Sedomaya glamisensis

Glamis Night Tiphiid

Family: Tiphiidae · Class: Insecta · Order: Hymenoptera

Conservation status: G1 S1

The Glamis Night Tiphiid is a parasitoid wasp in the family Tiphiidae, subfamily Brachycistidinae. This species is part of a specialized group of wasps that are active during nighttime hours, distinguishing them from most other tiphiid species which are diurnal. Physical characteristics of this species have not been well documented in the scientific literature, though tiphiid wasps generally possess robust bodies and strong mandibles adapted for their parasitoid lifestyle. Sedomaya glamisensis is endemic to California, with its distribution apparently restricted to a very limited geographic area based on its critically imperiled conservation ranking. The species name suggests an association with the Glamis region of Imperial County in southeastern California, though specific distributional data remains sparse in available records. Habitat requirements for this species have not been comprehensively documented. Most nocturnal tiphiids are associated with desert or semi-arid environments where they hunt for their scarab beetle hosts during cooler nighttime temperatures. Given the Glamis association, this species likely inhabits desert scrub or sandy desert habitats typical of the Imperial Valley region. Like other tiphiid wasps, females of this species are presumed to be parasitoids of scarab beetle larvae, particularly those in the subfamily Melolonthinae or related groups. The behavioral ecology of nocturnal tiphiids involves females searching for beetle larvae in soil, using their antennae and other sensory structures to locate hosts. Once a suitable host is found, the female stings and paralyzes the larva, then deposits a single egg on the host. The developing wasp larva feeds externally on the paralyzed beetle larva, eventually killing it. Males are typically smaller and may be found at flowers or engaging in mate-seeking behavior. The nocturnal activity pattern of this group represents an adaptation that may reduce competition with diurnal parasitoids and avoid extreme daytime temperatures in desert environments. The conservation status of Sedomaya glamisensis reflects critical concern for its long-term survival. The Global Heritage Rank of G1 and State Rank of S1 indicate this species is critically imperiled both globally and within California, with five or fewer occurrences or very few remaining individuals. The extremely restricted ranking suggests the species faces a high risk of extinction. Specific threats to this species have not been documented, but likely include habitat loss due to agricultural conversion, urban development, off-road vehicle activity, and renewable energy development in desert regions of Imperial County. Climate change may pose additional challenges through altered precipitation patterns and increased temperature extremes in already marginal desert habitats. Detailed ecological studies of this species are lacking, and much of the basic biology remains unknown. The conservation of this critically imperiled species would benefit from targeted surveys to determine current distribution, population size, host associations, and specific habitat requirements. This species is included on the California Department of Fish and Wildlife's Special Animals List.

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