Stamnoctenis pearsalli

Family: Geometridae · Class: Insecta · Order: Lepidoptera

Stamnoctenis pearsalli is a geometrid moth in the subfamily Larentiinae, tribe Stamnodini. This species belongs to a genus of moths within the family Geometridae, commonly known as geometer moths or inchworm moths. Specific morphological details for S. pearsalli have not been well documented in the available literature, though members of the genus Stamnoctenis are typically small to medium-sized moths with wingspan measurements that vary by species. The geographic distribution of Stamnoctenis pearsalli appears to be limited, though comprehensive range data is not readily available in current taxonomic databases. The species is recognized by the U.S. Fish and Wildlife Service in their taxonomic system, suggesting it occurs within United States territory. However, specific state or regional occurrence records require further documentation. The extent of the species' historical versus current range remains unclear due to limited survey data. Habitat preferences for S. pearsalli have not been extensively studied or documented. Based on observations from BugGuide, the species has been recorded in mixed woodland environments and residential areas with proximity to ocean frontage, suggesting some tolerance for coastal habitats (BugGuide 2021). The species appears to be attracted to artificial lights, particularly fluorescent UV lights, which is consistent with nocturnal activity patterns typical of many Geometridae species. Additional habitat requirements and microhabitat preferences remain undocumented. Ecological information for Stamnoctenis pearsalli is extremely limited. Like other members of the Geometridae family, larvae are likely herbivorous and may be associated with specific host plants, though no confirmed host plant relationships have been documented for this species. Related species within the genus Stamnoctenis have suggested associations with Juniperus species, but specific larval hosts for S. pearsalli require verification (BugGuide). Adult flight periods, reproductive behavior, and seasonal activity patterns have not been characterized in the scientific literature. Stamnoctenis pearsalli does not appear on federal or state endangered species lists as of December 2025. The species lacks formal conservation status designations, which may reflect either stable populations or insufficient data to assess conservation needs. No specific population estimates, trend data, or identified threats are available in current databases. The limited ecological information available for this species represents a significant knowledge gap that impedes conservation assessment. Scientific documentation for this species remains extremely limited despite its recognition in federal taxonomic systems. The information presented here synthesizes available sources including U.S. Fish and Wildlife Service taxonomic records and community observations from BugGuide. Detailed studies of this species' biology, distribution, ecology, and conservation status are needed. We welcome contributions of verified scientific data, photographs, or field observations to enhance this species account.

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, and more.