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Diasemiopsis ramburialis · Order: Lepidoptera · Family: Crambidae
The moth has a wingspan of about 17 to 22 mm. Its caterpillars feed on the water-fern Azolla filiculoides.
Source: Wikipedia
How to recognize it
Diasemiopsis ramburialis belongs to the moth family Crambidae.
Source: Wikipedia
Size
Adults have a wingspan ranging from 17 to 22 mm.
Source: Wikipedia
Where it lives
The species occurs in most of Europe and many tropical areas such as the Azores, Fiji, New Zealand and Australia.
Source: Wikipedia
What it eats
Larvae have been recorded feeding on the water-fern Azolla filiculoides.
Source: Wikipedia
When you see it
In Britain it appears as a scarce migrant.
Source: Wikipedia
Where it comes from
Its range includes most of Europe and the tropics, covering places like the Azores, Fiji, New Zealand and Australia.
Source: Wikipedia
Where it is found in the US
Recorded in 14 of 51 states and DC. Most records: Florida, Texas, Louisiana, Alabama, South Carolina, Mississippi, Georgia, North Carolina.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Same family (Crambidae)
Box Tree MothCydalima perspectalisDamages trees, gardens or crops
Celery Leaftier MothUdea rubigalis
Elegant Grass-veneerMicrocrambus elegans
Hawaiian Beet Webworm MothSpoladea recurvalisDamages trees, gardens or crops
Garden Grass-veneerChrysoteuchia culmellaDamages trees, gardens or crops
Bluegrass Webworm MothParapediasia teterrellusDamages trees, gardens or cropsSources
- Wikipedia: https://en.wikipedia.org/wiki/Diasemiopsis_ramburialis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.