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Calochaete gen. nov. (Cyanobacteria, Nostocales), a new cyanobacterial type from the “páramo” zone in Costa Rica

TOMÁŠ HAUER, MARKÉTA BOHUNICKÁ, RADKA MÜHLSTEINOVÁ

Abstract


A new tapered and false branched morphotype of filamentous heterocytous cyanobacterium was isolated from soil material collected on a massif of Chirripó Mountain, Costa Rica. The strain was analyzed morphologically and a sequence of its 16S rRNA gene was compared with available 16S rDNA sequences of organisms with similar morphology, especially those with heteropolar tapering filaments. Phylogenetic analyses revealed that the strain was significantly different from Rivulariaceae, but was closely related to several strains designated as Tolypothrix. However, according to the original descriptions in the literature, members of the genus Tolypothrix possess only very slightly tapering filaments. With regard to all these differences, we decided to describe a new genus—Calochaete gen. nov. with type species C. cimrmanii.


Keywords


16S-23S ITS, 16S rRNA gene, Central America, Cyanoprokaryota, Microchaetaceae, morphology, new genus, taxonomy

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DOI: http://dx.doi.org/10.11646/phytotaxa.109.1.4

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand