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1 August 2000 A PRELIMINARY PHYLOGENETIC ANALYSIS OF METAPENAEOPSIS (DECAPODA: PENAEIDAE) BASED ON MITOCHONDRIAL DNA SEQUENCES OF SELECTED SPECIES FROM THE INDO-WEST PACIFIC
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Abstract

Phylogenetic relationships within Metapenaeopsis remain largely unknown. The modern revision of the genus suggests that the shape of the petasma, followed by the presence of a stridulating organ, are the most important distinguishing taxonomic features. In the present study, phylogenetic relationships were studied among seven Metapenaeopsis species from the Indo-West Pacific based on partial sequences of mitochondrial 16S rRNA and cytochrome c oxidase I (COI) genes. Mean sequence divergence was 6.4% for 16S and 15.8% for COI. A strikingly large nucleotide distance (10.0% for 16S and 16.9% for COI) was recorded between M. commensalis, the only Indo-West Pacific species with a one-valved petasma, and the other species with a two-valved petasma. Phylogenetic analyses using neighbor-joining, maximum parsimony, and maximum likelihood generated mostly identical tree topologies in which M. commensalis is distantly related to the other species. Two clades were resolved for the remaining species, one with and the other without a stridulating organ, supporting the main groupings of the recent taxonomic revision. Results of the present study also indicate that the deep-water forms represent a relatively recent radiation in Metapenaeopsis.

J. G. Tong, T-Y. Chan, and K. H. Chu "A PRELIMINARY PHYLOGENETIC ANALYSIS OF METAPENAEOPSIS (DECAPODA: PENAEIDAE) BASED ON MITOCHONDRIAL DNA SEQUENCES OF SELECTED SPECIES FROM THE INDO-WEST PACIFIC," Journal of Crustacean Biology 20(3), 541-549, (1 August 2000). https://doi.org/10.1651/0278-0372(2000)020[0541:APPAOM]2.0.CO;2
Received: 1 June 1999; Accepted: 8 February 2000; Published: 1 August 2000
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