Full text in pdf format

Comparative cytogenetic studies of two karyomorphs of Trichomys apereoides (Rodentia, Echimyidae)

Emygdia Rosa Leal-Mesquita^I; Valéria Fagundes^II; Yatiyo Yonenaga-Yassuda^II;
Pedro Luis Bernardo da Rocha^III

^IDepartamento de Biologia, Universidade Federal do Maranhão, São Luis, MA, Brasil
^IIDepartamento de Biologia, Instituto de Biociências, USP, Caixa Postal 11461, 05422-970 São Paulo, SP, Brasil. Send correspondence to Y.Y.Y.
^IIIDepartamento de Zoologia, Instituto de Biociências, USP, São Paulo, SP, Brasil

ABSTRACT

Two different karyotypes of Trichomys apereoides (2n - 30, FN - 54 and 2n - 26, FN - 48) are described, using GTG-, CBG-, RBG-banding and silver staining techniques. A comparative G-banding pattern analysis between the karyomorphs suggested that they represent two different species.

Keywords: Cytogenetic; Trichomys apereoides; Rodentia.

REFERENCES

Cabrera, A. (1961). A catalog of South American mammals. II. (Sirenia, Perissodactyla, Artiodactyla, Lagomorpha, Rodentia, Cetacea). Rev. Mus. Argent. Cient. Nat. "Bernardino Rivadania "Inst. Nac. Invest. Cienc. Nat. Zool. 6: 309-732.

Dutrillaux, B. and Couturier, J. (1981). La pratique de l'analyse chromosomique. Masson S.A., Paris, pp. 84.

Dutrillaux, B., Couturier, J., Richer, C.L. and Viegas-Pequignot, E. (1976). Sequence of DNA replication in 277 R- and G-bands of human chromosomes using a BrdU treatment. Chromosoma 58: 51-61.

Honacki, J.H., Kinman, K.E. and Koeppl, J.W. (1982). Mammal species of the World. Allen Press, USA, pp. 629.

Leal-Mesquita, E.R., Yonenaga-Yassuda, Y., Chu, T.H. and Rocha, P.L.B. (1992). Chromosomal characterization and comparative cytogenetic analysis of two species of Proechimys (Echimyidae, Rodentia) from the Caatinga domain of the State of Bahia, Brazil. Caryologia 45: 197-212.

Petter, F. (1973). The names of the genera Cercomys, Nelomys, Trichomys and Proechimys (Rodentia, Echimyidae). Mammalia 37: 422-426.

Redford, K.H. and Fonseca, G.A.B. (1986). The role of gallery forests in the zoogeography of the cerrado's non volant mammalian fauna. Biotropica 18: 126-135.

Sbalqueiro, I.J., Bueno, A.M.S., Moreira, J., Ramos, A.P.D., Padovani, C., Ximemez, A. and Agostini, J.M.S. (1988). Cariótipo com 96 cromossomos em Echimys dasythrix (Rodentia, Echimyidae), o mais elevado número diplóide entre os mamíferos. In: XV Congresso Brasileiro de Zoologia. Curitiba, PR, Brazil, January 1-February 5, pp. 532.

Souza, M.J. and Yonenaga-Yassuda, Y. (1982). Chromosomal variability of sex chromosomes and NOR's in Trichomys apereoides (Rodentia, Echimyidae). Cytogenet. Cell Genet. 33: 197-203.

Souza, M.J. and Yonenaga-Yassuda, Y. (1984). G- and C-band pattern and nucleolus organizer regions in somatic chromosomes of Clyomys laticeps laticeps (Rodentia, Echimyidae). Experientia 40: 96-97.

Svartman, M. (1989). Levantamento cariotipico de roedores da região do Distrito Federal. Master's Thesis, USP, São Paulo.

Yonenaga-Yassuda, Y., Souza, M.J., Kasahara, S., L'Abatte, M. and Chu, T.H. (1985). Supernumerary system in Proechimys iheringi iheringi (Rodentia, Echimyidae), from state of São Paulo, Brazil. Caryologia 38: 174-194.

Zanchin, N.I.T. (1988). Estudos cromossômicos em Orizominos e Equimideos da Mata Atlântica. Master's Thesis, UFRGS, Porto Alegre, Brazil.