- 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...
- holotype. Elliott,
David K., and
Robert R. Ilyes. "New
Early Devonian pteraspidids (Agnatha, Heterostraci) from
Death Valley National Monument, southeastern...
- strata.
Protopteraspidids were once
thought to
represent a
taxon of
basal pteraspidids (hence "proto") but
recent evaluations demonstrate that Protopteraspididae...
- 63–69. Elliott,
David K., and
Robert R. Ilyes. "New
Early Devonian pteraspidids (Agnatha, Heterostraci) from
Death Valley National Monument, southeastern...
-
protaspidids are
actually highly derived pteraspidids, and that the anchipteraspidids, the most
primitive of
pteraspidids, are the sister-group of the psammosteids...
- shape.
Robert R. Ilyes;
David K.
Elliott (1994). "New
Early Devonian pteraspidids (Agnatha, Heterostraci) from east-central Nevada".
Journal of Paleontology...
-
articulation and
growth patterns of the
plates clearly define them as
pteraspidids. Elliott, D. K. "A new
subfamily of the
Pteraspididae (Agnatha, Heterostraci)...
-
Doryaspis and Panamintaspis,
share various features with
these derived pteraspidids. Pernègre V., 2006. - Un
nouveau pteraspidiforme (Vertebrata, Heterostraci)...
