Oak-aphid
Guides
Myzocallis
Oak and Chestnut Aphids
Myzocallis is a genus of aphids (Aphididae) comprising over 40 species with diverse host associations. Species feed on woody plants including oaks (Quercus), chestnuts (Castanea), hazelnuts (Corylus), myrtle (Myrica), and milkweeds (Apocynaceae). The genus exhibits host-specificity at the species level, with some taxa restricted to single host genera. Several species are minor agricultural pests, particularly of hazelnut and chestnut. The genus has a cosmopolitan distribution with notable diversity in the Palearctic region.
Myzocallis agrifolicola
California Oak Aphid
Myzocallis agrifolicola is a species of oak-feeding aphid described by Richards in 1966. It is the type species for the subgenus Californicallis within the genus Myzocallis (Aphididae: Calaphidinae). The species is associated with oak trees (Quercus) in western North America, particularly California.
Myzocallis atropunctata
Myzocallis atropunctata is a species of aphid in the family Aphididae, described by Quednau in 1997. It belongs to the genus Myzocallis, which comprises small, often brightly colored aphids associated with trees and shrubs. Species in this genus are typically found on Fagaceae hosts, particularly oaks (Quercus spp.). The specific epithet 'atropunctata' refers to dark punctate markings. As a member of the Calaphidinae subfamily, it shares characteristics with other oak-feeding aphids including specialized mouthparts for phloem feeding and complex life cycles often involving host alternation or anholocyclic development on evergreen oaks.
Myzocallis granovskyi
Longtailed oak aphid
Aphid species in the genus Myzocallis, described by Boudreaux and Tissot in 1962. Taxonomic placement has been revised, with some sources placing it in the genus Lineomyzocallis. Known from limited observations; biological details remain poorly documented.
Myzocallis walshii
Black-bordered oak aphid
Myzocallis walshii is a North American aphid species that has established in Europe as an invasive pest of American red oak (Quercus rubra). Native parasitoids in the northeastern Iberian Peninsula have adapted to this introduced aphid. The species has been recorded across much of North America and has spread to at least 15 European countries.
Neosymydobius albasiphus
White-cornicled Oak Aphid
Neosymydobius albasiphus is a North American aphid species originally described by Davis in 1914. It belongs to a small genus of six species associated with oak trees (Quercus spp.). The species has been redescribed in taxonomic revision of the genus. Common name refers to distinctive white cornicles.