First description of chromosomes in Pyrgomorpha vignaudii(Orthoptera: Pyrgomorphidae) collected from Cameroon



The karyotype and meiotic process in Pyrgomorpha vignaudii (Orthoptera: Pyrgomorphidae) are here described for the first time. Karyotypes were obtained from colchicine treated individuals of the species by the standard Lactopropionic Orcien squash technique. The species revealed a karyotype of 2n = 19 acrocentric chromosomes in males and the XX – XO sex determining mechanism. The chromosomes were distributed into two long, six medium and one short chromosome (2LL: 6MM: 1SS). The X chromosome was medium in size. Meiosis was normal and chiasmate. The information here provided increases the cytogenetic data base for Cameroonian Pyrgomorphidae.


Key words: Karyotype, meiosis, Pyrgomorpha vignaudii, Orthoptera, Pyrgomorphidae, Cameroon

Full Text:



White MJD. 1973. Animal cytology and Evolution. 3rd edition. Cambridge University Press. 961 pp.

Hewitt GM. 1979. Grasshoppers and Crickets. Animal cytogenetics. Insecta, I. Orthoptera. Vol. 3. Grebruger Borntraeger Ed. Berlin Stuttgart.

Santos JL, Arana P., Giraldez R. 1983. Genetica, 61: 65-74.

Seino RA, Dongmo A, Dongmo TI, Manjeli Y. 2013a. International Journal of Genetics and Molecular Biology, 5(2): 13 – 19. Doi:10.5897/IJGMB2013.0065.

Fossey A, Liebenberg H, Jacobs DH. 1989. Genetica, 78: 179 – 183.

Seino RA, Akongnui T. 2010.International Journal of Biological and Chemical Sciences. 4 (6): 1914-1921.

Williams GO, Ogunbiyi BI. 1995. Cytologia, 60: 111 – 116.

Levan A, Fredga K, Sandberg AA. 1964. Hereditas, 52: 201 – 220.

Mesa J, Fontanetti CS. (1983). Brazil J. Genet. 6(2):295-305.

Faluyi JO, Olorode O. 1988. Journal of African Zoology, 102: 475 – 480.

Bugrov G. 1996. Folia Biologica (Krakow), 44(1–2):15–25.

Bugrov G, Sergeev MG. 1997. Acta Zoologica Cracoviensia, 40: 47 – 52.

Seino RA, Manjeli Y, Focho DA, Shamb DN. 2007. International Journal of Biological and Chemical Sciences, 1 (2): 151 – 157.

Seino RA, Akongnui T, Dongmo NB, Manjeli Y. 2008. International Journal of Biological and Chemical Sciences. 2 (2): 168-174.

Seino RA, Dongmo TI. 2013b. Journal of Research in Biology, 3(4): 947 – 953.


  • There are currently no refbacks.

<Journal of Zoological and Bioscience Research>