Unexpected diversity in Neelipleona revealed by molecular phylogeny approach (Hexapoda, Collembola)
Keywords:
Collembola, Neelidae, Megalothorax, Neelus, COX1, 16S, 28SAbstract
Neelipleona are the smallest of the four Collembola orders in term of species number with 35 species described worldwide (out of around 8000 known Collembola). Despite this apparent poor diversity, Neelipleona have a worldwide repartition. The fact that the most commonly observed species, Neelus murinus Folsom, 1896 and Megalothorax minimus Willem, 1900, display cosmopolitan repartition is striking. A cladistic analysis based on 16S rDNA, COX1 and 28S rDNA D1 and D2 regions, for a broad collembolan sampling was performed. This analysis included 24 representatives of the Neelipleona genera Neelus Folsom, 1896 and Megalothorax Willem, 1900 from various regions. The interpretation of the phylogenetic pattern and number of transformations (branch length) indicates that Neelipleona are more diverse than previously thought, with probably many species yet to be discovered. These results buttress the rank of Neelipleona as a whole order instead of a Symphypleona family.
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