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Genus Tenebroides

Tenebroides  - Tenebroides laticollis - male Tenebroides crassicornis Difficult Beetle - Tenebroides americanus Bark-gnawing Beetle - Tenebroides mauritanicus Tenebroides corticalis Tenebroides sonorensis Tenebroides found under bark of dead Quercus stellata - Tenebroides americanus bark-gnawing beetle - Tenebroides corticalis
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 Cleroidea (Bark-gnawing, Checkered and Soft-winged Flower Beetles)
Family Trogossitidae (Bark-gnawing Beetles)
Subfamily Trogossitinae
Tribe Trogossitini
Genus Tenebroides
Explanation of Names
Tenebroides Piller & Mitterpacher 1783
~20 spp. (incl. one adventive) in our area(1), ~150 total(2)
3.2-12.3 mm(3)
Although some spp. are distinctive (e.g., T. collaris, T. obtusus), many are difficult to identify, esp. from photographs. To maximize the likelihood of a species-level identification, include (1) a clear dorsal shot showing the body outline and especially that of the pronotum; (2) a detail shot of the pronotum clearly showing the anterior and basal angles and the basal marginal bead; and (3) a detail shot of the antennal club showing the sensory areas. --M.C. Thomas's comment
cosmopolitan (all but a handful in the New World, mostly Neotropical), incl. most of NA(3)(2)(1)
most spp. under bark; T. mauritanicus in stored grain
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.Coleoptera, Beetles; Morphology and Systematics vol. 2
Richard A.B. Leschen, Rolf G. Beutel and John F. Lawrence. 2010. De Gruyter.
3.A revision of the Trogossitidae of America north of Mexico (Coleoptera: Cleroidea)
J.R. Barron. 1971. Memoirs of the Entomological Society of Canada, 75: 1-143.