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Species Phileurus truncatus - Triceratops Beetle

Triceratops Beetle - Phileurus truncatus Beetles & Pupae - Phileurus truncatus Phileurus truncatus Triceratops Beetle  - Phileurus truncatus - male Phileurus truncatus Triceratops beetle - Phileurus truncatus Triceratops Beetle - Phileurus truncatus Phileurus - Phileurus truncatus
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)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Dynastinae (Rhinoceros Beetles)
Tribe Phileurini
Genus Phileurus
Species truncatus (Triceratops Beetle)
Other Common Names
Loving Scarab, double-horned rhino beetle
Synonyms and other taxonomic changes
Phileurus truncatus (Palisot de Beauvois)
Orig. Comb: Scarabaeus truncatus Palisot de Beauvois, 1806
Explanation of Names
truncatus - probably refers to the rather short horns. (Plausible speculation.)
2 spp. n. of Mex. (1)
32-38 mm (large!)
Black, distinctly flattened, both sexes with three prominent horns on head. Elytra deeply striated. Resembles Xyloryctes jamaciensies, but has three, not one, horn. P. valgus is similar, but smaller, and has very short horns.
Both genders have horns. This is unusual among horned scarabs.
se US to AZ (AZ-FL-VA-OK) to S. Amer.
Woodlands. Adults have been reported causing cabin fires by coming down chimneys, presumably attracted to fireplace smoke and spreading embers.
April-September (South Carolina), reported July-September (North Carolina)
Adults of this genus will take fruit and meat in captivity. One sources says adults eat other insects.
Life Cycle
Adults come to lights. Larvae feed in rotten logs, reported, in particular, from dead oaks. Presumably, males (?) use horns to defend breeding sites. Lifespan of adults is reported to be quite long (up to two years) in captivity. Reported to have structures for sound production (stridulation) (2). Stridulate softly when handled (P. Coin, Durham, NC 11 July 2007).
Larvae and adults are also "carnivorous" and will - if not preferentially - feed on grubs & pupae of other scarabs (incl. D. tityus)
not illustrated in most North American guides on beetles.
See Also
Phileurus valgus-smaller, with horns reduced to bumps
Rhinoceros Beetle, Xyloryctes jamaicensis
Ox Beetles, Strategus
Print References
Brimley, p. 207--occurrence in North Carolina (3)
Deyrup, p. 96, has photo of this species but does not name it--states they live in rotten logs (4)
Harpootlian, p. 115, fig. 229 (5)
Taber, p. 147, discusses life history briefly, photo, fig. 127. (2) (Original citation is Glaser, Coleopterist's Bulletin, 1976; 30: 133-8.)
Internet References
Beetles of Florida--checklist
Rhino Beetles page says adults of both sexes identical.
Elytra and Antenna--says adults eat other insects.
Beetles of Oklahoma--museum holdings for that state
Works Cited
1.Checklist and Nomenclatural Authority File of the Scarabaeoidea of the Nearctic Realm. Version 4.
Andrew B. T. Smith. 2009. Electronically published, Ottawa, Canada. 97 pp.
2.Insects of the Texas Lost Pines (W.L. Moody, Jr., Natural History Series, No. 33)
Stephen W. Taber, Scott B. Fleenor. 2003. M University Press.
3.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.
4.Florida's Fabulous Insects
Mark Deyrup, Brian Kenney, Thomas C. Emmel. 2000. World Publications.
5.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.