Idiogramma
Förster, 1869
Species Guides
1Idiogramma is a of ichneumonid wasps and the sole extant genus in the tribe Idiogrammatini. The genus contains three described : I. comstockii, I. elbakyanae, and I. euryops. It belongs to the Tryphoninae within the large Ichneumonidae.
Pronunciation
How to pronounce Idiogramma: /ˌɪdi.əˈɡræmə/
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Identification
Members of Idiogramma can be distinguished from other Tryphoninae by the unique combination of tribal characters defining Idiogrammatini, including specific features of the areolet (a in the forewing venation) and ovipositor structure. The is characterized by having a complete areolet and specific modifications to the propodeum. Detailed identification requires examination of wing venation patterns and abdominal segmentation.
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Distribution
of Idiogramma have been recorded from North America (I. comstockii, I. euryops) and Mexico (I. elbakyanae). The appears to have a Nearctic distribution with limited geographic range.
Ecological Role
As members of the Ichneumonidae, Idiogramma are presumed to be , though specific records are not documented in available sources. The Tryphoninae generally parasitizes larvae (Hymenoptera: ), but this host relationship has not been confirmed for Idiogramma specifically.
Similar Taxa
- Other Tryphoninae generaIdiogramma is distinguished from other Tryphoninae by its tribal placement in Idiogrammatini, which is characterized by specific wing venation features including a complete areolet and particular propodeal not found in other tribes of the .
- Idiogramma comstockii vs. I. euryopsThese two North American require careful examination of morphological details for separation; I. elbakyanae is distinguished by its Mexican distribution and was described based on specific structural differences from the other two species.
More Details
Taxonomic history
The was established by Förster in 1869. Cushman (1942) reviewed the synonymy of the genus, clarifying boundaries. The most recent species, I. elbakyanae, was described in 2017 from Mexico, indicating ongoing taxonomic work on this poorly known genus.
Rarity
With only three observations recorded in iNaturalist and few literature records, Idiogramma appears to be rarely encountered or undercollected. This may reflect genuine rarity, cryptic habits, or limited sampling effort in appropriate .