Allygidius
Ribaut, 1948
Species Guides
1Allygidius is a of leafhoppers (Cicadellidae) established by Ribaut in 1948. The genus occurs in Europe and North America, with recorded from Britain, Greece, and other European countries. One species, A. commutatus, has been sequenced as part of the Darwin Tree of Life project, yielding the first -level assembly for the genus. Species in this genus are free-living on leaf surfaces and feed on plant sap.
Pronunciation
How to pronounce Allygidius: //ˌæ.lɪˈdʒɪd.i.əs//
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Identification
Historically confused with the Allygus due to similar vertex and markings; reliably distinguished by male genitalia structure. A. commutatus specifically has been noted for this diagnostic difference.
Habitat
Trees and shrubs, sometimes grassland. Larvae occur on grasses, on deciduous trees. Both life stages remain free on leaf surfaces rather than being endophytic.
Distribution
Europe (including Britain: England north to South Yorkshire and Northamptonshire, Monmouthshire in Wales; Greece; Denmark; Norway; Sweden) and Northern America. Distribution is locally patchy within this range.
Seasonality
Active June to September (based on A. commutatus records from Britain).
Diet
Sap-sucking. Larvae feed on grasses: Brachypodium pinnatum, Calamagrostis arundinacea, Calamagrostis epigeios, and Melica uniflora. feed on deciduous trees: Populus tremula, Quercus, Ulmus, and Betula pendula.
Host Associations
- Brachypodium pinnatum - larval plantgrass
- Calamagrostis arundinacea - larval plantgrass
- Calamagrostis epigeios - larval plantgrass
- Melica uniflora - larval plantgrass
- Populus tremula - plantdeciduous tree
- Quercus - plantdeciduous tree
- Ulmus - plantdeciduous tree
- Betula pendula - plantdeciduous tree
Life Cycle
Larval and stages. Larvae feed on grasses; adults feed on deciduous trees, representing a shift between life stages.
Behavior
Free-living on leaf surfaces; not endophytic (does not live within plant tissues).
Ecological Role
Sap-sucking insect; component of leafhopper on trees, shrubs, and grassland.
Human Relevance
Subject of genomic research: A. commutatus was sequenced by the Darwin Tree of Life project, producing the first high-quality -level assembly for the (1,796.07 Mb, 10 chromosomes including X ).
Similar Taxa
- AllygusSimilar vertex and markings caused historical confusion; Allygidius differs in male genitalia structure.
More Details
Genomic resources
-level assembly available for A. commutatus: 1,796.07 Mb (haplotype 1), 1,786.69 Mb (haplotype 2), mitochondrial genome 17.75 kb. Specimen from Wytham Woods, Oxfordshire, UK.
Taxonomic history
established by Ribaut, 1948. include A. abbreviatus (Lethierry, 1878), A. alanensis (Gnezdilov, 1997), A. anatomarius (Dlabola, 1980), and A. commutatus (Fieber, 1872).