Megalopyge pyxidifera
Smith & Abbot, 1797
Yellow Flannel Moth
Megalopyge pyxidifera, commonly known as the , is a of flannel moth in the . Described from the southern United States in 1797, this species belongs to a whose are known for their dense, hair-like that conceal venomous urticating . The of related Megalopyge species are among the most venomous caterpillars in North America, capable of delivering painful .



Pronunciation
How to pronounce Megalopyge pyxidifera: /ˌmɛɡəloʊˈpaɪdʒiː pɪkˈsɪdɪfɪərə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Megalopyge pyxidifera can be distinguished from the more widely known M. opercularis (puss /southern ) by geographic distribution and subtle morphological differences. M. pyxidifera has been described from the southern United States, while specific range overlap details are not well documented. of Megalopyge generally require close examination of or pattern details for definitive identification. The caterpillars of all Megalopyge species share the characteristic dense, hair-like covering that conceals stinging , making them hazardous to handle.
Images
Habitat
Based on related and characteristics, Megalopyge pyxidifera likely inhabits areas with its plants, which may include various such as oaks, hickories, and other trees. The locality and specific preferences are not well documented in available sources.
Distribution
Described from the southern United States. Specific range boundaries and detailed distribution records are sparse in available literature.
Behavior
are presumably , as is typical for the . Larval specific to M. pyxidifera is not documented separately from . of related are generally solitary feeders on foliage.
Ecological Role
As a in its larval stage, this contributes to and serves as potential for various . The venomous of the provide defense against . Specific ecological interactions of M. pyxidifera are not documented.
Human Relevance
of Megalopyge , including likely M. pyxidifera, pose a medical concern due to their venomous urticating . Contact can cause immediate burning pain, localized swelling, redness, and blistering. allergic reactions may occur in sensitive individuals. Medical attention should be sought for or mucous exposure. The attractive, fuzzy appearance of the caterpillars can lead to accidental handling, particularly by children.
Similar Taxa
- Megalopyge opercularisThe southern or puss is the most well-known , sharing the dense hair-like covering and venomous . M. opercularis is more extensively documented and has a broader recognition, but the two may overlap in range and require careful examination for separation.
- Megalopyge crispataThe black-waved is another with similar larval —early appear as fluffy with venomous hairs. differ in pattern, with M. crispata showing distinctive black wavy across the wings.
More Details
Taxonomic Note
The was described by James Edward Smith and John Abbot in 1797, making it one of the earlier described species in the . The epithet has occasionally been misspelled or confused in literature.
Venomous Larvae
While specific documentation for M. pyxidifera is limited, all Megalopyge should be treated as potentially dangerous due to the 's characteristic urticating concealed beneath dense hair-like . The can cause significant pain and medical complications.
Sources and further reading
- BugGuide
- iNaturalist taxon
- 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)