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Phylogenetic relationships within the class holothuroidea, inferred from 18S rRNA gene data
Lacey, K.M.J.; McCormack, G.P.; Keegan, B.F.; Powell, R. (2005). Phylogenetic relationships within the class holothuroidea, inferred from 18S rRNA gene data. Mar. Biol. (Berl.) 147(5): 1149-1154. http://dx.doi.org/10.1007/s00227-005-0009-2
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793
Peer reviewed article  
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  • Lacey, K.M.J.
  • McCormack, G.P.
  • Keegan, B.F.
  • Powell, R.
Abstract
    This molecular phylogenetic analysis of 18S ribosomal RNA (18SrDNA) gene sequences from 16 species of holothuroid, 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.
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