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...

Exploring the diversity of scorpions in Lahore Division, Punjab: an ecological approach

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Exploring the diversity of scorpions in Lahore Division, Punjab: an ecological approach

Abstract

The present study investigates the scorpion fauna of Lahore Division, Punjab, Pakistan, focusing on species diversity, distribution patterns, and ecological adaptations. A total of 124 specimens, comprising 92 adults, and 22 juveniles were sampled from 25 sites using pitfall traps, stone turning, and UV light detection methods. Identified species included Hottentotta tamulus, Odontobuthus odonturus, and Androctonus finitimus. Animals were categorized by sex, developmental stages, and habitat associations. Males accounted for 36.29%, females 45.96%, and juveniles 17.74% of the total sample. H. tamulus was documented across Kasur, Sheikhupura, Lahore, and Nankana Sahib, predominantly inhabiting rock crevices, brick walls, and mud walls. A. finitimus was confined to sandy substrates in Kasur, displaying aggressive predatory behavior and cannibalism. O. odonturus occurred in arid zones with sparse vegetation, exhibiting semi-social burrowing tendencies. All species exhibited nocturnal activity, with peak movements recorded between 8 and 11 PM. Spatial distribution hotspots were identified and mapped at a quarter-degree square resolution. This study provides a detailed assessment of scorpion species diversity, distribution, and ecological adaptations within Lahore Division. The findings highlight their habitat preferences and behavioral strategies, contributing to a broader understanding of scorpion ecology.

Ahsan, M.M., Khalaq, A., Tahir, H.M. et al. Exploring the diversity of scorpions in Lahore Division, Punjab: an ecological approach. Int J Trop Insect Sci (2025). https://doi.org/10.1007/s42690-024-01425-z