The Pyron Lab


Cat Hendry, João Tonini, and Sarah Rhodig

Also featuring snakehandlers: these signs shall follow them (a film by alex pyron)




(76) Pyron, R.A., Arteaga, A., Echevarria, L.Y., and O. Torres-Carvajal. 2016. A revision and key for the tribe Diaphorolepidini (Serpentes: Dipsadidae) and checklist for the genus Synophis. Zootaxa 4171(2):293-320. (PDF)


(75) Murphy, J.C., Jowers, M.J., Lehtinen, R.M., Charles, S., Colli, G.R., Peres Jr., A., Hendry, C.R., and R.A. Pyron. Cryptic, sympatric diversity in tegu lizards of the Tupinambis teguixin group (Squamata, Sauria, Teiidae) and the description of three new species. PLoS ONE 11(8): e0158542. (PDF)

(74) Tucker, D.B., Colli, G.R., Giugliano, L.G., Hedges, S.B., Hendry, C.R., Lemmon, E.M., Lemmon, A.R., Sites, J.W. Jr., and R.A. Pyron. 2016. Methodological congruence in phylogenomic analyses with morphological support for teiid lizards (Sauria: Teiidae). Molecular Phylogenetics and Evolution 103 (2016): 75-84. (PDF)


(73) Pyron, R.A., Hsieh, F.W., Lemmon, A.R., Lemmon, E.M., and C.R. Hendry. 2016. Integrating phylogenomic and morphological data to assess candidate species-delimitation models in Brown and Red-bellied snakes (Storeria). Zoological Journal of the Linnaean Society 177(4):937-949. (PDF)


(72) Pyron, R.A. Niche Evolution. In Oxford Bibliographies in Evolutionary Biology (J. B. Losos, ed.). Oxford University Press, Oxford, UK. DOI: 10.1093/OBO/9780199941728-0075. (PDF)

(71) Arteaga, A.F., Pyron, R.A., Peñafiel, N., Culebras, J., Bustamante, L., Yánez-Muñoz, M.H., and J.M. Guayasamin. 2016. Comparative phylogeography reveals cryptic diversity and repeated patterns of cladogenesis for amphibians and reptiles in northwestern Ecuador. PLoS ONE 11(4): e0151746. (PDF)


(70) Feldman, A., Pyron, R.A., Sabath, N., Mayrose, I., and S. Meiri. Body sizes and diversification rates of lizards, snakes, amphisbaenians and the tuatara. Global Ecology and Biogeography 25(2):187-197. (PDF)



(69) Burbrink, F.T., Pyron, R.A., McKelvy, A.D., and E.A. Myers. Predicting community structure in snakes on Eastern Nearctic islands using ecological neutral theory and phylogenetic methods. Proceedings of the Royal Society B, Biological Sciences 282(1819): 20151700. (PDF)


(68) Pyron, R.A., Guayasamin, J.M., Peñafiel, N., Bustamante, L., and A. Arteaga. Systematics of Nothopsini (Serpentes: Dipsadidae), with a new species of Synophis from the Pacific Andean slopes of southwestern Ecuador. Zookeys 541: 109-147. (PDF)

(67) Pyron, R.A., Costa, G.C., Patten, M.A., and F.T. Burbrink. 2015. Phylogenetic niche conservatism and the evolutionary basis of ecological speciation. Biological Reviews 90(4): 1248-1262. (PDF)


(66) Guayasamin, J.M., Rivera-Correa, M., Arteaga, A., Culebras, J., Bustamante, L., Pyron, R.A., Peñafiel, N., Morochz, C., and C.R. Hutter. 2015. Molecular phylogeny of stream treefrogs (Hylidae: Hyloscirtus bogotensis Group), with a new species from the Andes of Ecuador. Neotropical Biodiversity 1(1): 2–21. (PDF)


(65) Pyron, R.A. Advancing perspectives on parity-mode evolution. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 324(6): 562-563. (PDF)


(64) Pyron, R.A., and F.T. Burbrink. 2015. Contrasting models of parity-mode evolution in squamate reptiles. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 324(6): 467-472. (PDF)


(63) Pyron, R.A. Post-molecular systematics and the future of phylogenetics. Trends in Ecology and Evolution 30(7):384-389. (PDF)


(62) Fry, B.G, Sunagar, K., Casewell, N., Kochva, E., Scheib, H., Wuster, W., Vidal, N., Young, B., Burbrink, F.T., Pyron, R.A., Vonk, F.J., Roelants, K., and T.N.W. Jackson. 2015. The origin and evolution of the Toxicofera reptile venom system. Chapter 1 in Venomous Reptiles And Their Toxins: Evolution, Pathophysiology And Biodiscovery (B. G. Fry, ed.). Oxford University Press, Oxford. 576p.

