Qualitative and Quantitative Proteomic Analysis of Venoms from Mexican Rattlesnakes

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  Qualitative and Quantitative Proteomic Analysis of Venoms from Mexican Rattlesnakes Abstract Despite the vast biodiversity of Mexican vipers, venom of endemic species has been barely studied. Here we analyzed the venom composition of three endemic species of rattlesnakes: Crotalus aquilus , C. triseriatus , and C. ravus . We used quantitative chromato-mass-spectrometry and compared venoms with C. molossus , a species commonly found in North America, in a comparative and phylogenetic framework. In total, we identified 165 proteins grouped in 19 main protein families, consistent with previous reports for viperid venoms. In C. aquilus and C. triseriatus , the most predominant protein-family type was Serine Proteases, and in C. triseriatus and C. molossus it was Snake Venom Metalloproteases. The Label-free quantification revealed a high proportion of Snake Venom Metalloproteases in C. aquilus , C. triseriatus , and C. molossus , reaching 28–47% of the total venom. In contrast, in ...

New species and first record of the genus Titanidiops Simon, 1903 from Sudan (Araneae: Idiopidae)

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New species and first record of the genus Titanidiops Simon, 1903 from Sudan (Araneae: Idiopidae) 

Abstract 

A new species of Titanidiops Simon, 1903 is described from Sudan, Titanidiops logunovi sp. nov. based on a holotype male from Galegu in the south of the country. It differs from other known congeners and the many African species currently misplaced in Idiops Perty, 1833 based on a combination of palpal bulb, tibial, and sternal morphology.

Bariev, T. B. & Sherwood, D. (2025c). New species and first record of the genus Titanidiops Simon, 1903 from Sudan (Araneae: Idiopidae). Arachnology 20(3): 329-332.