A revision of the genus Geitlerinema and a description of the genus Anagnostidinema gen. nov. (Oscillatoriophycidae, Cyanobacteria)

Abstract

Abstract:The simple filamentous cyanobacterial genus Geitlerinema is heterogeneous. At least two distinct phylogenetic clades can be derived from the set of most common freshwater Geitlerinema species. Our revision is based on the original description of the type species G. splendidum aka Oscillatoria spendida and on molecular sequencing of morphologically relevant strains. The revised Geitlerinema contains only one species according to morphological similarity with its original description. Consequently, the majority of other freshwater species inferred from molecular sequencing of 16S rRNA gene and 16S-23S ITS analysis (related both genetically and morphologically to G. pseudacutissimum) must be classified as a special taxon on the generic level. The name Anagnostidinema is proposed for this genus, which was selected in memory of the prominent late cyanobacterial specialist Konstantinos Anagnostidis. The genetic position, short review and characteristics of the newly defined genus Anagnostidinema is presented in this paper. The taxonomy of the rest of species (including the marine taxa), which are currently unable to be classified taxonomically with certainty, remain to be resolved in future studies.

Morphological and genetic characterization of marine filamentous cyanobacterium Geitlerinema isolated from Thailand

“…PCC7105, recognized as the reference strain for the marine species of this genus according to Bergey's Manual 1 . This clade was phylogenetically distant from other freshwater Geitlerinema clades which are consistent with previous reports 19,32 . Recently, Strunecký and coworkers revised the genus of Geitlerinema that Geitlerinema splendidum was only one species according to the morphological similarity with its origin description but other Geitlerinema or Leptolyngbya species was proposed to transfer into Anagnostidinema gen. nov. 32 .…”

“…This clade was phylogenetically distant from other freshwater Geitlerinema clades which are consistent with previous reports 19,32 . Recently, Strunecký and coworkers revised the genus of Geitlerinema that Geitlerinema splendidum was only one species according to the morphological similarity with its origin description but other Geitlerinema or Leptolyngbya species was proposed to transfer into Anagnostidinema gen. nov. 32 . Our result and the previous study clearly demonstrated that marine Geitlerinema is phylogenetically distant from other freshwater Geitlerinema and might be separated into other genera of cyanobacteria.…”

“…3). The third clade was composed of many strains of freshwater Geitlerinema species and Leptolyngbya species which were recently designated as Anagnostidinema pseudacutissimum and A. amphibium 32 (Fig. 3).…”

Nodosilinea chupicuarensis sp. nov. (Leptolyngbyaceae, Synechococcales) a subaerial cyanobacterium isolated from a stone monument in central Mexico

“…Unfortunately, this circumscription is so broad that numerous genetically distinct strains and species were assigned to Leptolyngbya based on morphology, even though recent phylogenetic studies have demonstrated that the genus is polyphyletic and in need of taxonomic revision , Osorio-Santos et al 2014. This revisionary work has commenced, and over a dozen novel genera have been split out of Leptolyngbya thus far (Abed et al 2002, Turicchia et al 2009, Perkerson et al 2011, Taton et al 2011, Zammit et al 2012, Dadheech et al 2012, Vaz et al 2015, Song et al 2015a, 2015b, Miscoe et al, 2016, Sciuto et Moro 2016, Sciuto et al 2017, Strunecký et al 2017.…”

In Vitro Anti-Inflammatory Activity of Blue-Green Algae-Geitlerinema Splendidum Collected From Western Ghats, South India

“…Cells are 2-4 times longer than wide. The salient diacritic feature is the morphology of trichomes without sheaths [19]. The morphological description G. splendidum has not yet been clearly published, although the images and phylogeny were documented in Hasler et al [20].…”