Lamellate-antennae
Guides
Pelidnota
Precious Metal Scarabs
Pelidnota is a genus of scarab beetles in the family Scarabaeidae, containing over 180 described species. Members are commonly known as Precious Metal Scarabs. The genus is restricted to the Neotropics. Beetles in this genus are generally robust and often exhibit metallic coloration.
Pleocoma
rain beetles
Pleocoma is the sole extant genus of Pleocomidae, a family endemic to the Pacific states of North America. These beetles are notable for their extreme subterranean lifestyle, with adults emerging only during fall and winter rains to mate. The genus name derives from Greek words for 'abundant hair,' referring to the dense ventral hair covering. Adults are non-feeding, while larvae are root-feeders with exceptionally long development periods of up to 13 years.
Scarabaeoidearain-beetlessubterraneannon-feeding-adultslong-lived-larvaepheromone-mediated-matingendemicNearcticrelictual-distributionCretaceous-originpest-of-Christmas-treeslamellate-antennaeflightless-femalesrain-triggered-emergenceCalifornia-faunaOregon-faunaWashington-faunaroot-feeding-larvaeextreme-seasonalitylight-attracted-malesPolyphylla avittata
spotted Warner valley dunes June beetle, spotted Warner valley dunes scarab beetle
Polyphylla avittata is a species of scarab beetle in the subfamily Melolonthinae, commonly known as the spotted Warner valley dunes June beetle. The species is endemic to sand dune habitats in the Warner Valley of Utah. Like other members of the genus Polyphylla, it exhibits sexual dimorphism in antennal structure, with males possessing enlarged, lamellate antennae used to detect female sex pheromones. The species is rarely encountered and poorly documented in scientific literature.
Polyphylla uteana
Coral Pink Sand Dunes June Beetle
Polyphylla uteana is a large scarab beetle endemic to the Coral Pink Sand Dunes in southwestern Utah. Males possess exceptionally developed lamellate antennae with seven highly elongate plates that fan open to detect female pheromones. The species is nocturnal and attracted to ultraviolet light. Like other Polyphylla species, females are likely flightless and rarely encountered.
Scarabaeoidea
Scarabs, Stag Beetles, Dung Beetles, Fruit and Flower Chafers
Scarabaeoidea is a superfamily of beetles comprising approximately 35,000 described species, with around 200 new species described annually. It is the sole superfamily within the infraorder Scarabaeiformia. The group includes diverse families such as Scarabaeidae (scarabs, dung beetles, chafers), Lucanidae (stag beetles), Geotrupidae (earth-boring scarabs), and Bolboceratidae. Many species exhibit distinctive circularly polarized light reflection from their cuticles, produced by helicoidal stacks of chitin microfibrils. The superfamily is currently undergoing taxonomic revision at the family level.