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Lacey, KMJ,McCormack, GP,Keegan, BF,Powell, R
2005
September
Marine Biology
Phylogenetic relationships within the class Holothuroidea, inferred from 18S rRNA gene data
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MOLECULAR PHYLOGENY MAXIMUM-LIKELIHOOD MITOCHONDRIAL-DNA ECHINODERMATA SEQUENCE
147
1149
1154
This molecular phylogenetic analysis of 18S ribosomal RNA (18SrDNA) gene sequences from 16 species of holothurold, suggests strong support for an alternative taxonomic scheme to replace the existing classification. When trees drawn from the 18S rDNA data were constrained to show expected relationships between the holothourid orders, they were significantly worse than the best tree under SH tests. These analyses indicated strongly that the subclass Aspidochirotacea is paraphyletic. Sequences from the order Dendrochirotida grouped with aspidochiroitid sequences, with high bootstrap support, to the exclusion of the elasipod sequence. In line with recent morphological studies the order Apodida were a basal sister group to the other three holothuroid orders examined and the Dendrochirotida was a derived holothuroid order.
DOI 10.1007/s00227-005-0009-2
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