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 ...

Three new species of Melychiopharis (Araneae, Araneidae) from Ecuador and Peru

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Three new species of Melychiopharis (Araneae, Araneidae) from Ecuador and Peru

Abstract

Three new species of the peculiar Neotropical endemic genus Melychiopharis Simon, 1895, previously known from two species from Brazil, are herein described: from Ecuador, M. komischetier Dupérré & Tapia sp. nov. (♂♀) and M. davincii Dupérré & Tapia sp. nov. (♂); from Peru, M. peruviana Eskov & Marusik sp. nov. (♂♀). Scanning electron microscope images of the spinnerets and male palp are presented for the first time and a distribution map of all Melychiopharis species occurring in South America is presented.

Dupérré, N., Tapia, E., Marusik, Y. M. & Eskov, K. Y. (2024b). Three new species of Melychiopharis (Araneae, Araneidae) from Ecuador and Peru. Zootaxa 5555(1): 75-90. doi:10.11646/zootaxa.5555.1.5