Possible Dual Mimicry of Bothrops and Micrurus by the Colubrid, Lystrophis dorbignyi

Yanosky, Ángel Alberto; Chani, José M.

doi:10.2307/1564001

Cited by 8 publications

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“…In the latter behavior, the individual lies on its back and exposes its ventral surface, which in H. nasicus is contrastingly patterned. Presumptive aposematic and mimetic behaviors also are known in the independently evolved South American xenodontine genus Lystrophis (Yanosky and Chani 1988 ; Baptista de Oliveira et al 2000 ), and several other bufophagous taxa engage specifically in “death-feigning,” including Natrix natrix (Colubridae: Natricinae; Gregory et al 2007 ; Gregory 2008 ) and, most remarkably, the spitting cobra Hemachatus (Elapidae; Rasmussen et al 2009 ), which clearly has other effective defensive behaviors at its disposal.…”

Section: Common Themes and Candidate Taxamentioning

confidence: 99%

Sequestered defensive toxins in tetrapod vertebrates: principles, patterns, and prospects for future studies

et al. 2012

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Chemical defenses are widespread among animals, and the compounds involved may be either synthesized from nontoxic precursors or sequestered from an environmental source. Defensive sequestration has been studied extensively among invertebrates, but relatively few examples have been documented among vertebrates. Nonetheless, the number of described cases of defensive sequestration in tetrapod vertebrates has increased recently and includes diverse lineages of amphibians and reptiles (including birds). The best-known examples involve poison frogs, but other examples include natricine snakes that sequester toxins from amphibians and two genera of insectivorous birds. Commonalities among these diverse taxa include the combination of consuming toxic prey and exhibiting some form of passive defense, such as aposematism, mimicry, or presumptive death-feigning. Some species exhibit passive sequestration, in which dietary toxins simply require an extended period of time to clear from the tissues, whereas other taxa exhibit morphological or physiological specializations that enhance the uptake, storage, and/or delivery of exogenous toxins. It remains uncertain whether any sequestered toxins of tetrapods bioaccumulate across multiple trophic levels, but multitrophic accumulation seems especially likely in cases involving consumption of phytophagous or mycophagous invertebrates and perhaps consumption of poison frogs by snakes. We predict that additional examples of defensive toxin sequestration in amphibians and reptiles will be revealed by collaborations between field biologists and natural product chemists. Candidates for future investigation include specialized predators on mites, social insects, slugs, and toxic amphibians. Comprehensive studies of the ecological, evolutionary, behavioral, and regulatory aspects of sequestration will require teams of ecologists, systematists, ethologists, physiologists, molecular biologists, and chemists. The widespread occurrence of sequestered defenses has important implications for the ecology, evolution, and conservation of amphibians and reptiles.

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Section: Common Themes and Candidate Taxamentioning

confidence: 99%

Sequestered defensive toxins in tetrapod vertebrates: principles, patterns, and prospects for future studies

et al. 2012

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“…The Neotropical snake genus Xenodon H. Boie, 1826 consists of medium-sized species with terrestrial or fossorial habits, in addition to species that mimic coral snakes (genus Micrurus Wagler, 1824) and pitvipers (genus Bothrops Wagler, 1824) (Yanosky and Chani 1988;Cabral et al 2022). The morphology of these snakes varies, with some having a rounded rostral scale, while others present a modified keeled rostral scale (Grazziotin et al 2012).…”

Section: Introductionmentioning

confidence: 99%

First record of Xenodon nattereri (Steindachner, 1869) (Reptilia, Squamata, Dipsadidae) from Paraguay

Cacciali¹,

Ortega²

2023

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2022

Venomous Bites From Non-Venomous Snakes

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Possible Dual Mimicry of Bothrops and Micrurus by the Colubrid, Lystrophis dorbignyi

Cited by 8 publications

References 6 publications

Sequestered defensive toxins in tetrapod vertebrates: principles, patterns, and prospects for future studies

Sequestered defensive toxins in tetrapod vertebrates: principles, patterns, and prospects for future studies

First record of Xenodon nattereri (Steindachner, 1869) (Reptilia, Squamata, Dipsadidae) from Paraguay

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