Apparent Parthenogenesis in Pityophthorus puberulus (Coleoptera: Scolytidae)

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Abstract
No males were found among 559 specimens of Pityophthorus puberulus (LeConte) from several localities. No sperm was found in the spermatheca of 10 females taken from recently established galleries containing eggs and young larvae. This is the third record of thelytoky in a scolytid. The known distribution and environment of parthenogenetic populations of P. puberulus does not fit the usual patterns of distribution and environmental situations associated with parthenogenetic animals.

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