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12 - Origin and Early Diversification of the Enigmatic Squamate Venom Cocktail

from Part III - Genomic Perspectives

Published online by Cambridge University Press:  30 July 2022

By
Vivek Suranse ,
Ashwin Iyer ,
Timothy N. W. Jackson  and
Kartik Sunagar
Edited by
David J. Gower  and
Hussam Zaher
David J. Gower
Affiliation:
Natural History Museum, London
Hussam Zaher
Affiliation:
Universidade de São Paulo
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Summary

Venom, a specialized form of poison, is actively injected by the venomous organism into its target animal to facilitate several quotidian functions. Over a hundred convergent origins of this remarkable functional trait, along with intricate mechanisms of venom delivery, have been documented across animals. Pinpointing the emergence of venom in squamate reptiles has important implications for understanding the evolutionary history of snakes, but it has been challenging. Several competing hypotheses have been put forth to explain the evolutionary origin of squamate venom, including assertions of single, dual and multiple origins. In this chapter, in addition to a summary of this ongoing dialogue, we provide an overview of ecology, composition, delivery mechanisms, and evolutionary models that explain the possible origin and diversification of venom in squamate reptiles.

Keywords

snakeslizardsevolutionvenomicsfangsadaptationvenom glandstranscriptomicsgenomicsToxicofera
Type
Chapter
Information
The Origin and Early Evolutionary History of Snakes , pp. 248 - 268
Publisher: Cambridge University Press
Print publication year: 2022

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