ABSTRACT
Two new species of the Tityus genus are described. T. isabelceciliae n. sp lives on the northern central slope of the Cordillera de la Costa. It belongs to the discrepans group and is dangerous to man due to its high number, aggressive behavior, domiciliary habits, and high toxicity of its venom. T. isabelceciliae venom is similar to other Tityus in relation to the molecular weight range and the biological activity of its components. However, the proportions of each fraction in the venom pooled from many T. isabelceciliae differ from the proportions in other Tityus, indicating that these proportions may have a taxonomical value. The venom LD50 is 38.1 (36.3, 39.9) µg/g mouse (Death in 30 min, Dixon and Mood (14) sequential method, median and 95 per cent confidence interval, n=7). Venom production was 916 (625, 1213) µg protein per animal (n=38): females [944 (750, 1150) mg protein per animal, n=24] and males [824 (550, 112) mg protein per animal, n=14] did not differ in venom production (P>0.05). There was no correlation between animal total weight and venom production. T. rusmelyae n. sp. from the androcottoides group lives near the town of Humocaro Alto in the Lara State, Venezuela. The male specimens have clearly defined keels and granules. It differs from other species of this genus in that the prominent characteristics are observed in male specimens.
Subject(s)
Animals , Male , Female , Spider Bites , Scorpion Venoms/analysis , Scorpion Venoms/toxicity , Venezuela , Scorpions/anatomy & histology , Scorpions/classificationABSTRACT
Se describe una nueva familia, dos nuevos géneros y dos nuevas especies de Opiliones Laniatores, los cuales son anoptalmos y hemiedáficos. Se caracterizan por la forma de los pedipalpos y de las II patas ambulatorias. Habitan bajo la corteza de tallos en descomposición. Se presentan tablas con los caracteres métricos y figuras ilustrativas de diversos caracteres morfológicos
Subject(s)
Animals , Arachnida/classification , VenezuelaABSTRACT
Se describe Stenoschizomus tejeriensis n. gen., n. sp, caracterizado por el dimorfismo sexual de los pedipalpos, una nueva especie del género Schizomus y se redescribe Schizomus simoni hansen y sorensen, 1905. Habitan en la región central del Sistema montañoso de la Costa. Se presentan tablas con caracteres métricos y dibujos ilustrativos
Subject(s)
Animals , Arachnida/classification , VenezuelaABSTRACT
Seis nuevas especies del género tityus incrementan la escorpiofauna de Venezuela. Tityus pococoki hirst 1911 sustituye a tityus kraepelinianus Mello- Leit