Differential Hematotoxic Activity of Southeast Asian Pit Viper Venoms: The Cross-Neutralizing Effect of Available Antivenoms

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  Image Credit: Creative Commons (some rights reserved) CC BY-NC Photo 111998430, (c) Nicholas Hess Differential Hematotoxic Activity of Southeast Asian Pit Viper Venoms: The Cross-Neutralizing Effect of Available Antivenoms Abstract Background/Objectives : Pit vipers (subfamily Crotalinae) are responsible for a large proportion of snakebite envenoming cases in Southeast Asia. Envenomation by these snakes commonly causes hematotoxic effects, including platelet dysfunction and coagulation disturbances. Although antivenom remains the mainstay of treatment, species-specific antivenoms are not available for several regional pit viper species. This study evaluated the hematotoxic activities of selected Southeast Asian pit viper venoms and the cross-neutralizing capacity of commercially available antivenoms.  Methods : Venoms from five medically important pit viper species— Calloselasma rhodostoma ,  Trimeresurus albolabris ,  T. hageni ,  T. purpureomaculatus , ...

Six new species of Pandercetes L. Koch, 1875 (Araneae: Sparassidae: Heteropodinae) from Southeast Asia

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Six new species of Pandercetes L. Koch, 1875 (Araneae: Sparassidae: Heteropodinae) from Southeast Asia

Abstract

Six new species, Pandercetes batak sp. nov. (♂♀), P. barisanensis sp. nov. (♀; both from Sumatra, Indonesia), P. cheemai sp. nov. (♂♀; Laos), P. mindanaoensis sp. nov. (♂; Philippines, Mindanao), P. jaegeri sp. nov. (♀) and P. bataanensis sp. nov. (♀; both from Philippines, Luzon) are described. The genus is recorded from Laos, Philippines and Sumatra for the first time. The discovery of P. cheemai sp. nov. represents the northernmost record for the genus range. Genus Pandercetes is re-diagnosed. For two species, P. longipes Thorell, 1881 and P. peronianus (Walckenaer, 1837), the distribution data listed in the World Spider Catalog was found to be inaccurate and has now been revised. Detailed descriptions, digital photographs and a distributional map of all new species are provided.

Omelko, M.M. & Fomichev, A.A. (2026) Six new species of Pandercetes L. Koch, 1875 (Araneae: Sparassidae: Heteropodinae) from Southeast Asia. Zootaxa, 5787 (2), 291–312. https://doi.org/10.11646/zootaxa.5787.2.4