Perilampus prothoracicus
Smulyan, 1936
Perilampus prothoracicus is a small in the Perilampidae, measuring 1.3–5.5 mm in length. The exhibits the family's characteristic hyperparasitic lifestyle, with larvae typically parasitizing other parasitoid insects. Females broadcast on vegetation, and the resulting mobile larvae actively seek by attaching to moving objects.
Pronunciation
How to pronounce Perilampus prothoracicus: /ˌpɛrɪˈlæmpəs proʊˌθɔːˈreɪsɪkəs/
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Identification
Distinguished from similar small cuckoo wasps (Chrysididae) by triangular or inverted pyramid-shaped with sharp corners, versus oval or rounded abdomen without sharp corners. Short, strongly elbowed also characteristic. May be found in similar situations to cuckoo wasps, particularly around colonies or extrafloral of sunflowers.
Habitat
Found on vegetation including sunflower plants where feed on extrafloral and honeydew . laid on leaves, buds, bark cracks, and under lichens.
Distribution
Canada: recorded from Alberta, British Columbia, New Brunswick, and Ontario.
Seasonality
Active in summer; observed at extrafloral and colonies during this period.
Host Associations
- Tachinidae - larval (secondary)tachinid fly larvae parasitizing other insects
- Ichneumonidae - larval (secondary)ichneumon larvae within caterpillars or other insect larvae
- Braconidae - larval (secondary)braconid larvae within caterpillars or other insect larvae
Life Cycle
Female broadcasts 500+ on vegetation. Mobile larva hatches and attaches to moving objects with . Successful larvae penetrate secondary , then locate and enter primary host (a of the secondary host). Larva waits until primary host pupates, then exits and into -like external-feeding parasite. Two to three additional instars before pupating inside host cocoon or .
Behavior
imbibe sweet from plant stems and extrafloral . larvae actively seek by attaching to any moving object. Hyperparasitic lifestyle involves locating hosts within hosts.
Ecological Role
Hyperparasitoid, regulating of primary such as tachinid flies, ichneumon wasps, and braconid wasps. Contributes to complex trophic cascades in insect .
Similar Taxa
- Chrysididae (cuckoo wasps)Similar size, metallic coloration, and occurrence around colonies and extrafloral ; distinguished by oval or rounded without sharp corners versus triangular abdomen in Perilampidae
More Details
Taxonomic uncertainty
Classification of Perilampidae has been disputed; variously treated as own or lumped with Pteromalidae. Chrysolampinae often placed in Pteromalidae by some authorities.
Life cycle plasticity
Some Perilampus can complete as primary of secondary when primary hosts are absent; whether P. prothoracicus shares this trait is not confirmed.