Texas Beetle Information

Return to Texas Entomology - Compiled by Mike Quinn

13-spotted Weevil

Rhodobaenus tredecimpunctatus (Illiger 1794)

Family Curculionidae, Subfamily Dryophthorinae, Tribe Rhynchophorini


Rhodobaenustredecimpunctatus (Illiger 1794)

(on Silver-leaf Sunflower - Helianthus argophyllus)

So. Austin, Travis Co., Texas
July 19, 2008 (M. Quinn)

Range: California to Indiana to New York to Florida, northern Mexico

Flight Period: May to August in North Carolina (Brimley, 1938)

Host: Various Asteraceae 

Biology: Larvae feed in stems, adult emerges in the summer.

Brandhorst (1943) reported a pupa discovered in the root of Common Sunflower (Helianthus annuus) in western Kansas on Aug 2. The entrance hole into the stem was about 30 inches above ground. The adult emerged on Aug 5.

Similar Species: Three species north of Mexico:

Rhodobaenus pustulosus - Arizona
Rhodobaenus quinquepunctatus
- eastern North America to Texas
Rhodobaenus tredecimpunctatus
- wide-spread

Etymology: Rhodobaenus tredecimpunctatus (Illiger)

rhod, -o, =um (G). A rose
baen, -o (G). Walk, step
tri (L). Three
decim (L). Ten
punctat (L). Marked with pricks or punctures

Biography: Johann Karl Wilhelm Illiger (1775 - 1813) - Wikipedia


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.

Brandhorst, C.T. 1943. A Study of the Relationship Existing Between Certain Insects and Some Native Western Kansas Forbs and Weedy Plants. Transactions of the Kansas Academy of Science. 46: 164-175.

Brimley, C.S. 1938. The Insects of North Carolina: Being a List of the Insects of North Carolina and Their Close Relatives. North Carolina Department of Agriculture, Raleigh. 560 pp.

Vaurie, P. 1981. Revision of Rhodobaenus. Part 2, Species in North America (Canada to Panama) (Coleoptera, Curculionidae, Rhynchophorinae). Bulletin of the American Museum of Natural History 171(2): 117-198..

22 Jul 2008   Mike Quinn / mike.quinn@tpwd.state.tx.us / Texas Entomology / Texas Beetle Information