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A Cytogenetic Study of the Crayfish Procambarus Digueti (Bouvier, 1897) (Decapoda, Cambaridae) From Lake Camecuaro, Michoacan, Mexico

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This work was carried out to determine and describe the karyology and the ideogram of the crayfish, Procambarus digueti. A new technique for the cytogenetic study of freshwater Decapoda was adapted for these investigations. For P. digueti, the fundamental chromosome number is f.n. = 204, with a diploid number 2n = 102. The chromosomal formula is 35 mediocentrics (M), 15 metacentrics (m), and one submetacentric (St). We discuss the usefulness of cytogenetic methodology in discriminating closely related taxa, and, also, as a tool for supporting existing taxonomic criteria.

Affiliations: 1: Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autónoma de México, Apartado Postal 70-619, México 04511 D.F., Mexico; 2: Aquatic Collection, University of Alaska Museum, 907 Yukon Drive, Fairbanks, Alaska 99775-6960, U.S.A.; 3: Escuela Nacional de Estudios Profesionales Iztacala, Universidad Nacional Autónoma de México, Departamento de la Carrera de Biología, Los Reyes Iztacala, Estado de México, Mexico


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