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Acidaspis
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Odontopleurida
Superfamily:
Dalmanitacea
Family:
Odontopleuridae
Formal Genus Name and Reference:
Acidaspis Murchison, 1839,
Type Species:
A. brightii
Images
(Click to enlarge in a new window)
Fig. 398, 5. *A. brightii, M.Sil., Eng., Sa-c, ceph., dorsal, anterior, right lateral, x1 (496*, 1956).
Synonyms
Pseudomonaspis
Geographic Distribution
Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Dev.
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Glabella tapering forward from basal lateral lobes, with 3 pairs of lateral lobes, occipital ring with lateral lobes, inflated and prolonged backward into thick, long median spine, eye lobes close to posterior border and situated at about half-width of genal regions, eye lobes and sutural ridges prominent, lateral cephalic border spines directed vertically, librigenal spines thick, long. Thorax with 10 segments, posterior pleural bands strongly convex, inflated at fulcra. Pygidium with 7 pairs of border spines, 5th thicker and more elongate than others. Surface tuberculate. M.Ord.-M.Dev., Eu.-N.Am.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Odontopleurida
Superfamily:
Dalmanitacea
Family:
Odontopleuridae
Formal Genus Name and Reference:
Acidaspis Murchison, 1839,
Type Species:
A. brightii
Images
(Click to enlarge in a new window)
Fig. 398, 5. *A. brightii, M.Sil., Eng., Sa-c, ceph., dorsal, anterior, right lateral, x1 (496*, 1956).
Synonyms
Pseudomonaspis
Geographic Distribution
Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Dev.
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Glabella tapering forward from basal lateral lobes, with 3 pairs of lateral lobes, occipital ring with lateral lobes, inflated and prolonged backward into thick, long median spine, eye lobes close to posterior border and situated at about half-width of genal regions, eye lobes and sutural ridges prominent, lateral cephalic border spines directed vertically, librigenal spines thick, long. Thorax with 10 segments, posterior pleural bands strongly convex, inflated at fulcra. Pygidium with 7 pairs of border spines, 5th thicker and more elongate than others. Surface tuberculate. M.Ord.-M.Dev., Eu.-N.Am.