(61) Betancur-R, R., Orti, G., and R.A. Pyron. 2015. Fossil-based comparative analyses reveal ancient marine ancestry erased by extinction in ray-finned fishes. Ecology Letters 18(5):441-450. (PDF)


(60) Longrich, N.R., Vinther, J., Pyron, R.A., Pisani, D., and J.A. Gauthier. Biogeography of worm lizards (Amphisbaenia) driven by end-Cretaceous mass extinction. Proceedings of the Royal Society B, Biological Sciences 282: 20143034. (PDF)


(59) Arcila, D.K., Pyron, R.A., Tyler, J.C., Orti, G., and R. Betancur-R. 2015. An evaluation of fossil tip-dating versus node-age calibrations in tetraodontiform fishes (Teleostei: Percomorphaceae). Molecular Phylogenetics and Evolution 82(A):131-145. (PDF)



(58) Ohler, A., Amarasinghe, A.A.T., Andreone, F., Bauer, A., Borkin, L., Channing, A., Chuankern, Y., Das, I., Deuti, K., Fretey, T., Matsui, M., Pyron, R.A., Rodel, M.O., Segniagbeto, G.H., Vasudevan, K., and A. Dubois. 2014. DICROGLOSSIDAE Dubois, 1987 (Amphibia, Anura): proposed conservation. Bulletin of Zoological Nomenclature 71(4): 244-249. (PDF)


(57) Guo, P., Zhu, F., Liu, Q., Zhang, L., Li, J. X., Huang, Y. Y., and R.A. Pyron. Cryptic diversity and taxonomic revision of the Asian keelback snakes, genus Amphiesma (Serpentes: Colubridae: Natricinae). Zootaxa 3873(4): 425-440. (PDF)


(56) Pyron, R.A., Hendry, C.R., Chou, V.M., Lemmon, E.M., Lemmon, A.R., and F.T. Burbrink.  Effectiveness of phylogenomic data and coalescent species-tree methods for resolving difficult nodes in the phylogeny of advanced snakes (Serpentes: Caenophidia). Molecular Phylogenetics and Evolution 81(1): 221-231. (PDF)


(55) Fenker, J., Tedeschi, L.G., Pyron, R.A., and C. Nogueira. 2014. Phylogenetic diversity, habitat loss and conservation priorities in South American pitvipers (Crotalinae: Bothrops and Bothrocophias). Diversity and Distributions 20(10): 1108-1119. (PDF)


(54) Pyron, R.A. 2014. Temperate extinction in squamate reptiles and the roots of latitudinal diversity gradients. Global Ecology and Biogeography 23(10): 1126-1134. (PDF)


(53) Pyron, R.A. 2014. Biogeographic analysis of amphibians reveals both ancient continental vicariance and recent oceanic dispersal. Systematic Biology 63(5): 779-797. (PDF) GenBank accessions (CSV)


(52) Pyron, R.A., Reynolds, R.G., and F.T. Burbrink. 2014. A taxonomic revision of boas (Serpentes, Boidae). Zootaxa 3846(2): 249-260. (PDF)


(51) Pyron, R.A., and V. Wallach. 2014. Systematics of the blindsnakes (Serpentes: Scolecophidia: Typhlopoidea) based on molecular and morphological evidence. Zootaxa 3829(1): 1-81. (PDF)


(50) Pyron, R.A., and F.T. Burbrink. 2014. Ecological and evolutionary determinants of species richness and phylogenetic diversity for island snakes. Global Ecology and Biogeography 23(8): 848-856. (PDF)


