., a new epizoic freshwater diatom species from the Rio Negro in the Brazilian Amazon Basin **Tursiocola podocnemicola** sp. nov., a new epizoic freshwater diatom species from the Rio Negro in the Brazilian Amazon Basin
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Bristol ,
Subject
Biology
Source (journal)
Diatom research / International Society for Diatom Research. - Bristol
Volume/pages
27(2012) :1 , p. 1-8
ISSN
0269-249X
ISI
000301922000001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Tursiocola podocnemicola sp. nov. is described from the Amazonian Rio Negro Basin in Brazil where it was found living epizoically on the carapaces of the freshwater turtle Podocnemis erythrocephala Spix. The detailed morphology of this epizoic diatom is examined using both light and scanning electron microscopy and compared with similar species of the genera Tursiocola Holmes, Nagasawa & Takano and Epiphalaina Holmes, Nagasawa & Takano. Specimens of this epizoic diatom belong to the genus Tursiocola, characterized by the presence of extensive pseudosepta, covering part of the apices and continuing along the mantle margin to merge with the stauros, uniseriate striae and two knob-like structures between the internal central raphe endings. However, the new species has a different external raphe structure when compared with all other species described from the mentioned genera, with unilaterally, strongly deflected, proximal raphe endings. The ecology and possible origin of the species on the Amazonian turtle's carapace is briefly discussed.
E-info
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