Xorides stigmapterus
(Say, 1824)
Species Guides
2Xorides stigmapterus is a of ichneumonid in the Poemeniinae. It was first described by Thomas Say in 1824. Members of this are of wood-boring larvae. The species has been recorded in Canada, with specific locality data from Alberta.
Pronunciation
How to pronounce Xorides stigmapterus: //ˈksɔrɪdiːz stɪɡˈmæptərəs//
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Identification
-level identification of Xorides stigmapterus requires examination of wing venation, particularly the stigma and areolet characteristics, and antennal segment counts. The Xorides can be distinguished from related genera such as Podoschistus and Neoxorides by subtle differences in wing venation and body proportions. Accurate identification typically requires reference to specialized keys for Poemeniinae.
Habitat
Associated with forested containing dead or dying wood, which provides for its lifestyle. The Alberta records suggest or mixed forest environments.
Distribution
Recorded from Bilby and Edmonton, Alberta, Canada. Distribution data remain sparse; the likely occurs more broadly across North American forests where suitable are present.
Diet
Larvae are ectoparasitoids of wood-boring larvae. Specific records for X. stigmapterus are not documented, though and related in Poemeniinae parasitize Cerambycidae and Buprestidae.
Life Cycle
As with other Poemeniinae, the female locates larvae boring in wood and inserts her ovipositor through the substrate to deposit on the . The larva feeds externally on the beetle , eventually killing it. presumably emerge by chewing exit holes.
Behavior
Females have been observed searching on tree trunks, tapping with to detect vibrations of boring larvae. This -location is characteristic of the .
Ecological Role
Acts as a agent of wood-boring beetles, potentially regulating of cerambycid and buprestid beetles in forest .
Human Relevance
May contribute to suppression of pest in timber and urban forest settings, though direct economic impact is undocumented.
Similar Taxa
- Podoschistus vittifronsFormerly classified in Xorides; distinguished by wing venation details and antennal proportions. P. vittifrons is the only North American representative of its .
- Xorides peniculusCongeneric with similar -seeking on tree trunks; separation requires examination of wing stigma shape and body coloration patterns.
More Details
Taxonomic History
The classification of Poemeniinae has undergone repeated revision. Xorides stigmapterus has remained in Xorides, unlike some relatives transferred to Podoschistus or Neoxorides.
Observation Data
iNaturalist records 179 observations for the Xorides, though -level determinations are often tentative due to identification challenges.