Ctenopelmatini
Genus Guides
4Ctenopelmatini is a tribe of ichneumonid wasps within the Ichneumonidae. Members are whose larvae develop within or on organisms. The tribe is characterized by specific morphological traits of the forewing venation and ctenopelmatine-type ovipositor structure. Ctenopelmatini are primarily associated with hosts (), distinguishing them ecologically from many other ichneumonid tribes. The tribe is relatively small and poorly documented compared to larger ichneumonid tribes.
Pronunciation
How to pronounce Ctenopelmatini: /kˌtɛnəˌpɛlməˈtaɪni/
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Identification
Ctenopelmatini can be distinguished from other ichneumonid tribes by the presence of a ctenopelmatine-type ovipositor, which has a distinctive arrangement of valves. The forewing typically displays characteristic venation including a closed areolet . Members lack the glyptal-type or xylonomine-type ovipositor structures found in related tribes. The propodeum often shows a particular pattern. These are generally medium-sized ichneumonids with relatively robust bodies compared to slender-bodied tribes like Phygadeuontini.
Habitat
Found in supporting their , including forests, woodlands, and areas with abundant woody vegetation. Occurs in both coniferous and deciduous forest systems where sawfly larvae feed on trees and shrubs.
Distribution
Recorded from the Holarctic region, with occurrences in North America and Eurasia. Distribution follows that of their . Specific range boundaries are poorly documented due to limited sampling and taxonomic study.
Seasonality
activity coincides with the larval development periods of their , primarily during spring and summer months. Exact timing varies by latitude and host .
Diet
Larvae are endoparasitoids or ectoparasitoids of larvae (Hymenoptera: ). diet unknown; likely feeds on nectar or honeydew like other ichneumonid wasps, though this has not been documented.
Host Associations
- Symphyta - larval ; primarily larvae on trees and shrubs
Life Cycle
Complete with , larval, pupal, and stages. Females oviposit into or onto larvae. Larvae develop within or externally on the , eventually killing it. occurs in the host remains or in the soil.
Behavior
Females actively search vegetation for larvae as . Oviposition involves precise placement of using the specialized ovipositor. Solitary development; multiple eggs may be laid but typically one individual completes development per host.
Ecological Role
agents regulating in forest and woodland . May influence in situations.
Human Relevance
Potential value in of pest affecting forestry and agriculture. Not directly harmful to humans; stinging apparatus reduced and not used defensively.
Similar Taxa
- LycorininiBoth are tribes within Ichneumonidae associated with ; distinguished by ovipositor structure and forewing venation details
- EuryproctiniSimilar associations and general ; separated by propodeal and ovipositor type