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Karyotype study on pseudoscorpions of the genus Lasiochernes Beier (Pseudoscorpiones, Chernetidae)
Frantisek Stáhlavský1, Hans Henderickx, Jirí Král
1Department of Zoology, Faculty of Sciences, Charles University, Vinicná 7, CZ-128 44 Prague 2, Czech Republic. stahlf@natur.cuni.cz
Abstract:
Karyotypes of the genus Lasiochernes (Pseudoscorpiones, Chernetidae) are studied for the first time. The diploid chromosome numbers of males were found to be 2n = 61 in L. pilosus, 2n = 69 in L. siculus and 2n = 73 in L. cretonatus. Karyotypes of all species mainly consist of biarmed chromosomes; the sex chromosome system is XO. Remarkably, the X chromosome displays partial (L. cretonatus), or even total (L. pilosus), negative heteropycnosis during the spermatogonial metaphase.
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