''Adactylidium'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
mite
Mites are small arachnids (eight-legged arthropods) of two large orders, the Acariformes and the Parasitiformes, which were historically grouped together in the subclass Acari. However, most recent genetic analyses do not recover the two as eac ...
s known for its unusual
life cycle. An impregnated female mite feeds upon a single
egg
An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the ...
of a
thrips
Thrips (Order (biology) , order Thysanoptera) are minute (mostly long or less), slender insects with fringed wings and unique asymmetrical mouthparts. Entomologists have species description , described approximately 7,700 species. They fly on ...
, rapidly growing five to eight female offspring and one male in her body. The single male mite mates with all his sisters when they are still inside their mother. The new females, now impregnated, eat their way out of their mother's body so that they can emerge to find new thrips eggs,
killing their mother in the process (though the mother may be only 4 days old at the time), starting the cycle again.
The male emerges as well, but does not look for food or new mates, and dies after a few hours.
See also
*
Telescoping generations
References
Trombidiformes genera
Parasites of insects
Incestuous animals
{{Trombidiformes-stub