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Basilicus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Basilicus MURCHISON, 1839
Type Species:
Asaphus tyrannus MURCHISON, 1839
Images
(Click to enlarge in a new window)
Fig. 248, 3. *B. (B.) tyrannus (Murchison), 3a, ceph., x0.7, 3b, hypostoma, x1, 3c, pyg., showing at right shape of inner margin of doublure, x0.7 (466).
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
56.9
Beginning Date:
463.02
Ending Stage in Treatise Usage:
Llandeil.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Only known genus of Asaphinae with marginal position of facial suture in front of glabella. Cephalon surrounded by convex rim; glabella long; preglabellar field narrow; eyes rather large, situated slightly behind transverse mid-line of cranidium; genal angles with spines. Lateral margin of the hypostoma broadly rounded, posterior margin deeply notched. Pygidium with well-defined concave border; inner part of the pygidial pleural fields with strong, rounded ribs; pygidial doublure moderately broad, as in Asaphus.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Uncertain
Family:
Asaphidae
Formal Genus Name and Reference:
Basilicus MURCHISON, 1839
Type Species:
Asaphus tyrannus MURCHISON, 1839
Images
(Click to enlarge in a new window)
Fig. 248, 3. *B. (B.) tyrannus (Murchison), 3a, ceph., x0.7, 3b, hypostoma, x1, 3c, pyg., showing at right shape of inner margin of doublure, x0.7 (466).
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
56.9
Beginning Date:
463.02
Ending Stage in Treatise Usage:
Llandeil.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Only known genus of Asaphinae with marginal position of facial suture in front of glabella. Cephalon surrounded by convex rim; glabella long; preglabellar field narrow; eyes rather large, situated slightly behind transverse mid-line of cranidium; genal angles with spines. Lateral margin of the hypostoma broadly rounded, posterior margin deeply notched. Pygidium with well-defined concave border; inner part of the pygidial pleural fields with strong, rounded ribs; pygidial doublure moderately broad, as in Asaphus.