Distinct pathophysiological mechanisms of Heterometrus laoticus and Lychas mucronatus scorpion venoms on cardiovascular and renal functions

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  Distinct pathophysiological mechanisms of Heterometrus laoticus and Lychas mucronatus scorpion venoms on cardiovascular and renal functions Abstract Background:    Heterometrus laoticus and Lychas mucronatus are widely distributed in Southeast Asia, yet their pathophysiological effects of both venoms remain poorly characterized due to low human fatality rates. This study compared their venom compositions and acute cardiovascular and renal effects. Methods:   Anesthetized male New Zealand White rabbits were monitored for blood pressure (BP), heart rate (HR), and renal clearance following intravenous administration of crude venom (0.5 mg/kg). Venom components were identified via LC-MS/MS, and hematological/biochemical parameters were assessed. Results:    H. laoticus venom induced a rapid, transient hypotension ( p < 0.05), followed by a mild, prolonged hypotensive phase (up to 120 min). Conversely, L. mucronatus venom elicited a biphasic response: ...

A new species of Raveniola Zonstein, 1987 (Araneae, Nemesiidae) from Fujian, China

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A new species of Raveniola Zonstein, 1987 (Araneae, Nemesiidae) from Fujian, China

Abstract

Background

The genus Raveniola Zonstein, 1987 comprises 66 species, distributed across regions from East Asia to the Caucasus, with about 20 species recorded from China. According to Zonstein et al. (2018) and Zonstein (2024), members of Raveniola can be identified by the presence of two to three retroventral megaspines arranged sequentially on tibia I in males and paired spermathecae in females, each bearing two-branched heads or a lateral diverticulum.

New information

A new mygalomorph species, Raveniola fuzhouensis Zhou, sp. nov., is described from Fujian Province, China. Detailed description, diagnosis, illustrations and a distribution map of the new species are provided.

Zhou G, Lu J, Cui M, Xu J (2025) A new species of Raveniola Zonstein, 1987 (Araneae, Nemesiidae) from Fujian, China. Biodiversity Data Journal 13: e142264. https://doi.org/10.3897/BDJ.13.e142264