- Devonian-aged
family that
contains the stereotypical, torpedo-shaped
pteraspidids, such as the type genus, Pteraspis, and its
close relatives Errivaspis...
-
series of
plates diagnostic of
pteraspidids, and the
growth habits of
anchipteraspidids are
diagnostic of
pteraspidids, and not of cyathaspidids. The...
- Athenaegis), is
regarded as
being a
sister group of the
Cyathaspids and
Pteraspidids,
while the
Early Devonian Lepidaspis is
regarded as
being incertae sedis...
-
Rhinopteraspis is an
extinct genus of
pteraspidid heterostracan agnathan. "Rhinopteraspis
cornubica (McCoy), with
notes on the
classification and evolution...
- holotype. Elliott,
David K., and
Robert R. Ilyes. "New
Early Devonian pteraspidids (Agnatha, Heterostraci) from
Death Valley National Monument, southeastern...
-
Protaspis is an
extinct genus of
pteraspidid heterostracan agnathan which lived during the
Early Devonian of the
United States, with
fossils found in...
- strata.
Protopteraspidids were once
thought to
represent a
taxon of
basal pteraspidids (hence "proto") but
recent evaluations demonstrate that Protopteraspididae...
-
protaspidids are
actually highly derived pteraspidids, and that the anchipteraspidids, the most
primitive of
pteraspidids, are the sister-group of the psammosteids...
-
articulation and
growth patterns of the
plates clearly define them as
pteraspidids. Elliott, D. K. "A new
subfamily of the
Pteraspididae (Agnatha, Heterostraci)...
-
place the
tolypelepids as a
sister group to the
cyathaspids and the
pteraspidids (and both groups'
daughter taxa). A
recent study by
Lundgren and Blom...
