Pain-related spider species. Mygalomorph and araneomorph spiders are

Eight legs, two fangs and an attitude

Mygalomorph Spiders: Part 1, Tricky Assassins

PDF] Molecular phylogenetics of the spider infraorder Mygalomorphae using nuclear rRNA genes (18S and 28S): conflict and agreement with the current system of classification.

Pain-related scorpion species. Scorpion species of medical importance

Overview of Spider Envenoming

Atrax - an overview ScienceDirect Topics

Which spider is more dangerous between a tarantula and a red back? - Quora

What are the dangers of the Brazilian salmon pink tarantula spider to humans, and how does it differ from other species of spiders? - Quora

What is a tarantula? What makes them different from other spiders, if anything at all? Do they have any special abilities that normal spiders don't have (other than being able to bite)?

Araneomorphae - an overview

Four new species of mygalomorph spiders (Araneae, Halonoproctidae and Theraphosidae) from the Colombian Pacific region (Bahía Solano, Chocó)