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...

First record of the spider genus Diphya Nicolet 1849 (Araneae, Tetragnathidae) and new species from northern Peru

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First record of the spider genus Diphya Nicolet 1849 (Araneae, Tetragnathidae) and new species from northern Peru

Abstract

Spiders of the genus Diphya (Nicolet) are characterized by having tibiae-tarsi I and II with stiff, curved prolateral setae. Currently, the genus comprises 21 species, six of which are recorded from America: the type species and three others from southern Chile (one also recorded in Argentina), one from Ecuador, and one from Brazil. Ba-sed on males and females collected in a montane forest in Cañaris, Lambayeque, northern Peru, a new species of Diphya, D. muchik sp. nov., is diagnosed, described, and illustrated. This represents the first record of the genus in Peru.

Dávila, D. S., & Mendieta-Yañez, S. (2025). First record of the spider genus diphya nicolet 1849 (araneae, tetragnathidae) and new species from northern peru. [Primer registro del género de arañas Diphya Nicolet 1849 (Araneae, Tetragnathidae) y una nueva especie del norte de Perú] Revista Peruana De Biologia, 32(3), 1-8. doi:https://doi.org/10.15381/rpb.v32i3.31498