Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

Abstract

Scytonematopsis KiseleVa is a poorly known cyanobacterial genus with a widespread, mostly tropical distribution. A new species, S. contorta, is described from the Hawaiian Island of Oahu based on morphological and molecular evidence. The new species was found growing on rock in damp aerial habitats proximal to streams and waterfalls. It differs in several regards to the other 14 species, in particular in its pronounced ability to produce a spirally contorted trichome within a single filament. The phylogenetic placement of the genus is uncertain. It is associated with both Rivularia and Calothrix species in the Rivulariaceae, and is distant from the Scytonemataceae, where it has traditionally been placed. However, the relationship of these taxa is unresolved, as there was very little support for the deeper nodes of the phylogeny.

Toxopsis calypsus gen. nov., sp. nov. (Cyanobacteria, Nostocales) from cave ‘Francthi’, Peloponnese, Greece: a morphological and molecular evaluation

“…Comparing the phenotypic and morphological features of Toxopsis gen. nov. with those of the other nostocalean genera, and especially the presence of isopolarity and heteropolarity as well as the vacuolized akinetes divided into two halves, it is clear that there is a closer relationship with the species Scytonematopsis contorta (Vaccarino & Johansen, 2011). However, there is a clear phylogenetic distance between the novel taxon proposed here and members of this species (similarity was ,90 %) according to molecular data (16S rRNA gene sequence analysis).…”

Biodiversity of soil cyanobacteria in the hyper‐arid Atacama Desert, Chile

“…, Johansen et al. , Vaccarino and Johansen , ). Amplifications from cultures yielded a 1,162 nt fragment of the 16S rRNA gene.…”

Morphological and Molecular Characterization of Brasilonema roberti-lamii (Cyanophyceae, Nostocales, Scytonemataceae), from Central Mexico

“…(known as the "polyphasic approach") has been proven to be adequate for the recognition and characterization of different taxa of cyanobacteria. The term "polyphasic" has been used in this sense by several researches (Flechtner et al 2002, González-Resendiz et al 2013, Komárek 2010, Vaccarino & Johansen 2011, 2012. The results reported by several authors (Wilmotte & Golubic 1991, Komárek 2006, 2010 show a clear relationship between the morphology and the DNA sequences of different genes within cyanobacteria, mainly the 16S rRNA.…”