Arrhenotoky

Arrhenotoky (from Greek ἄρρην árrhēn "male" and τόκος tókos "birth"), also known as arrhenotokous parthenogenesis, is a form of parthenogenesis in which unfertilized eggs develop into males.

In most cases, parthenogenesis produces exclusively female offspring, hence the distinction.

[2] In the most commonly used sense of the term, arrhenotoky is synonymous with haploid arrhenotoky or haplodiploidy: the production of haploid males from unfertilized eggs in insects having a haplodiploid sex-determination system.

[5] Arrhenotoky occurs in members of the insect order Hymenoptera (bees, ants, and wasps)[6] and the Thysanoptera (thrips).

[7] The system also occurs sporadically in some spider mites, Hemiptera, Coleoptera (bark beetles), Scorpiones (Tityus metuendus) and rotifers.