Sexual Isolation in Parthenogenetic Pycnoscelus surinamensis and Application of the Name Pycnoscelus indicus to Its Bisexual Relative (Dictyoptera: Blattaria: Blaberidae: Pycnoscelinae)

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Abstract
The parthenogenetic and bisexual “forms” of the Surinam cockroach, Pycnoscelus surinamensis (L.) are considered sibling species, and Blatta indica F. is selected from the synonymy to represent the bisexual taxon from which the parthenogenetic P. surinamensis undoubtedly arose. Females of P. surinamensis are thelytokous; males are rarely produced parthenogenetically and are nonfunctional.