Tursiocola podocnemicola sp nov., a new epizoic freshwater diatom species from the Rio Negro in the Brazilian Amazon Basin

Autor(es)

Wetzel, Carlos E. ^{[1, 2]} ; Van de Vijver, Bart ^[3] ; Cox, Eileen J. ^[4] ; Bicudo, Denise de C. ^[1] ; Ector, Luc ^[2]

Afiliação do(s) autor(es)

^[1] Inst Bot, Secao Ecol, Sao Paulo, SP - Brazil

^[2] Publ Res Ctr Gabriel Lippmann, Dept Environm & Agrobiotechnol EVA, Grand Duchy - Luxembourg

^[3] Natl Bot Garden Belgium, Dept Bryophyta & Thallophyta, Meise - Belgium

^[4] Nat Hist Museum, Dept Bot, London SW7 5BD - England

• Tipo de documento: Artigo Científico
• Fonte: DIATOM RESEARCH; v. 27, n. 1, p. 1-8, 2012.
• Citações Web of Science: 20

Resumo

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. (AU)

• Processo FAPESP: 07/51360-6 - Biodiversidade e padrões de distribuição de diatomáceas (Ochrophyta: Bacillariophyceae) na Bacia Hidrográfica do Rio Negro, Amazonas, Brasil
• Beneficiário: Carlos Eduardo Wetzel
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto