-
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...
-
known vertebrates. The
group represents a
subclass within the
class Pteraspidomorphi, and
contains only one order, the Arandaspidiformes. The
oldest known...
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Hyperoartia (lampreys)
class †Conodonta
class †Myllokunmingiida
class †
Pteraspidomorphi class †Thelodonti
class †Anaspida
class †Cephalaspidomorphi Infraphylum...
- †Conodonts †Protoconodonta? †Paraconodontida †Conodonta †Ostracoderms †
Pteraspidomorphi †Thelodonti †Anaspida †Cephalaspidomorphi †Galeaspida †Pituriaspida...
- scheme, with the
following major groups:
class Myxini (hagfish)
class Pteraspidomorphi † (early
jawless fish)
class Thelodonti †
class Anaspida †
class Petromyzontida...
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ventral webs and an
elongated notochordal lobe.
Astraspis Sacabambaspis "
Pteraspidomorphi".
Retrieved 28
October 2013. Ritchie, Alexander; Gilbert-Tomlinson...
- †Conodonts †Protoconodonta? †Paraconodontida †Conodonta †Ostracoderms †
Pteraspidomorphi †Thelodonti †Anaspida †Cephalaspidomorphi †Galeaspida †Pituriaspida...
-
Ordovician fish" Palaeontology, 40 (3): 625–642.
Michael J. Benton,
Vertebrate Palaeontology, 3rd edition, 2005 Palaeos'
Pteraspidomorphi v t e v t e...
- †Conodonts †Protoconodonta? †Paraconodontida †Conodonta †Ostracoderms †
Pteraspidomorphi †Thelodonti †Anaspida †Cephalaspidomorphi †Galeaspida †Pituriaspida...
