Parent taxon: Vertebrata according to T. Miyashita et al. 2019
Sister taxa: Acrania, Agnatha, Ammopus, Anaspidomorphi, Apedolepis, Artenolepis, Cephalaspidomorpha, Craniota, Cyclostomata, Eosaurus, Eotetrapoda, Galeaspida, Gnathostomata, Herpetichthyes, Hoplichnus, Hypichthyes, Lepidotosaurus, Mannodon, Myzichthyes, Ophis, Osteostracomorphi, Ostracophori, Pachycardia, Palaeoxyris, Petromyzontomorphi, Pituriaspida, Protetrapoda, Pteraspidomorphi, Saurornia, Thelodontomorphi, Thoracophis, Tidaeus, Toxichnus, Zamponiopteron, Myxinomorphi, Conodontomorpha, Coluber arcuatus, Myllokunmingiiformes
Subtaxa: Squirmarius
Ecology:
Distribution:
• Carboniferous of United States (3: Illinois collections)
Total: 3 collections each including a single occurrence