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Xenaspis
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Otocerataceae
Family:
Xenodiscidae
Formal Genus Name and Reference:
Xenaspis WAAGEN, 1895
Type Species:
Ceratites carbonarius WAAGEN, 1873
Images
(Click to enlarge in a new window)
Fig. 162,2. *X. carbonarius (Waagen), SaltR., 2 a, b, X0.7, 2 c, x1.5
Synonyms
Geographic Distribution
SaltR.-Himalaya-Madag.-Timor-Tex.
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Like Xenodiscus but no lateral ribs on phragmocone, weak folds or ribs may be present on living chamber
References
Waagen, Wilhelm, 1895, Fossils from the Ceratite Formation: Same, ser. 13, Salt Range Fossils, v. 2, p. 1-323, pl. 1-40.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Otocerataceae
Family:
Xenodiscidae
Formal Genus Name and Reference:
Xenaspis WAAGEN, 1895
Type Species:
Ceratites carbonarius WAAGEN, 1873
Images
(Click to enlarge in a new window)
Fig. 162,2. *X. carbonarius (Waagen), SaltR., 2 a, b, X0.7, 2 c, x1.5
Synonyms
Geographic Distribution
SaltR.-Himalaya-Madag.-Timor-Tex.
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
U.Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Like Xenodiscus but no lateral ribs on phragmocone, weak folds or ribs may be present on living chamber
References
Waagen, Wilhelm, 1895, Fossils from the Ceratite Formation: Same, ser. 13, Salt Range Fossils, v. 2, p. 1-323, pl. 1-40.