Holarctic-genus
Guides
Arpedium schwarzi
Arpedium schwarzi is a rove beetle (Staphylinidae: Omaliinae: Anthophagini) belonging to the Schwarzi species group within the genus Arpedium. It is an eastern North American species with a distribution spanning the eastern United States and southeastern Canada. The species was described by Fauvel in 1878 and has been subject to taxonomic revision, with lectotype designation and redescription in recent studies.
Calaphis neobetulella
Blotched River Birch Aphid
Calaphis neobetulella is an aphid species described by Quednau in 1971, commonly known as the Blotched River Birch Aphid. It belongs to the genus Calaphis within the subfamily Calaphidinae. The species has been documented in very few iNaturalist observations, suggesting it may be uncommon, geographically restricted, or under-recorded. As a member of the Aphididae, it is a sap-feeding insect likely associated with birch host plants.
Callomyia venusta
flat-footed fly
Callomyia venusta is a species of flat-footed fly in the family Platypezidae, first described by Snow in 1894. It belongs to a small family of flies characterized by their distinctive flattened tarsi. The species has been documented in the northeastern United States, with records from Vermont. Like other members of the genus Callomyia, it likely shares the family's typical morphology and ecological associations, though specific details about its biology remain poorly documented.
Ellescus michaeli
Ellescus michaeli is a weevil species described in 2023 from the genus Ellescus, a group of small to medium-sized weevils in the family Curculionidae. The species is known from a single iNaturalist observation, indicating it remains poorly documented in the scientific literature. As a recently described taxon, its biology and ecology have not been formally studied. The genus Ellescus is distributed across the Holarctic region, with species often associated with herbaceous vegetation.
Oresbius fulvibasis
Oresbius fulvibasis is a species of ichneumon wasp in the family Ichneumonidae, described by Townes in 1962. It belongs to the genus Oresbius, a group of parasitoid wasps whose biology remains poorly documented. The species epithet 'fulvibasis' refers to a tawny or yellowish coloration at the base of some body part, likely the abdomen or legs. Like other members of Ichneumonidae, it is presumed to be a parasitoid of other insects, though specific host records for this species are not established.
Tragosoma soror
Tragosoma soror is a species of longhorned beetle in the family Cerambycidae, subfamily Prioninae, described by Laplante in 2017. It belongs to a genus containing other large, wood-boring beetles. The species is known from very few records, with only a single observation documented on iNaturalist. Like other members of Tragosoma, it likely develops in coniferous wood, though specific biological details remain undocumented in the available literature.