Class Arachnida Lamarck 1801 (arthropod)
Parent taxon: Sclerophorata according to J. C. Lamsdell 2013
See also Nielsen 2012 and Sepkoski 2002
Sister taxon: Eurypterida
Subtaxa: Acari Acaromorpha Arthrolycosa prolifera Cretopilio Haplocnemata Palpigradi Pantetrapulmonata Parasitiformes Phalangiotarbida Pleurolycosa Podurites Podurites saltator Poecilophysidea Pseudoscorpionida Ricinulei Stomothecata
Ecology: nektobenthic carnivore