Full text in pdf format

Cytogenetic analysis of three species of Trypoxylon (Trypoxylon) (Hymenoptera, Sphecidae, Larrinae)

Luiz Fernando Gomes; Silvia das Graças Pompolo; Lucio Antonio de Oliveira Campos

Departamento de Biologia Geral, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brasil. Send correspondence to L.F.G.

ABSTRACT

We describe the karyotypes of three species of wasps of the genus Trypoxylon (Trypoxylon), T. sp1 (2n = 32, 2K = 24A + 8SM), T. asuncicola (2n = 32, 2K = 22A + 9SM + 1M), and T. fabricator (2n = 32, 2K = 12A + 18SM + 2M). Tandem growth of constitutive heterochromatin and pericentric inversions after the occurrence of centric fission are discussed as mechanisms for karyotype differentiation among the three species.

Keywords: cytogenetic; Trypoxylon.

REFERENCES

Bohart, R.M. and Menke, A.S. (1976). Sphecidae Wasps of the World: A Generic Revision. Univ. Calif. Press, Berkeley, pp. 695.

Costa, M.A., Melo, G.A.R., Pompolo, S.G. and Campos, L.A.O. (1993). Karyotypes and heterochromatin distribution (C-band patterns) in three species of Microstigmus wasps (Hymenoptera, Sphecidae, Pemphredoninae). Brazil. J. Genetics 15: 923-926.

Hoshiba, H. and Imai, H.T. (1993). Chromosome evolution of bees and wasps (Hymenoptera, Apocrita) on the basis of C-banding pattern analyses. Jpn. J. Ent. 61: 465-492.

Imai, H.T. (1969). Karyological studies of Japanese ants I. Chromosome evolution and species differentiation in ants. The Science Report of the Tokyo Kyoiku Daigaku. Sect. B.14 (206): 27-46.

Imai, H.T., Maruyama, T. Gojobori, Y.I. and Crozier, R.S. (1986). Theoretical bases for karyotype evolution. I. The minimum-interaction hypothesis. Am. Nat. 128: 900-920.

Imai, H.T., Taylor, R.W., Crosland, M.W.J. and Crozier, R.H. (1988). Modes of spontaneous chromosomal mutation and karyotype evolution in ants with reference to the minimum interaction hypothesis. Jpn. J. Genet. 63: 159-185.

Pompolo, S.G. and Takahashi, C.S. (1990). Chromosome numbers and C-banding in two species of the genus Polistes (Hymenoptera, Polistinae, Polistini). Insectes Sociaux 37: 251-257.

Richards, O.W. (1934). The American species of the genus Trypoxylon. Trans. R. Ent. Soc. Lond. 82: 173-362.

Sumner, A.T. (1972). A simple technique for demonstrating centromeric heterochromatin. Exp. Cell. Res. 75: 304-306.