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For Insects, Spiders & Their Kin
For the United States & Canada
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Genus Tricorynus

another anobiid lineup - Tricorynus Scolytidae? - Tricorynus Anobiid - Tricorynus similis Unknown Beetle - Tricorynus Beetle on walnut twigs - Tricorynus Ptinid sifted from oak leaf litter - Tricorynus Belden-J.2021.17 - Tricorynus ptinid - Tricorynus
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 Mesocoelopodinae
Tribe Tricorynini
Genus Tricorynus
Synonyms and other taxonomic changes
Catorama Guérin-Méneville 1850, Hemiptychus LeConte 1865, Cathorama Gemminger & Harold 1869, Xylotheca Reitter 1897
Explanation of Names
Tricorynus Waterhouse 1849
name alludes to the 3-segmented antennal club
84 spp. in our area(1), >30 more described spp. in the neotropics
1.5‒6 mm
Mesosternum between mesocoxae produced into a hump or hook (diagnostic); antennae 10-segmented; pubescence of the body fine and recumbent; prothoracic tibiae almost always striate.
for species identification, see(2); add'l sp. described in(3)
key to WI spp. in(1)
Species tend to be variable, and very hard to key out using existing literature. Further work is needed to resolve species limits.
New World; many neotropical spp., mostly undescribed; a few spp. have been spread by commerce over (sub)tropical regions of the world, at least one naturalized in so. Africa
Diverse: apparently mostly plant seeds, also galls, dead stems/twigs, fungi, and stored products (e.g. T. herbarius)(1)
Works Cited
1.Death-watch and spider beetles of Wisconsin—Coleoptera: Ptinidae
Arango, R.A. and D.K. Young. 2012. General Technical Report FPL-GTR-209. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.
2.A revision of the genus Tricorynus of North America (Coleoptera: Anobiidae)
White R.E. 1965. Misc. publ. Ent. Soc. Am. 4: 283-368.
3.Three new species of Anobiidae from southwestern United States and northwestern Mexico (Coleoptera)
White R.E. 1981. Proc. Ent. Soc. Wash. 83: 472-278.