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Prionolobus
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ceratitida
Superfamily:
Noritaceae
Family:
Gyronitidae
Formal Genus Name and Reference:
Prionolobus WAAGEN, 1895
Type Species:
P. atavus
Images
(Click to enlarge in a new window)
Fig. 167,3. P. impressus (Waagen), Gyronitan, SaltR., * (548*)
Synonyms
Geographic Distribution
SaltR. - Himalaya-Timor-Madag.-Mont.-Nev.
Age Range
Beginning Stage in Treatise Usage:
Scyth.(U.Gyronitan)
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
46.2
Beginning Date:
250.97
Ending Stage in Treatise Usage:
Scyth.(L.Flemingitan)
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
48.9
Ending Date:
248.32
Description
Discoidal, with rounded or tabulate venter and tendency toward involution. Suture as in Gyronites.
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:
Noritaceae
Family:
Gyronitidae
Formal Genus Name and Reference:
Prionolobus WAAGEN, 1895
Type Species:
P. atavus
Images
(Click to enlarge in a new window)
Fig. 167,3. P. impressus (Waagen), Gyronitan, SaltR., * (548*)
Synonyms
Geographic Distribution
SaltR. - Himalaya-Timor-Madag.-Mont.-Nev.
Age Range
Beginning Stage in Treatise Usage:
Scyth.(U.Gyronitan)
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
46.2
Beginning Date:
250.97
Ending Stage in Treatise Usage:
Scyth.(L.Flemingitan)
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
48.9
Ending Date:
248.32
Description
Discoidal, with rounded or tabulate venter and tendency toward involution. Suture as in Gyronites.
References
Waagen, Wilhelm, 1895, Fossils from the Ceratite Formation: Same, ser. 13, Salt Range Fossils, v. 2, p. 1-323, pl. 1-40.