Genotypic diversity of Dictyosphaerium-morphospecies (Chlorellaceae, Trebouxiophyceae) in African inland waters, including the description of four new genera.

Abstract

Abstract:Trebouxiophytes of the Dictyosphaerium-morphotype from inland waters of Africa were studied using a polyphasic approach of SSU and ITS rDNA phylogeny, secondary structure of the ITS and observations made with a light microscope. Although the morphological criteria for differentiating species and genera are scarce, the genetic diversity of these algae was very high. Based on our genetic analysis findings, we described four new genera containing five new species: Compactochlorella dohrmannii, Compactochlorella kochii, Kalenjinia gelatinosa, Marasphaerium gattermannii and Masaia oloidia. Diversity and distribution of Chlorella-related colonial chlorophytes in the tropical and temperate zones were compared and discussed.

Selenastraceae (Sphaeropleales, Chlorophyceae): rbcL, 18S rDNA and ITS-2 secondary structure enlightens traditional taxonomy, with description of two new genera, Messastrum gen. nov. and Curvastrum gen. nov.

“…Except for Ourococcus GroBéty representatives of all the other ten genera were represented in our phylogenetic study as well as in other previous studies (Fučíková et al 2014;krienitz & Bock 2012).…”

“…The strain Ankistrodesmus nannoselene (SAG 202.6), a halfmoon-shaped or croissant-shaped solitary representative, seem to be related to Kirchneriella species and is not clearly positioned in Selenastraceae (Bock et al 2011a;krienitz & Bock 2012).…”

“…However, our clusters are in agreement with previous studies in Selenastraceae (FaWley et al 2006;krienitz et al 2011;krienitz et al 2001), supporting the probability of the phylogenetic information on the branches, despite some low bootstrap values. Since the species concept proposed by mayr (1942) cannot be applied to coccoid green algae, limnologists adopted the morphological species concept using morphology based diacritical characteristics as a way to deal with this limitation (krienitz & Bock 2012).…”

Diversidad de microalgas y cianobacterias en muestras provenientes de diferentes provincias del Ecuador, destinadas a una colección de cultivos

“…y Aphanizomenon sp. (Krienitz et al, 2012;Krienitz et al, 2010). (Vincent, 2007) El estudio realizado formaliza la metodología para detectar las diferencias en cuanto a riqueza específica, permanencia, abundancia, sucesión de taxa, durante el proceso de aislamiento; adicionalmente permite recomendar que las muestras originales deben ser mantenidas como fuentes de reclutamiento de microorganismos.…”

Phylogenic Diversity and Taxonomic Problems of the Dictyosphaerium Morphotype within the Parachlorella Clade (Chlorellaceae, Trebouxiophyceae)

“…, ,; Krienitz et al. , ). Classical morphology‐based research previously placed this morphotype in the genera Dictyosphaerium and Dactylosphaerium Steinecke, with the genera differing in terms of whether or not the gelatinized strands are regularly organized (Hindák ).…”