(49) Hendry, C.R., Guiher, T.J., and R.A. Pyron. Ecological differentiation and sexual selection drives sexual size-dimorphism in New World pitvipers (Crotalinae). Journal of Evolutionary Biology 27(4): 760-771. (PDF)


(48) Ruane, S., Bryson, R.W. Jr., Pyron, R.A., and F.T. Burbrink. 2014. Coalescent Species delimitation in Milksnakes (genus Lampropeltis) and impacts on phylogenetic comparative analyses. Systematic Biology 63(2): 231-250. (PDF)


(47) Cooper, W.E. Jr., Pyron, R.A., and T.J. Garland Jr. 2014. Island tameness: living on islands reduces flight initiation distance. Proceedings of the Royal Society B, Biological Sciences 281(1777):20133019. (PDF)


(46) Pyron, R.A., and F.T. Burbrink. Early origin of viviparity and multiple reversions to oviparity in squamate reptiles. Ecology Letters 17(1): 13-21. (PDF)



(45) Pyron, R.A., and F.T. Burbrink. 2013. Phylogenetic estimates of speciation and extinction rate for testing ecological and evolutionary hypotheses. Trends in Ecology and Evolution 28(12): 729-736. (PDF)


(44) Pyron, R.A., and J.J. Wiens. 2013. Large-scale phylogenetic analyses reveal the causes of high tropical amphibian diversity. Proceedings of the Royal Society of London B, Biological Sciences 280 (1770): 20131622. (PDF)


(43) Guo, P., Liu, Q., Zhang, L., Li, C., Pyron, R.A., Jiang, K., and F.T. Burbrink. 2013. Lycodon and Dinodon: one genus or two? Evidence from molecular phylogenetics and morphological comparisons. Molecular Phylogenetics and Evolution 68(1): 144-149. (PDF)


(42) Pyron, R.A., Burbrink, F.T., and J.J. Wiens. 2013. A phylogeny and updated classification of Squamata, including 4161 species of lizards and snakes. BMC Evolutionary Biology 13: 93. (PDF)


(41) Abraham, R.K., Pyron, R.A., Zachariah, A., Ansil, B.R., and A. Zachariah. 2013. Two new genera and one new species of treefrog (Anura: Rhacophoridae) highlight cryptic diversity in the Western Ghats of India. Zootaxa 3640(2): 177-189. (PDF)


(40) Garda, A.A., Wiederhecker, H.C., Gainsbury, A.M., Costa, G.C., Pyron, R.A., Vieira, G.H.C., Werneck, F.P., and G.R. Colli. 2013. Microhabitat Variation Explains Local-scale Distribution of Terrestrial Amazonian Lizards in Rondônia, Western Brazil. Biotropica 45(2): 245-252. (PDF)


(39) Pyron, R.A., Kandambi, H.K.D., Hendry, C.R., Pushpamal, V., Burbrink, F.T., and R. Somaweera. 2013. Genus-level molecular phylogeny of snakes reveals the origins of species richness in Sri Lanka. Molecular Phylogenetics and Evolution 66(2013): 969-978. (PDF)


(38) Chen, X., Huang, S., Guo, P., Colli, G.R., Montes de Oca, A.N., Vitt, L.J., Pyron, R.A., and F.T. Burbrink. 2013. Understanding the formation of ancient intertropical disjunct distributions using Asian and Neotropical hinged-teeth snakes (Sibynophis and Scaphiodontophis: Serpentes: Colubridae). Molecular Phylogenetics and Evolution 66 (1): 254-261. (PDF)



(37) Evans, B.J., Pyron, R.A., and J.J. Wiens. 2012. Polyploidization and sex chromosome evolution in amphibians. Ch. 18, pp. 385-410 In: Polyploidy and Genome Evolution. Soltis, D.E. and Soltis, P.S. (eds.): Springer-Verlag, Berlin. (PDF)


(36) Burbrink, F.T., Chen, X., Myers, E.A., Brandley, M.C., and R.A. Pyron. 2012. Evidence for determinism in species diversification and contingency in phenotypic evolution during adaptive radiation. Proceedings of the Royal Society of London B, Biological Sciences 279 (1478): 4817-4826. (PDF)


