Galeaspida (from Latin, 'Helmet shields') is an extinct taxon of jawless marine and freshwater fish. The name is derived from galea, the Latin word for...

include only groups more clearly related to the Osteostraci, such as Galeaspida and Pituriaspida, that were largely unknown in the 1920s. Some reference...

(conodonts) † Class Cephalaspidomorphi † (early jawless fish) (unranked) Galeaspida † (unranked) Pituriaspida † (unranked) Osteostraci † Infraphylum Gnathostomata...

†Galeaspida...

Galeaspida † "Cephalaspidomorphi" (paraphyletic)...

†Galeaspida...

periods to the present day. †Galeaspida (extinct) Galeaspida ('helmet-shields') have massive bone shield on the head. Galeaspida lived in shallow, fresh water...

all ostracoderms and the gnathostomes. Other ostracoderms, such as the Galeaspida are now known to have a paired olfactory organ. Current phylogenetic analysis...

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

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