Exelastis rhynchosiae
Snout-bean Plume Moth
Exelastis rhynchosiae is a small in the Pterophoridae, restricted to sandy-soil in Arkansas and Florida. are active from April through November and have a wingspan of 12–18 mm. The is closely associated with its plants, Rhynchosia cinerea and possibly Rhynchosia latifolia.
Pronunciation
How to pronounce Exelastis rhynchosiae: /ɛksɛˈlæstɪs rɪŋˈkɒsiaɪ/
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Identification
Distinguished from other Exelastis by geographic restriction to Arkansas and Florida sandy and association with Rhynchosia plants. Definitive identification requires examination of genitalia or molecular analysis; superficial resemblance to other small plume moths is high.
Appearance
Small with wingspan of 12–18 mm. As a member of Pterophoridae, wings are characteristically divided into lobes with fringed margins. Specific coloration and pattern details for this are not documented in available sources.
Habitat
Restricted to dry or well-drained sandy soils including pine flatwoods, pine-turkey oak sandhills, sandy open areas of high live oak hammocks, and sand pine-evergreen scrub on ancient dunes. specificity is driven by presence of plants.
Distribution
Known from Arkansas and Florida, United States. Range appears limited to these two states based on current records.
Seasonality
on wing from April to November. No information available on larval or number of per year.
Diet
Larvae feed on Rhynchosia cinerea; Rhynchosia latifolia is a possible additional . feeding habits are not documented.
Host Associations
- Rhynchosia cinerea - larval confirmed
- Rhynchosia latifolia - larval possible , not confirmed
Ecological Role
As a herbivore on Rhynchosia , likely contributes to of these leguminous plants in sandy-soil . Role in as prey for is presumed but undocumented.
Human Relevance
No documented economic or cultural significance. The ' restricted requirements make it potentially vulnerable to habitat loss from development or fire suppression in sandhill and scrub .
Similar Taxa
- Other Exelastis speciesMorphologically similar; require genitalia dissection or molecular methods for reliable differentiation. Geographic and specificity may aid field separation where ranges do not overlap.
- Other small PterophoridaeShare divided wing and small size; identification to level requires knowledge.
More Details
Conservation note
The highly specific requirements—dependence on ancient dune systems and particular sandy soil —suggest this may be sensitive to habitat fragmentation and alteration. No formal conservation status has been assessed.
Taxonomic history
The specific epithet 'rhynchosiae' directly references the plant Rhynchosia, indicating early recognition of this close plant-insect association.