Revista de Biología Tropical Vol.27 (2)

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    Cariotipos de diez especies de serpientes costarricenses de la familia Viperidae
    (1979) Gutiérrez, José María; Taylor, Richard T.; Bolaños Herrera, Róger
    All the karyotypes of ten snake species of the family Viperidae from Costa Rica have a diploid number of 36 chromosomes, 16 macro- and 20 microchromosomes; females show an heteromorphism in the fourth pair. The karyological differences are restricted to the position of the centromere in the eighth chromosome pair and in the W-sex chromosome. The karyotypes of Bothrops asper, B. nigroviridis. B. schlegelii, B. nummifer, B. picadoi, B. nasutus and Crotalus durissus durissus are of an identical pattern, having a subtelocentric eighth pair and a submetacentric W-sex chromosome. The autosomal pattern of B. godmani and Lachesis muta stenophrys is similar to that of the above group, except that the W-sex chromosome is subelocentric. The karyotype pattern of B. lateralis is different from these in that it has a submetacentric eighth pair.