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Frechites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Ceratitaceae
Family:
Ceratitidae
Formal Genus Name and Reference:
Frechites SMITH, 1932
Type Species:
Ceratites humboldtensis Hyatt & SMITH, 1905
Images
(Click to enlarge in a new window)
Fig. 185,2. *F. humboldtensis (HYATT-S.), Nev.; 2a,b, X0.66; 2e, X1.5 (449°)
Synonyms
Geographic Distribution
Nev.-B.C.
Age Range
Beginning Stage in Treatise Usage:
Anis.
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Anis.
Ending International Stage:
Anisian
Fraction Up In Ending Stage:
100
Ending Date:
241.46
Description
Like Gymnotoceras but with tuberculation on ventral shoulders and at point of bifurcation of ribs, keel faint or absent
References
Smith, J. P., 1932, Lower Triassic ammonites of North America: U. S. Geol. Survey, Prof. Paper 167, p. 1-199, pl. 1-81.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Ceratitaceae
Family:
Ceratitidae
Formal Genus Name and Reference:
Frechites SMITH, 1932
Type Species:
Ceratites humboldtensis Hyatt & SMITH, 1905
Images
(Click to enlarge in a new window)
Fig. 185,2. *F. humboldtensis (HYATT-S.), Nev.; 2a,b, X0.66; 2e, X1.5 (449°)
Synonyms
Geographic Distribution
Nev.-B.C.
Age Range
Beginning Stage in Treatise Usage:
Anis.
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
Anis.
Ending International Stage:
Anisian
Fraction Up In Ending Stage:
100
Ending Date:
241.46
Description
Like Gymnotoceras but with tuberculation on ventral shoulders and at point of bifurcation of ribs, keel faint or absent
References
Smith, J. P., 1932, Lower Triassic ammonites of North America: U. S. Geol. Survey, Prof. Paper 167, p. 1-199, pl. 1-81.