Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

See Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Subfamily Dorcatominae

Caenocara sp. , Puffball Beetle - Caenocara Tiny white larvae from old shelf fungi jolly fat guy - Caenocara bicolor Beetle - Byrrhodes tristriatus Calymmadderus sp.? - Calymmaderus Loomis2 J10 - Caenocara Caenocara bicolor - male beetle - Caenocara
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
Superfamily Bostrichoidea
Family Ptinidae (Death-watch and Spider Beetles)
Subfamily Dorcatominae
Synonyms and other taxonomic changes
Mesocoelopodinae (Tricoryninae) is usually treated as a distinct subfamily, but evidence for that arrangement is rather weak
Explanation of Names
Dorcatominae C.G. Thomson 1859
5 tribes, with 11 genera in our area and 45 genera total; the most species-rich subfamily in NA
contains many small species; maximum size is ~4 mm
Body short, often +/- ball-like, or moderately elongate, rarely cylindrical (genus Petalium only). Antennae usually with three terminal segments enlarged and triangular, rarely rather parallel-sided, or branched. In two genera, the antennae are serrate, with the terminal segments unmodified (Mesocoelopus, Neosothes).

Antennae usually completely hidden in retraction, rarely last segments partly visible (genus Calymmaderus).
Legs retracted in grooves of the ventral surface, like in pill beetles (Byrrhidae).
the group contains, besides wood-borers, many fungivores and species breeding in dry, non-woody plants