| Distribution | USA (S Iowa, SE Nebraska, E Kansas, Missouri, Louisiana, E Oklahoma, NE-Texas; isolated records from SW Wisconsin, SE Arkansas)
Map legend:
 - Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and this does not always work properly. We are working on it.
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| References |
- Bailey, Reeve M. 1939. Carphophis amoena vermis and Lampropeltis calligaster in Iowa. Copeia 1939 (4): 218-220 - get paper here
- Boundy, Jeff; Frank T. Burbrink, Jonathan A. Campbell, Brian I. Crother, Kevin de Queiroz, Darrel R. 2012. Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians, Seventh Edition. SSAR, 101 pp.
- Clark, Donald R., Jr. 1968. A proposal of specific status for the western worm snake, Carphophis amoenus vermis (Kennicott) Herpetologica 24 (2): 104-112 - get paper here
- Collins J T 1991. Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles Herpetological Review 22 (2): 42-43
- Collins, J.T. & Collins, S.L. 2009. A pocket guide to Kansas snakes, 2nd ed. Great Plains Nature Center, Wichita, 69 pp.
- Collins, J.T. & Collins, S.L. 2010. A pocket guide to Kansas snakes, 3rd ed. Great Plains Nature Center, Wichita, 69 pp.
- Collins, J.T. and <br />T. W. Taggart 2002. Standard Common and Current Scientific Names for North American Amphibians, Turtles, Reptiles, and Crocodilians, Fifth Edition. Center for North American Herpetology, 52 pp.
- Conant,R. & Collins,J.T. 1991. A Field Guide to Reptiles and Amphibians of Eastern/Central North America, 3rd ed. Houghton Mifflin (Boston/New York), xx + 450 p.
- Cope, E.D. 1893. On a collection of batrachia and reptilia from southwest Missouri. Proc. Acad. Nat. Sci. Philadelphia 1893: 383-385 - get paper here
- Craven, S.R. & Knudsen, G.J. 1996. Snakes of Wisconsin. University of Wisconsin.
- Dixon, James R. 2000. Amphibians and reptiles of Texas, second edition. Texas A&M University Press, 421 pp.
- Dundee, H.A., & Rossman, D.A. 1989. The amphibians and reptiles of Louisiana Louisiana St. Univ. Press, Baton Rouge 300 pp.
- Irwin, Kelly J. 2004. Arkansas Snake Guide. Arkansas Game & Fish Commission, Little Rock, 50 pp.
- Kennicott 1859. Notes on coluber calligaster of Say, and a description of a new species of Serpents in the collection of the north Western University of Evanston,Ill. Proc. Acad. Nat. Sci. Philadelphia 11: 98-100 - get paper here
- Rossman, D. A. 1973. Evidence for the conspecificity of Carphophis amoenus (Say) and Carphophis vermis (Kennicott). Journal of Herpetology 7 (2): 140-141 - get paper here
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