Texas Beetle Information

Return to Texas Entomology - Compiled by Mike Quinn

Harlequin Flower Beetle 

Gymnetis caseyi Antoine, 2001

Family Scarabaeidae, Subfamily Cetoniinae, Tribe Cetoniini


Gymnetis caseyi Antoine, 2001

Gymnetis caseyi Antoine, 2001
Gymnetis caseyi Antoine, 2001
Gymnetis caseyi Antoine, 2001

Edinburg, Hidalgo Co., TX 
March 19, 2005 (Cat Traylor)

Texas County Range Map for Gymnetis caseyi

Gymnetis caseyi Antoine, 2001

County Record Data from E.G. Riley, Dec. 2005

Range: Gymnetis caseyi occurs in Texas, Louisiana, Tamaulipas & San Luis Potosí.

Flight Period:  

In 2005, there were 77 G. caseyi specimens in Texas A&M collection collected between March and December, most from May to September.

Month Feb March April May June July Aug. Sept. Oct. Nov. Dec.
Texas 1 2 0 14 19 19 6 8 3 0 1
Mexico* 4 1

*The limited number of Mexico records may reflect limited collecting there.


Little is known about the habits of the larvae. Ritcher (1966) reported three third-stage larvae collected December 31, 1919, at Blue Mott, Victoria Co., TX in rotten moss in a hollow anacua (Ehretia anacua) tree.

Similar Species: Ratcliffe determined 18 spp. within Gymnetis, but only G. caseyi reaches the U.S.

Gymnetina cretacea (LeConte) is frequently incorrectly listed on various websites as Gymnetis cretacea.
G. cretacea occurs in Arizona and New Mexico. This species is similarly patterned, but black and white vs. yellow.
There may be a second, similar species of Gymnetina occurring in AZ-NM.


Synonyms per Riley & Wolfe, 2003
    Gymnetis flavomarginata
    Gymnetis sallei

G. sallei and G. flavomarginatea correctly apply to species that occur from southern Mexico south into South America

Etymology: Gymnetis caseyi Antoine, 2001

gymn, -o (G). Naked, bare
-ett, =a, =um, =us (NL). Small
caseyi - patronym for Thomas Casey (1857-1925) - UN, Lincoln State Museum - Division of Entomology


Antoine, P. 2001. Contribution a la connaissance des Gymnetini (Coleoptera, Cetoniidae). Coléoptères 7: 113-136.

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. v + 134 pp.

Casey, T. L. 1915. A review of the American species of Rutelinae, Dynastinae, and Cetoniinae. Memoires of the Coleoptera 6: 1-394.

Mico, E., W.E. Hall, & B.C. Ratcliffe. 2001. Descriptions of the larvae of Hoplopyga singularis (Gory and Percheron) and Hologymnetis cinerea (Gory and Percheron) with a revised key to the larvae of New World Gymnetini (Coleoptera: Scarabaeidae: Cetoniinae). Coleopterists' Bulletin 55: 205-217.

Morón, M.A. & R. Arce. 2002. Descriptions of the immature stages of five Mexican species of Gymnetini (Coleoptera: Scarabaeidae: Cetoniinae). Proceedings of the Entomological Society of Washington 104(4):1036-1054.

Ratcliffe, B.C. Monography and Phylogeny of New World Gymnetini (Cetoniinae). University of Nebraska

Riley, E.G. & C.S. Wolfe. 2003. An annotated checklist of the Scarabaeoidea of Texas. Southwestern Entomologist, Supplement, no. 26. 37 pp.

Ritcher, P.O. 1966. White Grubs and Their Allies, a Study of North American Scarabaeoid Larvae. Oregon State University Monograph Series No. 4: 1-219.

White, R.E. 1983. A Field Guide to the Beetles of North America. Houghton Mifflin Company, Boston. 405 pp.

09 Dec 2008  © Mike Quinn / Texas Entomology / Texas Beetles / Texas Beetle Photos /