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Diceratocephalus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Diceratocephalidae
Formal Genus Name and Reference:
Diceratocephalus Lu, 1954
Type Species:
D. armatus
Images
(Click to enlarge in a new window)
Fig. 405, 2. "'D. armatus; cran., X2 (406n).
Synonyms
Geographic Distribution
S.Manch.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
100
Ending Date:
486.85
Description
Characters of family. = Anterior corners of cranidium with prominent spines, as long as main part of cranidium, and curving almost to meet in front; glabella tapering forward; occipital ring with long, mesial spine; fixigenae about as wide as glabella; eyes small, opposite posterior half of glabella; librigenae narrow, with long genal spines. Pygidium wider than long, with poorly defined axial furrows, and with ridge parallel to posterior margin, separating wide border with terrace lines from remainder of pygidium.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Diceratocephalidae
Formal Genus Name and Reference:
Diceratocephalus Lu, 1954
Type Species:
D. armatus
Images
(Click to enlarge in a new window)
Fig. 405, 2. "'D. armatus; cran., X2 (406n).
Synonyms
Geographic Distribution
S.Manch.
Age Range
Beginning Stage in Treatise Usage:
Upper Cambrian
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
Upper Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
100
Ending Date:
486.85
Description
Characters of family. = Anterior corners of cranidium with prominent spines, as long as main part of cranidium, and curving almost to meet in front; glabella tapering forward; occipital ring with long, mesial spine; fixigenae about as wide as glabella; eyes small, opposite posterior half of glabella; librigenae narrow, with long genal spines. Pygidium wider than long, with poorly defined axial furrows, and with ridge parallel to posterior margin, separating wide border with terrace lines from remainder of pygidium.