Texas Beetle Information

Return to Texas Entomology - Compiled by Mike Quinn

Long-jawed Longhorn Beetle

Trachyderes (Dendrobias) mandibularis Dupont 1834

Family Cerambycidae, Subfamily Cerambycinae, Tribe Trachyderini

Unit Tray of Trachyderes mandibularis

Trachyderes m. mandibularis

(Female, males have much expanded jaws)

Roy Kizer Golf Course, Austin, Travis Co., TX
July 05, 2006 (Scott Young)

Texas County Records for Dendrobias mandibularis

Trachyderes m. mandibularis


County Records per Ed Riley, 2006
Plus Starr Co.


Range: southwestern U.S., south to Honduras, southern Florida

Flight Period: March-November, most common from July through September based on specimens in the TAMUIC.


Celtis sp. - Hackberry

Ficus sp. - Ficus

Tamarix gallica - French tamarisk

Biology: Adults are active during the day and most are found near wounded trees that are oozing sap.


Similar Species: There are three described subspecies of Dendrobias mandibularis, all occur in the United States.


Unit Tray of Trachyderes mandibularis - Texas A&M University Insect Collection

Trachyderes (Dendrobias) mandibularis - Florida State Collection of Arthropods


trachyte (G). Roughness
dero (G). The neck


Arnett, R.H., Jr., M.C. Thomas, P. E. Skelley & J.H. Frank. (editors). 2002. American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press LLC, Boca Raton, FL. xiv + 861 pp.

Borror, D.J. 1960. Dictionary of Word Roots and Combining Forms. National Press Books, Palo Alto. v + 134 pp.

Burke, H.R., J.A. Jackman, & M. Rose. 1994. Insects Associated with Woody Ornamental Plants. EEE - 00019. Texas A&M University, College Station. pp 1-166.

Goldsmith, S.K. 1985. Male Dimorphism in Dendrobias mandibularis Audinet-Serville (Coleoptera: Cerambycidae). Journal of the Kansas Entomological Society 58:534-538.

Goldsmith, S.K. 1987. The Mating System and Alternative Reproductive Behaviors of Dendrobias mandibularis (Coleoptera: Cerambycidae). Behavioral Ecology and Sociobiology 20:111-115.

Goldsmith, S.K. and J. Alcock. 1993. The mating chances of small males of the cerambycid beetle Trachyderes mandibularis differ in different environments (Coleoptera: Cerambycidae). Journal of Insect Behavior 6(3): 351-360. (Abstract)

Hovore, F.T., R.L. Penrose & R.W. Neck. 1987. The Cerambycidae, or longhorned beetles, of southern Texas: a faunal survey (Coleoptera). Proceedings of the California Academy of Sciences, 44(13): 283-334, 20 figs.

Hudepohl, K.E. 1985. Revision der Trachyderini (Coleoptera: Cerambycidae, Cerambycinae). Entomol. Arb. Mus. George Frey, 33/34:1-167.

LeConte, J.L. 1858. Descriptions of new species of Coleoptera, chiefly collected by the United States and Mexican boundary commission, under Major W.H. Emory, U.S.A. Proceedings Academy of Natural Sciences of Philadelphia 10: 59-89.

White, R.E. 1983. A Field Guide to the Beetles of North America. Houghton Mifflin Company, Boston. 368 pp.

01 Nov 2009   Mike Quinn / entomike@gmail.com / Texas Entomology / Texas Beetle Information