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: ...

Systematics of the Aliatypus erebus Group (Mygalomorphae, F. Antrodiaetidae): Exploring a Possible Ring of Species Around the California Central Valley (Full Text Dissertation or Thesis)

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Systematics of the Aliatypus erebus Group (Mygalomorphae, F. Antrodiaetidae): Exploring a Possible Ring of Species Around the California Central Valley (Full Text Dissertation or Thesis)

The Aliatypus erebus group represents a monophyletic radiation of trapdoor spiders with a ring-like distribution around California's Central Valley, shaped by long-term geological events and exhibiting substantial cryptic diversity and geographic structuring.

Additional topics discussed include:
  • Phylogenomic methods using ultra conserved elements (UCE)
  • Impact of tectonic activity and fault systems on species diversification
  • Cryptic speciation and species delimitation in low-dispersal arthropods


Hays, T. G. (2026). Systematics of the aliatypus erebus group (mygalomorphae, F. antrodiaetidae): Exploring a possible ring of species around the california central valley (Order No. 32582807). Available from ProQuest Dissertations & Theses Global. (3330504647). https://www.proquest.com/dissertations-theses/systematics-em-aliatypus-erebus-group/docview/3330504647/se-2