Cosmopterix nitens
Walsingham, 1889
Cosmopterix nitens is a small in the Cosmopterigidae, with measuring 3.8-4.5 mm in length. The is to the southeastern and south-central United States, ranging from coastal South Carolina to southwestern Texas, with an established in Michigan. are on Phragmites australis (common reed), creating distinctive gallery mines 3-7 cm long. Adults are in the southern part of their range but likely in Michigan, flying from March through October.
Pronunciation
How to pronounce Cosmopterix nitens: /kɒzˈmɒptərɪks ˈnaɪtɛnz/
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Identification
can be distinguished from other Cosmopterix by the combination of: bronze with strong golden gloss; the presence of both an oblique metallic at one-quarter and a transverse fascia beyond the middle bordered by metallic fasciae; the broad blackish-brown streak with reddish gloss in the middle of the transverse fascia; and the metallic streak. The specific pattern of markings on the legs and also aids identification. Larval mines on Phragmites australis with piled at the end and expelled from an opening at that end are characteristic.
Habitat
Associated with stands of Phragmites australis (common reed), the larval . occur in where this plant grows, including wetlands, marshes, and riparian areas.
Distribution
United States: coastal South Carolina to southwestern Texas; established in Michigan.
Seasonality
from March and April until October. in the southern part of range; probably in Michigan.
Diet
feed on Phragmites australis (common reed), mining the leaves. do not feed (mouthparts reduced or non-functional in this ).
Host Associations
- Phragmites australis - larval mine leaves of this .
Life Cycle
mine leaves of Phragmites australis, creating gallery mines 3-7 cm long. is piled at the end of the mine and expelled from an opening at that end. The larva moves along the mine when disturbed. It hibernates in its inside the mine. occurs within the cocoon inside the mine. emerge and from spring through fall, with multiple per year in the south.
Behavior
are mobile within their mines, moving along the mine when disturbed. are active during daylight hours ().
Ecological Role
on Phragmites australis. Role in dynamics of wetland dominated by this is poorly studied.
Human Relevance
No significant direct human relevance. Not a pest of economic importance. May serve as an for wetland with Phragmites stands.
Similar Taxa
- Other Cosmopterix speciesMany Cosmopterix share similar size and general appearance; precise identification requires examination of pattern details, particularly the arrangement and color of metallic and the presence/absence of specific markings.
More Details
Taxonomic history
Described by Walsingham in 1889. The has been subject to detailed morphological description by modern , particularly for the stage.
Population dynamics
The Michigan represents a range extension from the main southeastern/south-central distribution, possibly facilitated by human transport of material or natural events.