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Coral Reefs

, Volume 27, Issue 4, pp 789-794

Mitochondrial sequences of Seriatopora corals show little agreement with morphology and reveal the duplication of a tRNA gene near the control region

  • J.-F. FlotAffiliated withUMR UPMC-CNRS-MNHN-IRD 7138, Département Systématique et Evolution, Muséum National d’Histoire Naturelle Email author 
  • , W. Y. LicuananAffiliated withBiology Department and Shields Marine Station, De La Salle University—Manila
  • , Y. NakanoAffiliated withSesoko Station, Tropical Biosphere Research Center, University of the Ryukyus
  • , C. PayriAffiliated withUMR 7138, IRD, BP A5Université de la Polynésie Française
  • , C. CruaudAffiliated withGENOSCOPE, Centre National de Séquençage
  • , S. TillierAffiliated withUMR UPMC-CNRS-MNHN-IRD 7138, Département Systématique et Evolution, Muséum National d’Histoire Naturelle

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Abstract

The taxonomy of corals of the genus Seriatopora has not previously been studied using molecular sequence markers. As a first step toward a re-evaluation of species boundaries in this genus, mitochondrial sequence variability was analyzed in 51 samples collected from Okinawa, New Caledonia, and the Philippines. Four clusters of sequences were detected that showed little concordance with species currently recognized on a morphological basis. The most likely explanation is that the skeletal characters used for species identification are highly variable (polymorphic or phenotypically plastic); alternative explanations include introgression/hybridization, or deep coalescence and the retention of ancestral mitochondrial polymorphisms. In all individuals sequenced, two copies of trnW were found on either side of the atp8 gene near the putative D-loop, a novel mitochondrial gene arrangement that may have arisen from a duplication of the trnW-atp8 region followed by a deletion of one atp8.

Keywords

Cnidaria Scleractinia Taxonomy Systematics Mitochondrial genome