Texas Beetle Information

Return to Texas Entomology - Compiled by Mike Quinn

Half-famous Leaf Beetle

Megalostomis dimidiata Lacordaire, 1848

Family Chrysomelidae, Subfamily Cryptocephalinae, Tribe Clytrini


Megalostomis dimidiata Lacordaire, 1848

Lake Corpus Christi, San Patricio County, Texas
November 10, 2006 (P Crispin)

Range: Texas, south to Central America


Adults are evidentially specific to with Mimosaceae (Fabaceae).
The larval stage is associated with ants in the genus Atta.

Similar Species

Many species range from northern Mexico to South America. 
Three species, all in the subgenus Pygidiocarina, reach into the southwestern U.S.

Megalostomis dimidiata dimidiata Lacordaire - TX / Mex., C. Amer.
Megalostomis pyropyga pyropyga Lacordaire - AZ, NM / Mex.
Megalostomis subfasciata (J. L. LeConte) - AZ, KS, NM / Mex.


clyt, -o (G). Famous

meg, -a, -alo (G). Large great
stom, =a, -ato, -o (G). A mouth

dimidi (L). Half; to halve


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. 861 pp.

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

Clark, S.M., D.G. LeDoux, T.N. Seeno, E.G. Riley, A.J. Gilbert & J.M. Sullivan. 2004. Host plants of leaf beetle species occurring in the United States and Canada (Coleoptera: Megalopodidae, Orsodacnidae, Chrysomelidae exclusive of Bruchinae). Coleopterists Society, Special Publication no. 2, 476 pp.

Moldenke, A.R. 1970. A Revision of the Clytrinae of North America North of the Isthmus of Panama (Coleoptera: Chrysomelidae). Stanford University, Stanford. 310 pp. 

Riley, E.G., S.M. Clark, & T.N. Seeno. 2003. Catalog of the leaf beetles of America north of Mexico (Coleoptera: Megalopodidae, Orsodacnidae and Chrysomelidae, excluding Bruchinae). Coleopterists Society, Special Publication no. 1, 290 pp.

20 Jan 2007   Mike Quinn / mike.quinn@tpwd.state.tx.us / Texas Entomology / Texas Beetle Information