Phylogenetic relationships among all described species and four subspecies
(total of 21 taxa) of the spiny lobster genus Panulirus
White, 1847, were examined with nucleotide sequence data from portions of two
mitochondrial genes, large-subunit ribosomal RNA (16S) and cytochrome oxidase
subunit I (COI). Multiple sequence alignments were subjected to
maximum-parsimony, neighbour-joining, and maximum-likelihood analysis with
Jasus edwardsii as the outgroup. Two major lineages
within Panulirus were recovered by all three methods for
both the 16S and COI alignments analysed separately and for the combined
alignment. The first lineage included all species of
Panulirus classified as Groups I and II by previous
morphologically based definitions. The second included all species classified
as Groups III and IV. Relationships within major lineages were not well
resolved; the molecular phylogeny did not support separation of Group I from
Group II or of Group III from Group IV. The degree of sequence divergence
between different pairs of species was higher in pairwise comparisons between
species in Group I/II (16S: 2.8–19.4%; COI:
12.4–31.8%) than in those between species in Group III/IV
(16S: 5.3–13.2%; COI: 12.6–19.6%). This pattern
suggests that the Group I/II lineage may represent an earlier radiation of
species within Panulirus.
Information C o m p a n y 3 0 0 North Z e e b R oad. Ann Arbor. Ml 4 8 1 0 6 -1 3 4 6 USA 3 1 3 /7 6 1 -4 7 0 0 8 0 0 /5 2 1 -0 6 0 0 Order N u m b er 9401567 G enetic p op u lation stru ctu re o f a sp ecies com p lex o f blue m ussels (Mytilus spp.)
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