Phylogeny of Protostome Worms Derived from 18S RRNA Sequences

Overview

Journal Mol Biol Evol

Publisher Oxford University Press

Specialty Biology

Date 1995 Jul 1

PMID 7659019

Citations 13

Authors

B Winnepenninckx

T Backeljau

R De Wachter

Affiliations

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Abstract

The phylogenetic relationships of protostome worms were studied by comparing new complete 18S rRNA sequences of Vestimentifera, Pogonophora, Sipuncula, Echiura, Nemertea, and Annelida with existing 18S rRNA sequences of Mollusca, Arthropoda, Chordata, and Platyhelminthes. Phylogenetic trees were inferred via neighbor-joining and maximum parsimony analyses. These suggest that (1) Sipuncula and Echiura are not sister groups; (2) Nemertea are protostomes; (3) Vestimentifera and Pogonophora are protostomes that have a common ancestor with Echiura; and (4) Vestimentifera and Pogonophora are a monophyletic clade.

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