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 ...

The occasionally broken tibial apophysis of male Oxyopes heterophthalmus (Latreille, 1804) (Araneae: Oxyopidae)

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The occasionally broken tibial apophysis of male Oxyopes heterophthalmus (Latreille, 1804) (Araneae: Oxyopidae)

Abstract and figures
The breakage of the distinctive laterally bent tibial apophysis found on the male palp of Oxyopes heterophthalmus (La-treille, 1804) has been discussed textually in prior works, but no illustrations of such palps have been published. We herein provide the first photographs of post-breakage palps, to aid future workers in recognising injured palps of this species, also discussing how such palps can be readily visually distinguished from teratological morphology. Rotura ocasional de la apófisis tibial del palpo en machos de Oxyopes heterophthalmus (Latreille, 1804) (Araneae: Oxyopidae).

Tchilinguirian, Julien & Sherwood, Danniella. (2025). The occasionally broken tibial apophysis of male Oxyopes heterophthalmus (Latreille, 1804) (Araneae: Oxyopidae). Revista Ibérica de Aracnología. 47. 155–157.