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...

A New Species of the Medically Important Scorpion Genus Hemiscorpius Peters, 1861 (Hemiscorpiidae Pocock, 1893) from Kurdistan, Iraq

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A New Species of the Medically Important Scorpion Genus Hemiscorpius Peters, 1861 (Hemiscorpiidae Pocock, 1893) from Kurdistan, Iraq

Abstract

The scorpion genus Hemiscorpius Peters, 1861 is renowned for its medically important species, particularly Hemiscorpius lepturus Peters, 1861, the type species of the genus and only species previously recorded in Iraq. However, the scorpion diversity of the rugged, arid landscapes of the Kurdistan Region, especially Erbil Governorate, in northern Iraq, remains largely unknown. Extensive fieldwork in Erbil Province in 2024 resulted in the discovery of a previously unknown species, described herein as Hemiscorpius kurdistanus sp. n. The Halgurd-Sakran Mountains in the Bradost Region, to which it appears to be endemic, probably played a role in its speciation, providing a barrier that contributed to geographical isolation. The new discovery supports the hypothesis that Kurdistan represents an area of endemism for arthropods due to its isolation and unique environmental conditions. The addition of a new, potentially medically important scorpion species to the Iraqi fauna emphasizes the need for continued studies on the systematics of Hemiscorpius and other scorpion taxa as well as updated public health awareness and envenomation management strategies across the Middle East.

Hussen FS, Kadir HS, Ahmed AI, Prendini L. A New Species of the Medically Important Scorpion Genus Hemiscorpius Peters, 1861 (Hemiscorpiidae Pocock, 1893) from Kurdistan, Iraq. Diversity. 2026; 18(2):121. https://doi.org/10.3390/d18020121