Megalopyge lapena
Schaus, 1896
Megalopyge lapena is a in the Megalopygidae, commonly known as flannel moths. The was described by Schaus in 1896 and is found in Mexico and southern Arizona. As with other members of the Megalopyge, the larval stage possesses venomous urticating spines concealed beneath dense hair-like setae.

Pronunciation
How to pronounce Megalopyge lapena: /ˌmɛɡəloʊˈpaɪdʒi ləˈpiːnə/
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Images
Distribution
Mexico and southern Arizona
Human Relevance
As with other Megalopyge , the caterpillars are presumed to possess venomous urticating spines that can cause painful stings, though specific documentation for M. lapena is lacking. Handling should be avoided.
Similar Taxa
- Megalopyge opercularisBoth are North American Megalopyge with venomous caterpillars; M. opercularis (puss caterpillar) occurs in the eastern and southern United States, while M. lapena is restricted to the southwestern United States and Mexico
- Megalopyge crispataBoth share the Megalopyge and possess the characteristic dense, hair-like setae concealing urticating spines in the larval stage; M. crispata occurs in eastern North America
More Details
Taxonomic note
Authority sometimes cited as Schaus, 1869 in some databases (e.g., NCBI), but 1896 is the accepted date per original description and Catalogue of Life.
Data limitations
Most biological details for this remain undocumented in published literature. The 65 iNaturalist observations suggest it is encountered infrequently, with limited natural history information available beyond basic distribution records.
Sources and further reading
- BugGuide
- GBIF taxonomy match
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
- Look but do not touch: puss caterpillar, Megalopyge opercularis; White flannel moth, Norape ovina; Io moth, Automeris io; buck moth Hemileuca spp.; and hag moth, Phobetron pithecium — Bug of the Week
- Megalopygidae | Beetles In The Bush
- Bug Eric: A Potential New Host Record for Calliephialtes grapholithae (Hymenoptera: Ichneumonidae) from a Paper Wasp nest (Hymenoptera: Vespidae: Polistes metricus)