Agriotypinae is a subfamily of ichneumonid parasitoid wasps found in the Palaearctic region. This subfamily contains only one genus, Agriotypus. The known species are aquatic idiobiont ectoparasitoids of Trichoptera pupae.
| Agriotypinae | |
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| Agriotypus armatus from British Entomology | |
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| Subfamily: | Agriotypinae Haliday,1838
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There has been disagreement over the taxonomic placement of Agriotypus. It has variously been placed in Proctotrupoidea and considered a separate family of Ichneumonoidea.
Life cycle
editThe development of Agriotypus armatus has been documented on the host Silo pallipes in a stream in South-West England.[1] The life cycle of the wasps took one year, with adults present in May and June. Eggs were laid in the pupae or prepupae of the host. The larvae underwent 5 larval stages before overwintering as adults in their pupal case. Larval instars 1-4 fed externally on the host, while instar 5 rapidly consumed the entire host body. Before pupating, the larvae built a separate pupal case from silk within the trichopteran pupal case. The wasp pupal case included a 1.5 cm silk ribbon which extended into the water, probably to act as a plastron. Adults emerged in the spring, after the water temperature had reached 10 degrees C.
References
edit- ^ Elliott, J. M. (1982). "The Life Cycle and Spatial Distribution of the Aquatic Parasitoid Agriotypus armatus (Hymenoptera: Agriotypidae) and its Caddis Host Silo pallipes (Trichoptera: Goeridae)". Journal of Animal Ecology. 51 (3): 923–941. Bibcode:1982JAnEc..51..923E. doi:10.2307/4014. JSTOR 4014.
- Chao, H.F., and Y. Zhang. 1981. Two new species of Agriotypus from Jilin Province (Hymenoptera: Ichneumonoidea, Agriotypidae). Entomotaxonomia 3:79‑86.
External links
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