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Characters of Taxonomic Value of the Postlarvae of the Shrimp Penaeus (Farfantepenaeus) Brevirostris Kingsley (Decapoda Natantia), of the Gulf of California, Mexico

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Planktonic postlarvae of 4 species of Penaeus from the coasts of the states of Sinaloa and Sonora, México, were examined. P. brevirostris postlarvae that carry 3 to 7 dorsal spines on rostrum and carapace are characterized by the presence of an antennal spine, which is absent in all other species. The value of other taxonomic characters for the separation of the postlarvae of the species are discussed; such characters are: the presence or absence of spinules on the 6th abdominal somite and on the epigastric and adrostral regions of the carapace, the length of the rostrum, the total body length, and the relation between the length of the eye and the rostral length.

Affiliations: 1: Instituto de Biología, Universidad Nacional Autónoma de México, Apartado Postal 70-153, México 20, D.F.


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