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Pteraspididae is an
extinct family of
heterostracan vertebrates. It is an
Early Devonian-aged
family that
contains the stereotypical, torpedo-shaped pteraspidids...
- Panamintaspis,
share various features with
these derived pteraspidids.
Pteraspididae is an
Early Devonian-aged
family that
contains the stereotypical, torpedo-shaped...
- five families, four of which, Anchipteraspididae, Gigantaspididae,
Pteraspididae, and
Protaspididae are monophyletic:
Protopteraspididae has recently...
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incertae sedis Palanasaspis Pteraspididae Althaspis Blieckaspis Brachipteraspis Errivaspis Escharaspis Grumantaspis Helaspis Larnovaspis Loricopteraspis...
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Animalia Phylum:
Chordata class:
Pteraspidomorphi Subclass:
Heterostraci Order:
Pteraspidiformes Family:
Pteraspididae Genus:
Rhinopteraspis Jaekel, 1919...
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though while it was
originally described as a
member of the same family,
Pteraspididae, a
recent phylogenetic re****essment of the
order Pteraspidiformes places...
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incertae sedis Palanasaspis Pteraspididae Althaspis Blieckaspis Brachipteraspis Errivaspis Escharaspis Grumantaspis Helaspis Larnovaspis Loricopteraspis...
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gradual transition between the more
advanced Pteraspoidei (comprising
Pteraspididae,
Gigantaspis and Protaspididae), and the
anchipteraspidids and the Psammosteids...
-
Protaspidids were once
thought to
represent a
transitional form
between the
Pteraspididae and the Psammosteida,
bearing the
broad head
shield shape of the latter...
-
define them as pteraspidids. Elliott, D. K. "A new
subfamily of the
Pteraspididae (Agnatha, Heterostraci) from the
upper Silurian and
lower Devonian of...
