Order Petromyzontiformes Berg 1940 (lamprey)
Alternative spelling: Petromyzoniformes
Synonym: Hyperoartii
Parent taxon: Hyperoartia according to R. W. Gess et al. 2006
See also Long 2011, Nelson et al. 2016, Sepkoski 2002 and Van Der Laan 2019
Sister taxa: none
Subtaxa: Euphanerops Geotriidae Hardistiellidae Mayomyzon Mayomyzontidae Mesomyzon Mordaciidae Petromyzontidae Priscomyzon
Ecology: