Yet the widely accepted species concept of the time was faulty a pre-Darwinian view of species as fixed and eternal entities.
A neighbor-joining phylogenetic tree was constructed by using the ITS sequences of XG21 and other closely related fungal strains according to the GenBank database, which are the currently accepted species of Aspergillus section Nigri (Varga et al. 2011).
Consequently, the number of accepted species has varied widely.
The type and sole accepted species of Kentrosaurus is Kentrosaurus aethiopicus, named by Hennig in 1915.
Borchsenius and Bernal also described one new species, Aiphanes spicata, bringing the total number of accepted species to 22.
More recent research by Gary Nunn of the American Museum of Natural History (1996) and other researchers around the world studied the mitochondrial DNA of all 14 accepted species, finding four, not two, monophyletic groups within the albatrosses.
ILDIS synonymy was used to attach the accepted species name to each record.
Genetic taxonomic studies have suggested that the 8 currently accepted species, including the 2 marine mammal-associated species, represent a single species [6], [13].
Otherwise, the high similarity between all type strains is not surprising, since genetic taxonomic studies suggest that the 6 currently accepted species represent a single species [6], [13].
Another reason is that, despite suggestive signatures such as distinctive nucleotide composition or biased codon usage, the gold standard for identifying HGT remains phylogenetic incongruence of the suspected gene(s) with respect to the accepted species phylogeny.
With nearly 500 accepted species, Campanula L. is the largest Campanulaceae genus (Roquet et al., 2008).
