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


Family Passandridae - Parasitic Flat Bark Beetles

Catogenus rufus TX Parasitic Flat Bark Beetles? - Catogenus rufus Passandridae, Parasitic Flat Bark Beetle, dorsal - Catogenus rufus Taphroscelidia? - Taphroscelidia linearis Parasitic Flat Bark Beetle - Catogenus rufus Porchlight visitor - Catogenus rufus Flat Bark Beetle Predation - Catogenus rufus Catogenus sp. - Catogenus rufus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Cucujoidea
No Taxon (Cucujid series)
Family Passandridae (Parasitic Flat Bark Beetles)
Synonyms and other taxonomic changes
Formerly treated as part of Cucujidae
Explanation of Names
Passandridae Erichson 1845
3 spp. in 2 genera in our area(1), 36 spp. in 5 genera in the New World, >100 spp. in 9 genera worldwide(2)
diagnostic characters(3):
tarsi 5-5-5 in both sexes
head and prothorax with system of lines and grooves (also in Laemophloeidae)
elytra with system of cells or vestiges of cells
mesocoxal cavities closed laterally by sterna
hind wing veins well-developed
genae produced anteriorly as rounded plates, concealing maxillae
gular sutures confluent (confluent = running into one another; gula is part of the "neck", the collum)
adeagus inverted with articulated parameres
much of the world, esp. in warmer climes; in our area, e. NA & so. US(1)(2)
larvae are ectoparasites of wood-inhabiting insects, esp. Cerambycidae; adult feeding habits unknown(1)
Print References
Thomas, M.C. 2002. Passandridae, Pp. 327-328. In: Arnett, R.H., Jr., M.C. Thomas, P.E. Skelley, and J.H. Frank, eds. American beetles. Volume 2. Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press, New York.
Works Cited
1.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
2.Thomas M.C. (-2011) A preliminary checklist of the flat bark beetles of the world
3.The flat bark beetles of Florida (Coleoptera: Silvanidae, Passandridae, Laemophloeidae)
Thomas M.C. 1993. Arthropods of Florida and Neighboring Land Areas 15: viii+93 pp.