Abstract
Seven European species of Psylliodes flea-beetles have been chromosomally analyzed. The range of diploid numbers in the nine presently known species is wide, from 20 to 36 chromosomes, but most species display 2n=34 and 16+XyP male karyotypic formula, which is presumably the ancestral value for the genus. Two species, P. dulcamarae and P. affinis, share a neoXY sex chromosome system, have lower diploid numbers than the remaining, and are probably derived by chromosome fusion events. Moreover, the presumed phylogenetic interrelationships based on chromosomes are in good agreement with the female spermathecal groups and with the choice of host-plant. P. dulcamarae shows a B-chromosome polymorphism having three different karyomorphs.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
