Open AccessPhylogenetic relationships and genetic distances between some monostiliferous interstitial nemerteans ( Ototyphlonemertes , Hoplonemertea, Nemertea) indicated from the 16S rRNA gene
Author(s) -
ENVALL MATS,
SUNDBERG PER
Publication year - 1998
Publication title -
zoological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.148
H-Index - 83
eISSN - 1096-3642
pISSN - 0024-4082
DOI - 10.1111/j.1096-3642.1998.tb01295.x
Subject(s) - biology , paraphyly , monophyly , phylogenetic tree , sister group , evolutionary biology , zoology , genetic divergence , genetics , gene , clade , population , genetic diversity , demography , sociology
Part of the 16s rRNA mitochondrial gene is used to reconstruct the relationships within five populations (representing three currently recognized species) of interstitial nemerteans ( Ototyphlonemertes , Hoplonemertea, Nemertea), and to assess genetic divergence between representatives of these populations. The non‐helicophoran individuals form a monophyletic sister‐group to the helicophoran taxon, which further resolves a previous hypothesis based on morphological characters. The small nucleotide differences between some of the populations are within levels expected for panmictic populations and fail to distinguish them genetically; without applying a phylogenic perspective, some of the populations may be allocated into paraphyletic species assemblages.