History and classification
''Brevivulva electroma'' is known only from one fossil, the holotype, number "AMNH BaJWJ-408", which is a single female specimen preserved near the end of a triangular amber block in size. The block is currently residing in the American Museum of Natural History paleoentomology collections in New York City. ''B. electroma'' was first studied by Gary A.P. Gibson, with his 2009 Type (biology), type description being published in the journal ''ZooKeys''. The genus, generic name combines the Latin words ''brevis'', meaning "short", and ''vulva'', meaning "cover" or "wrapper" and refers to the short length of the hypopygium in comparison to the modern genus ''Lambdobregma''. The specific epithet "''electroma''" derives from the Latin ''electrum'' "amber".Description
''Brevivulva electroma'' is in length when the ovipositor is included and is a uniform dark color with a faint metallic green cast to the mesosoma at certain angles. Several areas on the female are obscured, with the mouth, lower half of the face and underside of the gaster to the rear of the hypopygium having thin coatings of white mold. The forewings are uniformly hyaline in coloration and highly setae, setose along the front edge of the wing margin in the costal cell. Beyond the parastigma the setae grow sparse and the wing apex is apparently bare. The overall structure of and general appearance is very similar to that of living species in the genus ''Lambdobregma''. This includes ''Brevivulva'' having a prepectus which is notably an elongate triangular shape and that narrows quickly towards the rear. However, a number of features set ''Brevivulva'' and ''Lambdobregma'' apart. Most distinctly ''Lambdobregma'' possesses a hypopygium which extends almost all the way to the tip of the gaster, whereas the hypopygium in ''Brevivulva'' extends only half the length of the gaster. Due to the stiff, exerted shape of the ovipositor sheath, Gibson postulated that ''Brevivulva electroma'' was parasitic on woodboring beetles or other hosts with similar habits of concealment.References
{{Taxonbar, from=Q4962594 Eocene insects Prehistoric insects of Europe Fossil taxa described in 2009 Hymenoptera of Europe Monotypic Hymenoptera genera, † Prehistoric Hymenoptera genera Baltic amber