Two new arthropod toxins purified from the venom of the Mexican scorpion Centruroides nigrescens

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  Two new arthropod toxins purified from the venom of the Mexican scorpion Centruroides nigrescens Abstract The venom of the slender black scorpion Centruroides nigrescens , from the State of Guerrero México, was fractionated by Sephadex G–50 gel filtration, followed by carboxymethyl cellulose ion separation and high–performance liquid chromatography, permitting to obtain two new peptides toxic to arthropods. The estimate LD 50 of the soluble venom for the insect Acheta domesticus was 11.1 μg/g body weight, and for the arthropod Armadillidium vulgare was 61.1 μg body weight . The amino acid sequence of toxin Cnige1 (toxic to A. domesticus and A. vulgare ) contains 65 amino acids, with a molecular mass of 7273.37 mass units, whereas toxin Cnige2, toxic to A. domesticus , contains 68 amino acids, with a molecular mass of 7548.81 units. Both peptides are well packed, containing 8 cysteines, which in the native venoms are forming 4 disulfide bridges each. The amino acid sequences f...

A revision of the genus Coryssiphus Simon, 1903, with its transfer to Systariinae (Araneae: Miturgidae)

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A revision of the genus Coryssiphus Simon, 1903, with its transfer to Systariinae (Araneae: Miturgidae)


Abstract

The genus Coryssiphus Simon, 1903 is redescribed and found to be composed of two species. Coryssiphus unicolor Simon, 1903 is synonymised with C. cinerascens Simon, 1903, being the female of that species. Coryssiphus praeustus Simon, 1903 and C. cinerascens are redescribed and the genus is transferred from Liocranidae to Miturgidae: Systariinae based on a number of somatic and genitalic characters. The peculiar presence of Coryssiphus in Africa is briefly discussed.


Bosselaers, J. (2024). A revision of the genus Coryssiphus Simon, 1903, with its transfer to Systariinae (Araneae: Miturgidae). Zootaxa 5415(1): 153-168. doi:10.11646/zootaxa.5415.1.7 

https://wsc.nmbe.ch/refincluded/17638