Devonian - Recent | image =Havsnejonöga.jpg | image_width = 250px | image_caption = Sea lamprey from Sweden | regnum = Animalia | phylum = Chordata | unranked_classis = Hyperoartia | subdivision_ranks = subgroups | subdivision = Jamoytius Endeiolepis Euphanerops Petromyzontiformes (lampreys) }} Hyperoartia's a group of jawless fishes that includes the modern lampreys and their fossil relatives, the jawless fishes of the class Anaspida. Example of hyperoartian from early in their fossil rec… (More on Hyperoartia)