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 ...

A new species of Euathlus (Araneae: Theraphosidae) from northern Chile, with morphological novelties for the genus

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A new species of Euathlus (Araneae: Theraphosidae) from northern Chile, with morphological novelties for the genus 

Abstract 

A new species of Euathlus Ausserer 1875 is described from the Coquimbo Region, Chile. Euathlus sinapophysis sp. nov. is differentiated from its congeners by the presence of an oval patch of setae on the ventral surface of the abdomen and the absence of a tibial apophysis on the first leg of males. Both morphological characteristics are reported for the first time for the genus. 

Montenegro, Rubén & Aguilera, Milenko. (2025). UNA ESPECIE NUEVA DE EUATHLUS (ARANEAE: THERAPHOSIDAE) DEL NORTE DE CHILE, CON NOVEDADES MORFOLÓGICAS PARA EL GÉNERO. Revista Ibérica de Aracnología. 47. 3-8.