Adela flammeusella

Chambers, 1876

Fairy Longhorn Moth

Adela flammeusella is a of fairy longhorn moth in the Adelidae, characterized by the extremely long typical of this group. Males possess antennae up to three times the length of the forewings, while females have antennae roughly twice as long. The species was described by V.T. Chambers in 1876 and is restricted to the Pacific coastal region of western North America.

Adela flammeusella by (c) Ken-ichi Ueda, some rights reserved (CC BY). Used under a CC-BY license.

Adela flammeusella 3337968 by Ken-ichi Ueda. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Adela flammeusella: /əˈdɛlə flæmjuˈsɛlə/

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Identification

The combination of extremely long (especially in males), small size (5–6 mm forewing length), and metallic purple hindwings distinguishes this from other micro- in its range. The geographic restriction to cismontane California and southern Washington helps separate it from eastern North American Adela species such as A. caeruleella. Within California, it may occur with A. trigrapha; precise differentiation between these species requires examination of genitalia or detailed wing pattern analysis.

Images

Appearance

Small with forewing length of 5–6 mm. Both sexes possess metallic purple hindwings. Males have approximately three times the forewing length; females have antennae approximately twice the forewing length. The forewings are narrow and elongated. The metallic coloration on the hindwings is a distinctive feature of this within its range.

Habitat

Found in foothills and interior valleys of cismontane California, extending north to southern Washington. Specific microhabitat preferences are not well documented, but related in the are associated with deciduous woodlands, forest edges, and areas where larval plants occur.

Distribution

to western North America. Range extends from southern Washington south through the foothills and interior valleys of most of cismontane California. The does not occur east of the Cascade-Sierra Nevada divide.

Seasonality

are active from late March to early June. This spring period corresponds with the flowering period of suspected larval plants in the Orthocarpus and Castilleja.

Host Associations

Orthocarpus - probable larval Larvae probably feed on various ; based on inference from related species and association
Castilleja - probable larval Larvae probably feed on various ; based on inference from related species and association

Ecological Role

have been observed nectaring on flowers. As with other Adelidae, the larvae are likely case-bearers that feed on living plant tissue. The specific ecological role in native plant has not been studied.

Similar Taxa

Adela trigraphaOccurs in California; similar size and general appearance; requires genitalia examination or detailed wing pattern analysis for reliable separation
Adela caeruleellaEastern North American with similar and metallic coloration; distribution (east of the Rocky Mountains) provides primary separation
Nemophora fasciellaEuropean fairy longhorn moth with similar extremely long in males; distinguished by geographic range and wing pattern

More Details

Taxonomic history

Originally described by Vactor Tousey Chambers in 1876. The was included in Powell's 1969 synopsis of Nearctic adelid .

Research needs

Larval remains poorly known; plant associations are inferred rather than confirmed. No detailed studies of mating , oviposition, or larval case construction have been published for this .