Dolichomitus pterelas
(Say, 1829)
A in the Ichneumonidae, characterized by an exceptionally long ovipositor used to reach larvae concealed deep within wood. The exhibits aposematic coloration with metallic blue-black body and golden-yellow wings. It is a solitary parasitoid of wood-boring insect larvae.
Pronunciation
How to pronounce Dolichomitus pterelas: //ˌdɒlɪˈkɒmɪtəs ˈtɛrɪləs//
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Identification
Distinguished from by its combination of large body size, metallic blue-black coloration with golden-yellow wings, and extremely elongated ovipositor. The long ovipositor is diagnostic for the Dolichomitus and distinguishes it from other ichneumonid genera with shorter ovipositors. Specific identification from other Dolichomitus requires examination of morphological details not covered in available sources.
Habitat
Forest environments, particularly areas with standing or fallen wood containing wood-boring insect larvae. Associated with tree trunks and decaying wood where larvae develop.
Distribution
Recorded from Canada (Edmonton, George L) and present in Norway and Sweden. The appears to have a Holarctic distribution pattern, though specific range boundaries are not well documented in available sources.
Host Associations
- Wood-boring insect larvae - Lays single on larva deep within tree trunks; larva consumes host as it develops
Life Cycle
Solitary development: female deposits single on larva using long ovipositor inserted through wood; larva hatches and feeds internally on host, eventually killing it; occurs within host gallery or nearby wood.
Behavior
Females use their elongated ovipositor to probe holes and cracks in wood to locate concealed larvae. The striking metallic coloration is believed to function as aposematic (warning) coloration, deterring avian by signaling unpalatability or danger.
Ecological Role
agent of wood-boring insects; regulates of saproxyic larvae and other wood-inhabiting insects.
Human Relevance
Potential value in forestry for natural suppression of wood-boring pest ; of interest to entomologists and biodiversity researchers due to its distinctive .
Similar Taxa
- Dolichomitus meii with similar large size, metallic blue-black body, and golden wings; D. pterelas differs in distribution (Holarctic vs. Neotropical) and specific morphological details
- Other Dolichomitus speciesShare elongated ovipositor and wood- ; require detailed morphological examination for separation