Conchylodes octonalis
Zeller, 1873
Eight-barred Lygropia Moth
Conchylodes octonalis, described by Zeller in 1873, is a small snout moth in the Crambidae. It occurs across western and central North America in low-elevation arid environments. The is named for the eight dark transverse bars on its wings. are active from late March through October, and larvae feed on Heliotropium curassavicum.
Pronunciation
How to pronounce Conchylodes octonalis: /kɒnˈkaɪloʊdiːz ɒkˈtoʊnəlɪs/
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Identification
The eight transverse wing bars distinguish this from other Conchylodes species and most other small crambid . Forewing length of 7.5–8.5 mm provides a size reference. Similar species Conchylodes ovulalis (zebra conchylodes moth) has zebra-like striping rather than transverse bars. Examination of genitalia may be required for definitive identification of some specimens.
Appearance
Small snout moth with forewings measuring 7.5–8.5 mm. Wings display eight distinct dark transverse bars against a lighter background, giving rise to the . Typical crambid body plan with elongated labial palps forming a 'snout' projection. Coloration and pattern provide camouflage against bark and vegetation in arid .
Habitat
Low-elevation arid areas including desert scrub, dry grasslands, and semi-arid open woodlands. Associated with supporting the larval plant Heliotropium curassavicum.
Distribution
North America from central and southern California eastward to Texas, with scattered records north to Iowa and east to Tennessee. Documented from California, Nevada, New Mexico, Texas, Oklahoma, Iowa, Mississippi, and Tennessee.
Seasonality
on wing from late March to October. Extended season suggests multiple or continuous in favorable conditions.
Diet
Larvae feed on Heliotropium curassavicum (seaside heliotrope), a herb in the borage .
Host Associations
- Heliotropium curassavicum - larval food plant herb in Boraginaceae; also known as seaside heliotrope or salt heliotrope
Ecological Role
Larval herbivore on Heliotropium curassavicum. Role in as prey for birds, spiders, and other . likely serve as when visiting flowers.
Human Relevance
No significant economic importance. Occasionally encountered by entomologists and naturalists in arid western . Not known to be a pest of agricultural or horticultural significance.
Similar Taxa
- Conchylodes ovulalisSimilar size and , but distinguished by zebra-like longitudinal striping rather than transverse bars; also known as zebra conchylodes moth
More Details
Taxonomic history
Described by German entomologist Philipp Christoph Zeller in 1873. The specific epithet 'octonalis' refers to the eight (octo-) wing bars. The Conchylodes contains multiple North American with patterned wings, many with descriptive referencing their appearance.