(35) Gomez-Mestre, I., R.A. Pyron, and J.J. Wiens. 2012. Phylogenetic analyses reveal unexpected patterns in the evolution of reproductive modes in frogs. Evolution 66 (12): 3687-3700. (PDF)


(34) Pyron, R.A. 2012. Book Reviews: Reptilian Cytogenetics and Genomics (E. Olmo, ed.). Copeia 2012 (3): 578-590. (PDF)


(33) Betancur-R., R., Orti, G., Stein, A.M., Marceniuk, A.P., and R.A. Pyron. Apparent signal of competition limiting diversification after ecological transitions from marine to freshwater habitats. Ecology Letters 15: 822-830. (PDF)


(32) Crother, B.I., Boundy, J., Burbrink, F.T., Campbell, J.A., and R.A. Pyron. 2012.  Squamata – Snakes. IN B. I. Crother (ed.), Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, With Comments Regarding Confidence In Our Understanding pp. 52–72. SSAR Herpetological Circular 39:1-92.(PDF)

(31) Guo, P., Liu, Q., Xu, Y., Jiang, K., Hou, M., Ding, L., Pyron, R.A., and F.T. Burbrink. Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis. Molecular Phylogenetics and Evolution 63(3): 825-833. (PDF)


(30) Burbrink, F.T., and R. A. Pyron. 2012. Erratum: Burbrink and Pyron (2011). Evolution 66(3): 942-943. (PDF)


(29) Pyron, R.A., and F.T. Burbrink. 2012. Trait-dependent diversification and the impact of paleontological data on evolutionary hypothesis testing in New World ratsnakes (tribe Lampropeltini). Journal of Evolutionary Biology 25(3): 497-508. (PDF)


(28) Burbrink, F.T., Ruane, S., and R.A. Pyron. 2012. When are adaptive radiations replicated in areas? Ecological opportunity and unexceptional diversification in West Indian dipsadine snakes (Colubridae: Alsophiini). Journal of Biogeography 39(3): 465-475. (PDF)


(27) Pyron, R.A., and F.T. Burbrink. 2012. Extinction, ecological opportunity, and the origins of global snake diversity. Evolution 66: 163-178. (PDF)



(26) Pyron, R. A., and J. J. Wiens. 2011. A large-scale phylogeny of Amphibia with over 2,800 species, and a revised classification of extant frogs, salamanders, and caecilians. Molecular Phylogenetics and Evolution 61: 543-583. (PDF)


(25) Wiens, J.J., R.A. Pyron, and D.S. Moen. 2011. Phylogenetic origins of local-scale diversity patterns and the causes of Amazonian megadiversity. Ecology Letters 14:643-652. (PDF)


(24) Burbrink, F.T., and R.A. Pyron. 2011. The impact of gene-tree/species-tree discordance on diversification rate estimation. Evolution 65:1851-1861. (PDF)


(23) Pyron, R.A. 2011. Divergence time estimation using fossils as terminal taxa and the origins of Lissamphibia. Systematic Biology 60: 466-481. (PDF)


(22) Ruane, S., Pyron, R.A., and F.T. Burbrink. 2011. Phylogenetic relationships of the Cretaceous frog Beelzebufo from Madagascar and the placement of fossil constraints based on temporal and phylogenetic evidence. Journal of Evolutionary Biology 24:274-285. (PDF)


(21) Pyron, R.A., Burbrink, F.T., Colli, G.R., Montes de Oca, A.N., Vitt, L.J., Kuczynski, C.A., and J.J. Wiens. 2011. The phylogeny of advanced snakes (Colubroidea), with discovery of a new subfamily and comparison of support methods for likelihood trees. Molecular Phylogenetics and Evolution 58: 329-342. (PDF)



(20) Brandley, M.C., Guiher, T.J., Pyron, R.A., Winne, C.T., and F.T. Burbrink. 2010. Does dispersal across an aquatic geographic barrier obscure phylogeographic structure in the diamond-backed watersnake (Nerodia rhombifer)? Molecular Phylogenetics and Evolution 57:552-560. (PDF)


(19) Pyron, R.A., and F.T. Burbrink. 2010. Hard and soft allopatry: physically and ecologically mediated modes of geographic speciation. Journal of Biogeography 37:2005-2015. (PDF)


