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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...
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include only
groups more
clearly related to the Osteostraci, such as
Galeaspida and Pituriaspida, that were
largely unknown in the 1920s. Some reference...
- †
Galeaspida...
- (conodonts) †
class Cephalaspidomorphi † (early
jawless fish) (unranked)
Galeaspida † (unranked)
Pituriaspida † (unranked)
Osteostraci †
Infraphylum Gnathostomata...
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Galeaspida † "Cephalaspidomorphi" (paraphyletic)...
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periods to the
present day. †
Galeaspida (extinct)
Galeaspida ('helmet-shields') have m****ive 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...
- †Protoconodonta? †Paraconodontida †Conodonta †Ostracoderms †Pteraspidomorphi †Thelodonti †Anaspida †Cephalaspidomorphi †
Galeaspida †Pituriaspida †Osteostraci...
