Taxon swap aaaaaa 48px Taxonomic Swap 59157 (Committed on 2019-11-19)

Derived from the sourced literature on The Reptile Database: Burbrink and Guiher (2014), Considering gene flow when using coalescent methods to delimit lineages of North American pitvipers of the genus Agkistrodon. Zoological Journal of the Linnean Society, 173: 505-526. doi:10.1111/zoj.12211 (

See related flags:

The Reptile Database (Citation) | Agkistrodon piscivorus swing-split
Added by bouteloua on June 27, 2019 22:10 | Committed by loarie on November 19, 2019
replaced with



Nooooo!! Reptile Database has fallen.

Posted by bennypoo over 1 year ago (Flag)

Both splits that were proposed by Guiher et al are not really usable in the real world. A. controtrix has been split into two species WITH large amounts of gene flow. This gene flow is shown in a figure in their paper to encompass a swath of between 50 and 200 miles from the coast of Texas, north into Kansas. So all of the snakes that fall into that hybrid zone are not definable to species. If this paper is going to be used then please make an A. contortrix "complex" taxon so that the hybrids can be placed into copperheads instead of being relegated to only generic level ID. The same goes for A. piscivorus in the south east with an even wider area of "hybridization" between the two species.

Posted by toby over 1 year ago (Flag)

see existing discussion at

Posted by bouteloua over 1 year ago (Flag)

Thanks bouteloua. I was wondering where all the hubbub might be happening. Best of luck with this one.

Posted by bennypoo over 1 year ago (Flag)

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