Anaspida ("shieldless ones") is an extinct group of jawless fish that existed from the early Silurian period to the late Devonian period. They were classically...

? †Thelodonti, †Conodonta, †Anaspida...

Class †Myllokunmingiida Class †Pteraspidomorphi Class †Thelodonti Class †Anaspida Class †Cephalaspidomorphi Infraphylum Gnathostomata (jawed vertebrates)...

Class Pteraspidomorphi † (early jawless fish) Class Thelodonti † Class Anaspida † Class Petromyzontida or Hyperoartia Petromyzontidae (lampreys) Class...

†Anaspida...

Family †Achanarellidae Newman, 2002 Family †Jamoytiidae White, 1946 Class †Anaspida Janvier, 1996 non Williston, 1917 Order †Endeiolepidiformes Berg, 1940...

forms among the "ostracoderms" (jawless armored "fishes") of the class Anaspida, but this is increasingly considered an artificial arrangement based on...

†Protoconodonta? †Paraconodontida †Conodonta †Ostracoderms †Pteraspidomorphi †Thelodonti †Anaspida †Cephalaspidomorphi †Galeaspida †Pituriaspida †Osteostraci...

†Anaspida...

species took to the water column to be free-swimming organisms. †Anaspida (extinct) Anaspida ('no-shields') is an extinct group of primitive jawless vertebrates...