Dasypyga alternosquamella
Ragonot, 1887
snout moth
A (: Phycitinae) to western North America. Described by Ragonot in 1887, this has evolved a strict ecological dependency on dwarf mistletoes (Arceuthobium). Its are obligate that mine mistletoe shoots, often killing the . The species represents a notable case of host-specific with measurable ecological impacts on mistletoe .
Pronunciation
How to pronounce Dasypyga alternosquamella: /ˌdæsɪˈpaɪgə æltərnoʊskwəˈmɛlə/
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Habitat
Associated with coniferous forests where dwarf mistletoe (Arceuthobium) parasitizes trees. Larval is within mistletoe shoots; habitat context poorly documented but presumably near host plants.
Distribution
Western North America. Specific range boundaries not well documented in available sources.
Diet
feed exclusively on dwarf mistletoe (Arceuthobium), specifically documented on Arceuthobium vaginatum subsp. cryptopodum and Arceuthobium campylopodum. First larvae consume flowers and shoot tips; later instars mine into shoots and feed internally. No diet documented.
Host Associations
- Arceuthobium vaginatum subsp. cryptopodum - larval documented ; mine shoots and consume internal tissues
- Arceuthobium campylopodum - larval documented ; mine shoots and consume internal tissues
- Arceuthobium - larval ( level) on dwarf mistletoes; specific associations may be broader than two documented
Life Cycle
(, , , ). Larvae through multiple . First instar feeds externally on flowers and shoot tips of dwarf mistletoe. Later instars transition to internal feeding, mining into mistletoe shoots from the base upward. site not documented in available sources.
Behavior
exhibit color plasticity: body color varies depending on the color of the mistletoe shoots they consume. Mining is destructive to plants, typically killing the mistletoe shoot. Large larval can substantially impact local dwarf mistletoe .
Ecological Role
and apparent control agent for dwarf mistletoe (Arceuthobium). Larval feeding kills mistletoe shoots, potentially reducing mistletoe spread and impact on conifer trees. Role in as for or not documented.
More Details
Larval color variation
are highly variable in color, matching the color of their mistletoe shoots. This appears to be dietary rather than genetic coloration, representing a form of phenotypic plasticity.
Ecological impact
Documented as capable of dramatically impacting dwarf mistletoe when are large, due to shoot-killing mining . This suggests potential as a agent, though no management applications are documented in available sources.