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Astraspida, or astraspids, are a
small group of
extinct armored jawless vertebrates,
which lived in the Late
Ordovician (about 450
million years ago) in...
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Astraspida Eriptychiida Heterostraci see below↓...
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Sansom et al., 2013
Genus †Sacabambaspis Gagnier,
Blieck & Rodrico, 1986
Astraspida Heterostraci Janvier,
Philippe (1997)
Arandaspida The Tree of Life Web...
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lived in
fresh water. The
taxon contains the
subgroups Heterostraci,
Astraspida, Arandaspida. †Thelodonti (extinct)
Thelodonti ('feeble-teeth') are a...
- Goodrich, 1909 Type
species Pteraspis rostrata Ag****iz, 1835
Subgroups †Anatolepis †Arandaspida †Heterostracomorphi †
Astraspida †Eriptychiida †Heterostraci...
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Astraspida Eriptychiida Heterostraci see below↓...
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lived in
fresh water. The
taxon contains the
subgroups Heterostraci,
Astraspida, Arandaspida. †Thelodonti (extinct)
Thelodonti (nipple teeth) are a group...
-
Astraspida Eriptychiida Heterostraci see below↓...
- Kingdom:
Animalia Phylum:
Chordata class:
Pteraspidomorphi Subclass:
Astraspida Order:
Tesakoviaspidida Family:
Tesakoviaspididae Genus: Tesakoviaspis...
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Astraspida Eriptychiida Heterostraci see below↓...
