Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Family Passandridae - Parasitic Flat Bark Beetles

Parasitic Flat Bark Beetle - Catogenus rufus Parasitic Flat Bark Beetle - Catogenus rufus Trogossitine? - Catogenus rufus Catogenus rufus Catogenus rufus Bark Beetle? - Catogenus rufus Taphroscelidia linearis from Rockwall, Texas - Taphroscelidia linearis Long-horned beetle - Catogenus rufus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Cucujoidea (Sap, Bark and Fungus Beetles)
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.