Hyper-Cryptic Marine Meiofauna: Species Complexes in Nemertodermatida

摘要: Nemertodermatida are microscopically small, benthic marine worms. Specimens of two nominal species, Sterreria psammicola and Nemertinoides elongatus from 33 locations worldwide were sequenced for three molecular markers. Species delimitation validation was done using gene trees, haplotype networks multilocus Bayesian analysis. We found 20 supported species which nine: glandulosum n.sp., N. wolfgangi boucheti S. lundini martindalei monolithes papuensis variabilis n.sp. ylvae described including nucleotide-based diagnoses. The distribution patterns indicate transoceanic dispersal in some the species. Sympatric many cases. high level cryptic diversity this meiofauna group implies that may be higher than previously estimated.