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Hedinaspis
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Papyriaspididae
Formal Genus Name and Reference:
Hedinaspis Troedsson, 1952 [(pro Hedinia Troedsson, 1937 (non Navás, 1936))
Type Species:
Hedinia regalis TROEDSSON, 1937
Images
(Click to enlarge in a new window)
Fig. 196, 5. *H. regalis (Troedsson), E. T'ien-shan, 5a, ceph., x1.4, 5 b, pyg. and part of thorax, x2 (301).
Synonyms
Geographic Distribution
Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Differs from Papyriaspis in having wider cephalon, less tapering glabella, occipital and all glabellar furrows separated from axial furrows, shorter preglabellar field, wider posterior areas of fixigenae, palpebral lobes situated slightly anterior to glabellar center. Thorax of about 24 segments, with narrower, less tapering axis and short, backward-directed pleural spines. Pygidium very small, with faintly indicated axial rings, wide, shallow indentation behind axis, and subreniform outline.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Papyriaspididae
Formal Genus Name and Reference:
Hedinaspis Troedsson, 1952 [(pro Hedinia Troedsson, 1937 (non Navás, 1936))
Type Species:
Hedinia regalis TROEDSSON, 1937
Images
(Click to enlarge in a new window)
Fig. 196, 5. *H. regalis (Troedsson), E. T'ien-shan, 5a, ceph., x1.4, 5 b, pyg. and part of thorax, x2 (301).
Synonyms
Geographic Distribution
Asia
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
0
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Differs from Papyriaspis in having wider cephalon, less tapering glabella, occipital and all glabellar furrows separated from axial furrows, shorter preglabellar field, wider posterior areas of fixigenae, palpebral lobes situated slightly anterior to glabellar center. Thorax of about 24 segments, with narrower, less tapering axis and short, backward-directed pleural spines. Pygidium very small, with faintly indicated axial rings, wide, shallow indentation behind axis, and subreniform outline.