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Angulaticeras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Psilocerataceae
Family:
Schlotheimiidae
Formal Genus Name and Reference:
Angulaticeras QUENSTEDT, 1883
Type Species:
Am. lacunatus J. Buckman, 1844, SD LANGE, 1924 (ICZN Opinion 324)
Images
(Click to enlarge in a new window)
Fig. 260,5. *A. lacunatus (J.Buck.), Eng., 5a-c, x1 (675*), Fig. 261,2. A. densilobata (PomPECKJ) (type of Pseudoschlotheimia), 2 a, b, x0.5 (682*)
Synonyms
Pseudoschlotheimia
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
Sinem.
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
Sinem.
Ending International Stage:
Sinemurian
Fraction Up In Ending Stage:
100
Ending Date:
192.9
Description
Involute, whorls heightening rapidly, ribs numerous, somewhat irregular, fading on adult
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Psilocerataceae
Family:
Schlotheimiidae
Formal Genus Name and Reference:
Angulaticeras QUENSTEDT, 1883
Type Species:
Am. lacunatus J. Buckman, 1844, SD LANGE, 1924 (ICZN Opinion 324)
Images
(Click to enlarge in a new window)
Fig. 260,5. *A. lacunatus (J.Buck.), Eng., 5a-c, x1 (675*), Fig. 261,2. A. densilobata (PomPECKJ) (type of Pseudoschlotheimia), 2 a, b, x0.5 (682*)
Synonyms
Pseudoschlotheimia
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
Sinem.
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
Sinem.
Ending International Stage:
Sinemurian
Fraction Up In Ending Stage:
100
Ending Date:
192.9
Description
Involute, whorls heightening rapidly, ribs numerous, somewhat irregular, fading on adult