-
Pteraspidomorphi is an
extinct class of
early jawless fish. They have long been
regarded as
closely related or even
ancestral to
jawed vertebrates, but...
- are
currently grouped with
arandaspids and
astraspids in the
clade Pteraspidomorphi (Gagnier 1993, 1995;
Donoghue &
Smith 2001;
Sansom et al. 2005), in...
- gnathostomes), and hagfish. The
group represents a
subclass within the
class Pteraspidomorphi, and
contains only one order, the Arandaspidiformes. The
oldest known...
-
Hyperoartia (lampreys)
class †Conodonta
class †Myllokunmingiida
class †
Pteraspidomorphi class †Thelodonti
class †Anaspida
class †Cephalaspidomorphi Infraphylum...
- scheme, with the
following major groups:
class Myxini (hagfish)
class Pteraspidomorphi † (early
jawless fish)
class Thelodonti †
class Anaspida †
class Petromyzontida...
-
ventral webs and an
elongated notochordal lobe.
Astraspis Sacabambaspis "
Pteraspidomorphi".
Retrieved 28
October 2013. Ritchie, Alexander; Gilbert-Tomlinson...
- mya) that
belonged to the
phylum Chordata,
infraphylum Agnatha,
class Pteraspidomorphi, and the
subclass Heterostraci.
Drepanaspis are ****umed to have lived...
- †
Pteraspidomorphi †Thelodonti...
- †Myllokunmingiida †Metaspriggina? †Haikouellidae †Conodonta
Ostracodermi †
Pteraspidomorphi †Thelodontomorphi †Thelodonti †Anaspidomorphi †Cephalaspidomorphi Cyclostomi...
- toothed, funnel-like
sucking mouth. The
extinct Pteraspidomorphi,
ancestral to
jawed vertebrates Pteraspidomorphi is an
extinct class of
early jawless fish...
