Estudios cariológicos de cinco especies de serpientes costarricenses de la familia colubridae
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| Autores: | , , |
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| Formato: | artículo original |
| Fecha de Publicación: | 1984 |
| Descripción: | The karyotypes of five species of colubrid snakes from Costa Rica are as follows: Imuntodes cenchao and Drymobius margaritiferus have a diploid number of 36, with 16 macro- and 20 microchromosomes. The fourth pair is heteromorphic in females of I. cenchoa, with a metacentric Z and a submetacentric W chromosomes. Karyotypes of Erythrolampius bizonus and Leimadophis epinephalus have 28 chromosomes, without a clearcut separation between macro- and microchromosomes. In the case of E. bizomus, the fourth pair contains the sex chromosomes Z and W, both are submetacentric, but the W is smaller. Xenedon rabdocephalus has a diploid number of 34 chromosomes (22 macro- and 12 microchromosomes); pair 3 is heteromorphic in femaJes, with a submetacentric Z and a smaller metacentric W. The karyotype of X. rabdocephalus may be derived from a primitive karyotype by means of reduction in the number of microchromosomes and centric fissions of two pairs of metacentric autosomes. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/29129 |
| Acceso en línea: | http://www.revistas.ucr.ac.cr/index.php/rbt/article/view/24621/24825 https://hdl.handle.net/10669/29129 |
| Palabra clave: | Serpientes Animals Chordates Vertebrates Reptiles Chromosome Number Karyotypes |