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

Posted by
  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...

Re-examination of the type materials of seven species of Plexippina (Araneae, Salticidae) from China

Posted by

 


Re-examination of the type materials of seven species of Plexippina (Araneae, Salticidae) from China

Abstract

The type specimens of seven species of the subtribe Plexippina from China are re-examined, and detailed illustrations of the habitus and copulatory organs are provided. Three species retain their current taxonomy: Evarcha wulingensis Peng, Xie & Kim, 1993, Pancorius goulufengensis Peng, Yin, Yan & Kim, 1998, Thyene yuxiensis Xie & Peng, 1995. The other four species have taxonomic changes and are to be treated as synonyms as follows: Telamonia luxiensis (Peng, Yin, Yan & Kim, 1998), syn. nov. (= Epeus bicuspidatus (Song, Gu & Chen, 1988)); Thyene radialis Xie & Peng, 1995 was previously synonymised with Thyene orientalis Żabka, 1985; Thyene triangula Xie & Peng, 1995, syn. nov. (= Ptocasius montiformis Song, 1991); Thyene zhangi (Peng, Yin, Yan & Kim, 1998), syn. nov. (= Thyene orientalis Żabka, 1985).

Zhou Y, Peng X (2026) Re-examination of the type materials of seven species of Plexippina (Araneae, Salticidae) from China. ZooKeys 1293: 221-239. https://doi.org/10.3897/zookeys.1293.203377