Transcriptomic Insights Into the Evolution of Snake Venom: Mechanisms, Diversity, and Adaptation

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  Transcriptomic Insights Into the Evolution of Snake Venom: Mechanisms, Diversity, and Adaptation Abstract Snake venoms are evolutionarily refined biochemical arsenals composed of diverse toxins with complex functional roles in predation, defense, and competition. Over the past 2 decades, transcriptomic approaches have transformed venom research by enabling high-resolution insights into gene expression dynamics, molecular diversity, and the evolutionary mechanisms driving venom variation across lineages. In this review, we present a comprehensive synthesis of snake venom transcriptomics literature and propose a conceptual framework structured around three major axes: (1) gene family expansion through duplication and neofunctionalization; (2) regulatory complexity encompassing transcriptional, posttranscriptional, and epigenetic modulation; and (3) ecological selection pressures shaping venom profiles in response to diet, habitat, and interspecific interactions. We integrate findin...

Description of previously overlooked specimens of Nemesia rastellata (Araneae, Mygalomorphae: Nemesiidae) from the type locality, with notes on functional aspects of male morphology

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Description of previously overlooked specimens of Nemesia rastellata (Araneae, Mygalomorphae: Nemesiidae) from the type locality, with notes on functional aspects of male morphology


Abstract


Previously overlooked material of Nemesia rastellata Wunderlich, 2011, collected at the type locality and present in the collection of the Senckenberg Museum in Frankfurt am Main, is here described. This description provides important new information for taxonomical recognition of the species and the first observations on intraspecific variations in size and shape in N. rastellata. Additionally, aspects of male morphology in Nemesia trapdoor spiders are discussed from a functional perspective.

Decae, A. (2023). Description of previously overlooked specimens of Nemesia rastellata (Araneae, Mygalomorphae: Nemesiidae) from the type locality, with notes on functional aspects of male morphology. Arachnologische Mitteilungen 65: 5-7.