Chromosome fusion

Chromosomal characteristics and karyotype evolution of Oxyopidae spiders (Araneae, Entelegynae)

L. M. Stávale, Schneider, M. C., Brescovit, A. D., and Cella, D. M., Chromosomal characteristics and karyotype evolution of Oxyopidae spiders (Araneae, Entelegynae), vol. 10, pp. 752-763, 2011.

We made a cytogenetic analysis of four species of Oxyopidae and compared it with the karyotype data of all species of this family. In Hamataliwa sp, the mitotic cells showed 2n♂ = 26+X1X2 and telocentric chromosomes. The 2n♂ = 28, which has been described for only one oxyopid spider, is the highest diploid number reported for this family. Peucetia species exhibited distinct karyotype characteristics, i.e., 2n♂ = 20+X1X2 in P. flava and 2n♂ = 20+X in P. rubrolineata, revealing interspecific chromosome variability within this genus.

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