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Bienvillia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Olenidea
Formal Genus Name and Reference:
Bienvillia CLARK, 1924
Type Species:
Dikelocephalus? corax BILLINGS, 1865
Images
(Click to enlarge in a new window)
Fig. 197, 1. *B. corax (Billings), Que., ceph., x5 ( 445 n )
Synonyms
Diatemnus
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
U. Cam.
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cranidium uniformly convex; glabella broadly conical to subquadrate, about 0.8 of length of cranidium, lateral furrows distinct to obsolete; small occipital node; convex preglabellar field; eye ridges faint, small eyes opposite anterior 0.3 of glabella; fixigenae downs[oping, with palpebral areas not more than 0.25 of glabellar width, posterior areas triangular, broad, short (tr.); librigenae elongate triangular with bluntly pointed genal angles. Pygidium unknown. Surface smooth.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Olenacea
Family:
Olenidea
Formal Genus Name and Reference:
Bienvillia CLARK, 1924
Type Species:
Dikelocephalus? corax BILLINGS, 1865
Images
(Click to enlarge in a new window)
Fig. 197, 1. *B. corax (Billings), Que., ceph., x5 ( 445 n )
Synonyms
Diatemnus
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
U. Cam.
Beginning International Stage:
Guzhangian
Fraction Up In Beginning Stage:
50
Beginning Date:
498.75
Ending Stage in Treatise Usage:
L.Ord.
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cranidium uniformly convex; glabella broadly conical to subquadrate, about 0.8 of length of cranidium, lateral furrows distinct to obsolete; small occipital node; convex preglabellar field; eye ridges faint, small eyes opposite anterior 0.3 of glabella; fixigenae downs[oping, with palpebral areas not more than 0.25 of glabellar width, posterior areas triangular, broad, short (tr.); librigenae elongate triangular with bluntly pointed genal angles. Pygidium unknown. Surface smooth.