Glyphomerus
Foerster, 1856
Glyphomerus is a of chalcidoid in the , Glyphomerinae. are of gall-forming insects, particularly cynipid wasps. At least one species, G. stigma, exhibits entomophytophagy, consuming gall tissue after feeding on larvae. The genus is distributed across the Palearctic and Nearctic regions, with documented associations with rose in the genus Diplolepis.
Pronunciation
How to pronounce Glyphomerus: /ˌɡlɪfoʊˈmɪərəs/
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Identification
Glyphomerus can be distinguished from other by features detailed in taxonomic keys to the Palearctic fauna. Specific diagnostic characters require examination of morphological details not extractable from available sources.
Habitat
Stem galls induced by cynipid , particularly those formed by Diplolepis on roses.
Distribution
Palearctic region (including Georgia); western North America (Nearctic). GBIF records indicate presence in Norway, Sweden, and Turkey.
Seasonality
Activity coincides with gall maturation; G. stigma attacks larvae when galls are maturing, distinct from earlier-season .
Diet
Entomophytophagous: larvae consume insect tissue, then feed on gall nutritive . G. stigma has been observed to induce formation of new nutritive cells in galls, which are subsequently consumed.
Host Associations
- Diplolepis triforma - koinobiont ectoparasitoid; attacks larvae in stem galls
Life Cycle
Koinobiont ectoparasitoid. Larvae develop externally on larvae within gall chambers. Kills host at gall maturation stage, then continues feeding on gall tissue.
Behavior
Modifies gall structure by inducing development of new nutritive after death, then consumes these cells. Timing of attack is later in the season compared to some co-occurring such as Eurytoma spongiosa.
Ecological Role
of gall-forming cynipid . Acts as entomophytophagous modifier of gall tissue, potentially influencing gall development and nutrient dynamics within the gall .
Similar Taxa
- Eurytoma spongiosaCo-occurs as in Diplolepis triforma galls but differs in timing (attacks earlier in season) and does not induce new nutritive formation
More Details
Taxonomic notes
The requires detailed examination for -level identification; keys to Palearctic species exist but were not accessible in full.
Research gaps
of most poorly known; associations and geographic distributions incompletely documented outside of G. stigma and G. flavabdomen.
Sources and further reading
- BugGuide
- GBIF taxonomy match
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
- Redescription and New Data on Distribution of Glyphomerus flavabdomen with Key to the Palearctic Species of the Genus Glyphomerus (Hymenoptera, Torymidae)
- UnrecognizedGlyphomerusspecies associated with gall wasps in western North America
- Modification of galls ofDiplolepis triforma(Hymenoptera: Cynipidae) by the parasitoidsEurytoma spongiosa(Hymenoptera: Eurytomidae) andGlyphomerus stigma(Hymenoptera: Torymidae)