Karyotypes of the neotropical pseudoscorpions Semeiochernes armiger and Cordylochernes scorpioides (Pseudoscorpiones: Chernetidae)
2009
Abstract
The karyotypes and course of meiosis of two pseudoscorpions, Semeiochernes armiger and Cordylochernes scorpioides (Pseudoscorpiones: Chernetidae), are described for the first time. The diploid chromosome number of the male is 69 in S. armiger and 47 in C. scorpioides.
As in most pseudoscorpions studied to date, autosomes exhibit predominantly biarmed morphology. Both species possess an X0 sex chromosome system.
In most pseudoscorpions with X0 system karyotyped so far, including European chernetids, X chromosome exhibits metacentric morphology. In contrast to this, X chromosome of both studied neotropical chernetids exhibit asymmetric morphology of the X chromosome that is submetacentric.