Hemileuca slosseri

Peigler & Stone, 1989

Slosser's buckmoth, nit-grass moth

Hemileuca slosseri is a of buck moth in the Saturniidae, described in 1989 by Richard S. Peigler and Stephen E. Stone. It is found in North America, particularly in the southwestern United States including New Mexico and adjacent Oklahoma. The species is associated with oak , with larvae feeding on Havard shin-oak (Quercus havardii). Like other Hemileuca species, it is and possesses urticating (stinging) spines as larvae.

Pronunciation

How to pronounce Hemileuca slosseri: /ˌhɛmɪˈluːkə ˈslɒsəri/

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Identification

Hemileuca slosseri can be distinguished from other Hemileuca by geographic distribution and larval association. It occurs in the southwestern Great Plains and Chihuahuan Desert region, overlapping with H. grotei but specifically associated with Quercus havardii rather than other oak species. may be confused with other day-flying Hemileuca species; precise identification requires examination of genitalic structures or larval host confirmation. The species was described relatively recently (1989) and may be undercollected due to its remote .

Appearance

are medium-sized saturniid with the characteristic reduced mouthparts typical of the . As with other Hemileuca , adults likely exhibit cryptic or aposematic coloration, though specific details of wing pattern and coloration are not well documented in available sources. Larvae possess dense urticating spines that can deliver painful stings upon contact with skin.

Habitat

Associated with sand dune and sandhill shrubland dominated by Havard shin-oak (Quercus havardii). These habitats occur in the southwestern Great Plains and eastern Chihuahuan Desert, characterized by sandy soils, sparse vegetation, and pinyon-oak-juniper woodland transitions.

Distribution

North America: documented from New Mexico (primary range) and adjacent Oklahoma (northwestern corner, near Colorado border). The type locality and precise range boundaries are not fully documented, but observations cluster in eastern New Mexico and the Oklahoma Panhandle region.

Seasonality

are active during summer months. Based on related Hemileuca and collection records, likely June through August, with exact timing dependent on seasonal conditions and elevation.

Diet

Larvae feed exclusively on Havard shin-oak (Quercus havardii). have mouthparts and do not feed, surviving on fat reserves accumulated during larval development.

Host Associations

Quercus havardii - larval food plantHavard shin-oak; primary and apparently exclusive

Life Cycle

Complete with four stages: , larva, pupa, and . Eggs are laid on plant branches. Larvae feed gregariously or solitarily on oak foliage, possessing urticating spines for defense. occurs in a silken cocoon, likely attached to host plant branches or in ground litter. Adults are , short-lived, and do not feed.

Behavior

are day-flying, a characteristic of the Hemileuca. Males likely use their bipectinate (feathery) to detect female . Larvae are active feeders on oak foliage and should not be handled due to their urticating spines, which can cause painful stings, localized swelling, and in some cases reactions.

Ecological Role

As a herbivore on Quercus havardii, larvae contribute to nutrient cycling and energy flow in sand dune shrubland . The serves as prey for various vertebrate and . may function as to a limited degree during their brief period, though this is likely minimal given their non-feeding status.

Human Relevance

Larvae pose a stinging hazard to humans who contact them; the urticating spines can cause significant pain and medical complications in sensitive individuals. The has no economic importance to agriculture or forestry. Of interest to lepidopterists and naturalists studying southwestern North American saturniid diversity.

Similar Taxa

Hemileuca groteiOverlaps in distribution and ; distinguished by larval preferences (H. grotei on other Quercus ) and subtle morphological differences in
Hemileuca oliviaeOccurs in similar grassland/shrubland in the region; distinguished by plant associations and geographic range

More Details

Conservation considerations

Like other Hemileuca , H. slosseri may be vulnerable to management practices such as prescribed burning, which can cause direct mortality to immobile life stages (, larvae, pupae) and eliminate plants. The reliance on a single host species (Quercus havardii) makes it potentially susceptible to habitat fragmentation and climate-driven changes in sand dune shrubland .

Taxonomic history

Described as a new in 1989, making it one of the more recently recognized North American saturniids. The specific epithet honors an individual (Slosser), presumably for contributions to entomology or natural history of the region.