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Monotypic taxon:
Subclass †
Astraspida
Berg, 1940
(fish)
Taxa
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Entity:
†Pteraspidomorpha (Class)
..†Arandaspida (Subclass)
..†Heterostraci (Subclass)
..†Astraspida (Subclass)
....†Astraspidiformes (Order)
Basic information
Distribution
:
Nearctic/North America
Status
:
fossil
Paleontology
Period
:
Late Ordovician
Ref:
M.J. Benton, 2005
: 47.
Geography
Geographic region
:
North America
©2004-2025 Universal Taxonomic Services
Last updated:
21 Sep 2025