Advertisement From what I understand, bites from tarantula's like P. murinus. S. calcaetum, H. maculata, etc basically most OW tarantula are very dangerous/ life threatening to pets. Now if I got bit because of some stupid error I made, I can live with that. But I can never forgive myself if my cat got seriously injured because of my mistake. Note: I am neither ready nor interested in owning OW tarantula's. My question is, where does the venom of the Psalmopoeus genus rank? I've read that their venom, as well as their temperament is a step up from other NW species.