Cephalaspidomorphs are a group of jawless fishes named for the cephalaspids, a group of osteostracans. Most biologists regard this taxon as extinct, but the name is sometimes used in the classification of lampreys because lampreys were once thought to be related to cephalaspids. If lampreys are included, they would extend the known range of the gr...
Found on
http://en.wikipedia.org/wiki/Cephalaspidomorphi
Cephalaspidomorphi Lampreys, hagfish; a class of agnathan vertebrates lacking true gill-arch jaws; contains two extant orders, Petromyzoniformes, Myxinformes, and the fossil Cephalaspidiformes. A lamprey is a jawless fish with teeth in a funnel-like sucking mouth, which most species use to bore into the flesh of other f...
Found on
http://www.wordinfo.info/words/index/info/view_unit/218/
No exact match found.
