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: ...

Rediscovery of a rare species of Paruroctonus (Scorpiones: Vaejovidae) from Big Bend National Park, Texas

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Rediscovery of a rare species of Paruroctonus (Scorpiones: Vaejovidae) from Big Bend National Park, Texas

ABSTRACT 

A recent search at Big Bend National Park has recovered specimens of Paruroctonus williamsi after a lapse of over 50 years with no records of the species, underscoring the importance of continued monitoring for rare species. This study includes photographs of living specimens, documentation of their habitat, comparisons with other species of Paruroctonus found at Big Bend National Park, and a list of scorpions observed near P. williamsi.

Many thanks to Western North American Naturalist, BYU, for providing me with the full-paper.

Leister, Matthew (2024) "Rediscovery of a rare species of Paruroctonus (Scorpiones: Vaejovidae) from Big Bend National Park, Texas," Western North American Naturalist: Vol. 84: No. 4, Article 10.