Platyceroides californicus

Distinguished from the similar genus Platycerus by the structure of the antennal club: Platyceroides has shorter, more compact lamellae. Male genitalia provide definitive separation from congeners and Platycerus. Within California, it may be confused with other small dark lucanids; examination of antennae and genitalia is required for certain identification. The species name indicates California endemism, which helps narrow geographic possibilities.

Small to medium stag beetle with a somewhat flattened, elongate body. Males possess mandibles that are reduced relative to many other Lucanidae, not dramatically enlarged. Antennae with a distinct club; the lamellae of the antennal club are relatively short. Coloration generally dark, likely brown to black. Elytra may show subtle surface sculpturing. Sexual dimorphism in mandible development is less pronounced than in many stag beetles.

Endemic to California, United States. Specific habitat preferences within the state are not well documented due to limited collection records.

• PlatycerusClosely related genus with similar overall appearance; distinguished by longer antennal lamellae and different male genitalia structure.
• Other California LucanidaeSmall dark stag beetles in the same region require careful examination of antennae and genitalia for correct assignment to genus and species.

• endemic
• California
• Lucanidae
• stag beetle
• data deficient

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon