Molecular Systematics and Evolution of Regina and the Thamnophiine Snakes

Alfaro, Michael E.; Arnold, Stevan J.

doi:10.1006/mpev.2001.1024

Cited by 89 publications

(83 citation statements)

References 42 publications

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“…1). Similar to Pyron et al (2011) and Alfaro and Arnold (2001), several NW thamnophiine genera are demonstrated to be paraphyletic, including Thamnophis, Nerodia and Regina. If these results are supported by sampling of additional species, loci, and coalescent-based species tree analyses, then major taxonomic rearrangements would be necessary to correct paraphyletic genera in both clades.…”

Section: Systematics Of Natricinaementioning

confidence: 91%

“…Previous research using morphological and molecular data have indicated that the New World natricines form a monophyletic group (i.e., Thamnophiini) which might indicate that they originated as a single dispersal from OW groups (Rossman and Eberle, 1977;Lawson, 1987;Alfaro and Arnold, 2001;de Queiroz et al, 2002). Malnate (1960) previously proposed that the natricines originated in Asia and dispersed from there to Europe, Africa, Australia and North America, and that Natrix (sensu lato) dispersed to North America over the Bering Strait.…”

Section: Introductionmentioning

confidence: 99%

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Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis

Guo

Liu

et al. 2012

Molecular Phylogenetics and Evolution

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Section: Systematics Of Natricinaementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis

Guo

Liu

et al. 2012

Molecular Phylogenetics and Evolution

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“…1 and Table S1). To provide a phylogenetic perspective on the evolution of elevated TTX resistance, we also collected resistance data from 228 specimens from 7 other garter snakes species representing the major Thamnophis clades (33) and from 34 snakes from 4 outgroup taxa representing pertinent New World natricine lineages (54) (Table S1). Some TTX resistance data came from our previous work (24,37).…”

Section: Methodsmentioning

confidence: 99%

The evolutionary origins of beneficial alleles during the repeated adaptation of garter snakes to deadly prey

Feldman

Brodie²,

Pfrender³

2009

Proc. Natl. Acad. Sci. U.S.A.

115

178

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Where do the genetic variants underlying adaptive change come from? Are currently adaptive alleles recruited by selection from standing genetic variation within populations, moved through introgression from other populations, or do they arise as novel mutations? Here, we examine the molecular basis of repeated adaptation to the toxin of deadly prey in 3 species of garter snakes (Thamnophis) to determine whether adaptation has evolved through novel mutations, sieving of existing variation, or transmission of beneficial alleles across species. Functional amino acid substitutions in the skeletal muscle sodium channel (Na v1.4) are largely responsible for the physiological resistance of garter snakes to tetrodotoxin found in their newt (Taricha) prey. Phylogenetic analyses reject the hypotheses that the unique resistance alleles observed in multiple Thamnophis species were present before the split of these lineages, or that alleles were shared among species through occasional hybridization events. Our results demonstrate that adaptive evolution has occurred independently multiple times in garter snakes via the de novo acquisition of beneficial mutations.coevolution ͉ genetic variation ͉ sodium channel ͉ tetrodotoxin ͉ Thamnophis

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“…(2012) Opisthotropis typica HT0794Malaysia LC325343 LC325789 LC326028 This study Pseudoxenodon macrops (Out group)_1HT0646China LC325323 LC325769 –This study Pseudoxenodon macrops (Out group)_2HT0802Malaysia LC325351 LC325797 –This study Regina grahami –USA AF402918 ––Alfaro and Arnold (2001) Regina rigida _1–USA AF402919 ––Alfaro and Arnold (2001) Regina rigida _2CAS:HERP:165994USA AF471052 AF471120 –Lawson et al. (2005) Regina septemvittata –USA…”

Section: Accession Numbers and Their Localities (Countries) For All Dmentioning

confidence: 97%

Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny

Takeuchi

Savitzky

Ding

et al. 2018

Ecology and Evolution

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A large body of evidence indicates that evolutionary innovations of novel organs have facilitated the subsequent diversification of species. Investigation of the evolutionary history of such organs should provide important clues for understanding the basis for species diversification. An Asian natricine snake, Rhabdophis tigrinus, possesses a series of unusual organs, called nuchal glands, which contain cardiotonic steroid toxins known as bufadienolides. Rhabdophis tigrinus sequesters bufadienolides from its toad prey and stores them in the nuchal glands as a defensive mechanism. Among more than 3,500 species of snakes, only 17 Asian natricine species are known to possess nuchal glands or their homologues. These 17 species belong to three nominal genera, Balanophis, Macropisthodon, and Rhabdophis. In Macropisthodon and Rhabdophis, however, species without nuchal glands also exist. To infer the evolutionary history of the nuchal glands, we investigated the molecular phylogenetic relationships among Asian natricine species with and without nuchal glands, based on variations in partial sequences of Mt‐CYB, Cmos, and RAG1 (total 2,767 bp). Results show that all species with nuchal glands belong to a single clade (NGC). Therefore, we infer that the common ancestor of this clade possessed nuchal glands with no independent origins of the glands within the members. Our results also imply that some species have secondarily lost the glands. Given the estimated divergence time of related species, the ancestor of the nuchal gland clade emerged 19.18 mya. Our study shows that nuchal glands are fruitful subjects for exploring the evolution of novel organs. In addition, our analysis indicates that reevaluation of the taxonomic status of the genera Balanophis and Macropisthodon is required. We propose to assign all species belonging to the NGC to the genus Rhabdophis, pending further study.

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Molecular Systematics and Evolution of Regina and the Thamnophiine Snakes

Cited by 89 publications

References 42 publications

Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis

Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis

The evolutionary origins of beneficial alleles during the repeated adaptation of garter snakes to deadly prey

Evolution of nuchal glands, unusual defensive organs of Asian natricine snakes (Serpentes: Colubridae), inferred from a molecular phylogeny

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