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Molecular Phylogeny of Western Atlantic Farfantepenaeus and Litopenaeus Shrimp Based on Mitochondrial 16S Partial Sequences

✍ Scribed by Rodrigo Maggioni; Alex D. Rogers; Norman Maclean; Fernando D'Incao

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
103 KB
Volume
18
Category
Article
ISSN
1055-7903

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✦ Synopsis

Partial sequences for the 16S rRNA mitochondrial gene were obtained from 10 penaeid shrimp species: Farfantepenaeus paulensis, F. brasiliensis, F. subtilis, F. duorarum, F. aztecus, Litopenaeus schmitti, L. setiferus, and Xiphopenaeus kroyeri from the western Atlantic and L. vannamei and L. stylirostris from the eastern Pacific. Sequences were also obtained from an undescribed morphotype of pink shrimp (morphotype II) usually identified as F. subtilis. The phylogeny resulting from the 16S partial sequences showed that these species form two well-supported monophyletic clades consistent with the two genera proposed in a recent systematic review of the suborder Dendrobranchiata. This contrasted with conclusions drawn from recent molecular phylogenetic work on penaeid shrimps based on partial sequences of the mitochondrial COI region that failed to support recent revisions of the Dendrobranchiata based on morphological analysis. Consistent differences observed in the sequences for morphotype II, coupled with previous allozyme data, support the conclusion that this is a previously undescribed species of Farfantepenaeus.

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