Corioxenidae

Definition

A family of twisted-wing parasitoids (order Strepsiptera) whose species develop as endoparasites within heteropteran bugs, notably members of Pentatomidae, Scutelleridae, Coreidae, and related families. Adult males are free-living, lack mandibles, and possess reduced tarsi; females remain neotenic and larval, residing permanently within the host. The family is divided into three subfamilies—Corioxeninae, Triozocerinae, and Uniclavinae—distinguished primarily by male tarsal segmentation and claw morphology.

Etymology

Example

Triozocera and Corioxenos are representative genera whose males emerge from stink bugs (Pentatomidae) to seek mates, while the legless, worm-like females release brood through a genital opening in the host's abdominal wall.

Related Terms

• Strepsiptera
• heteropteran bugs
• Pentatomidae
• Neoteny
• endoparasitoid
• tarsi
• Kinzelbach

Usage Notes

The family is distinguished from other strepsipteran families (e.g., Stylopidae, Xenidae) by host association with true bugs rather than bees, wasps, or leafhoppers, and by the mandible-less condition of adult males. Subfamily identification requires examination of male tarsal structure: Corioxeninae have four tarsomeres with paired claws, Triozocerinae have three tarsomeres with paired claws, and Uniclavinae have three tarsomeres with a single claw.