(18) Burbrink, F.T., and R.A. Pyron. 2010. How does ecological opportunity influence rates of speciation, extinction, and morphological diversification in New World ratsnakes (tribe Lampropeltini)? Evolution 64:934-943. (PDF)


(17) Pyron, R.A. 2010. A likelihood method for assessing molecular divergence time estimates and the placement of fossil calibrations. Systematic Biology 59:185-194. (PDF) Code for implementing this method in R



(16) Pyron, R.A., and F.T. Burbrink. 2009. Systematics of the Common Kingsnake (Lampropeltis getula; Serpentes: Colubridae) and the burden of heritage in taxonomy. Zootaxa 2241:22-32. (PDF)


(15) Pyron, R.A., and F.T. Burbrink. 2009. Body size as a primary determinant of ecomorphological diversification and the evolution of mimicry in the lampropeltinine snakes. Journal of Evolutionary Biology 22:2057-2067.(PDF)


(14) Pyron, R.A., and F.T. Burbrink. 2009. Lineage diversification in a widespread species: roles for niche divergence and conservatism in the Common Kingsnake, Lampropeltis getulaMolecular Ecology 18:3443-3457. (PDF)


(13) Pyron, R. A. 2009. Rhadinaea flavilata: Geographic Distribution. Journal of Kansas Herpetology 30:11. (PDF)


(12) Pyron, R.A., and F.T. Burbrink. 2009. Can the Tropical Conservatism Hypothesis explain temperate species richness patterns? An inverse latitudinal biodiversity gradient in the New World snake tribe Lampropeltini. Global Ecology and Biogeography 18:406-415. (PDF)


(11) Pyron, R.A., and F.T. Burbrink. 2009. Neogene diversification and taxonomic stability in the snake tribe Lampropeltini (Serpentes: Colubridae). Molecular Phylogenetics and Evolution 52:524-529. (PDF)


(10) Wiens, J.J., J. Sukumaran, R.A. Pyron, and R.M. Brown. 2009. Evolutionary and biogeographic origins of high tropical diversity in Old World frogs (Ranidae). Evolution 63:1217-1231. (PDF)



(9) Pyron, R.A., F.T. Burbrink, and T.J. Guiher. 2008. Claims of potential expansion throughout the U.S. by invasive python species are contradicted by ecological niche models. PLoS ONE 3:e2931. (PDF)


(8) Burbrink, F.T., and R.A. Pyron. 2008. The taming of the skew: estimating proper confidence intervals for divergence dates. Systematic Biology 57:317–328. (PDF) Spreadsheet for calculating confidence intervals from Burbrink & Pyron (2008)


(7) Burbrink, F.T., F. Fontanella, R.A. Pyron, T.J. Guiher, and C. Jimenez. 2008. Phylogeography across a continent: the evolutionary and demographic history of the North American racer (Serpentes: Colubridae: Coluber constrictor). Molecular Phylogenetics and Evolution 47:274–288. (PDF)



(6) Pyron, R.A. 2007. A revised distribution of Masticophis in Kansas. Journal of Kansas Herpetology 24:16. (PDF)


(5) Pyron, R.A., and C.D. Camp. 2007. Courtship and mating behaviours of two syntopic species of skink (Plestiodon anthracinus and Plestiodon fasciatus). Amphibia–Reptilia 28:263–268. (PDF)



(4) McNearney, S.R., R.A. Pyron, M.R. Rochford, and G.N. Weatherman. 2005. Dierochelys reticularia (Chicken Turtle). Life History: Reproduction. Journal of Kansas Herpetology 13:9. (PDF)



(3) Jensen, J.B., Camp, C.D., Austin, R.M. Jr., Pyrson [sic], R.A., Giovanetto, L., Graham, S., Meadows, M., and D. Demarest. 2004. Cryptobranchus alleganiensis alleganiensis (Eastern Hellbender). Breeding Season. Herpetological Review 35(2): 156. (PDF)

(2) Pyron, R.A. 2004. Rhadinaea flavilata: Geographic Distribution. Journal of Kansas Herpetology 9:7. (PDF)



(1) Camp, C.D., and R.A. Pyron. 2003. Rana sylvatica: Geographic Distribution. Herpetological Review 34:382. (PDF)