Cardiochilinae

Ashmead, 1900

Genus Guides

2

Cardiochilinae is a of braconid wasps comprising approximately 20 and 220+ . Members are solitary koinobiont endoparasitoids of Lepidoptera caterpillars. Females inject during oviposition to manipulate immune response. Some species, notably Toxoneuron nigriceps, have been employed in programs against agricultural pests.

Pronunciation

How to pronounce Cardiochilinae: /ˌkɑrdiˈokɪlɪniː/

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Identification

Distinguished from Microgastrinae by presence of r-m in forewing and more than 16 flagellomeres (Microgastrinae typically have fewer flagellomeres and lack r-m vein). Non-cyclostome condition separates from cyclostome braconid . Generic-level identification requires examination of propodeal areola structure, hind basitarsus shape, tarsal claw , and metasomal tergite .

Appearance

Non-cyclostome braconids with slender body form. Forewing possesses r-m (radiomedial crossvein). with more than 16 flagellomeres. General habitus similar to Microgastrinae but distinguished by wing venation and antennal segmentation.

Distribution

Worldwide distribution across all major biogeographic regions. Documented from Afrotropical, Australasian, Nearctic, Neotropical, Oriental, and Palearctic regions. occur in diverse ranging from lowland tropical wet forest (100 m elevation) to montane forests (1,500–1,700 m).

Host Associations

Life Cycle

Koinobiont endoparasitoid development: and larval stages completed within living caterpillar. Host continues feeding and developing during larval growth. Parasitoid emerges from host, which subsequently dies. Solitary development (one parasitoid per host).

Behavior

Females inject during oviposition; this virus suppresses immune response, enabling successful development. Specimens frequently collected using . Some exhibit elevation-associated melanism, with darker coloration at higher elevations.

Ecological Role

contributing to regulation of Lepidoptera . Functions as agent in natural and agricultural .

Human Relevance

Toxoneuron nigriceps and other utilized in biocontrol programs against lepidopteran crop pests. Schoenlandella species investigated for control of bitter gourd pests (Momordica charantia). Potential value in of agricultural systems.

Similar Taxa

  • MicrogastrinaeSimilar general appearance and shared koinobiont endoparasitoid lifestyle on Lepidoptera. Distinguished by absence of r-m in forewing and typically fewer than 16 flagellomeres.

More Details

Historical taxonomy

Previously treated as a tribe within Microgastrinae; elevated to status based on phylogenetic and morphological evidence.

Phylogenetic relationships

Systematic revision based on combined qualitative and morphometric characters recognizes 16 monophyletic , with six genera described as new in 1999.

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Sources and further reading