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Planammatoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hammatoceratidae
Formal Genus Name and Reference:
Planammatoceras BUCKMAN, 1922
Type Species:
P. planiforme
Images
(Click to enlarge in a new window)
Fig. 308, 2a. *P. planiforme, Eng., x0.3 (595*), Fig. 308,2b. P. obtectum (Buck.) (type of Parammatoceras), x0.3 (595*)
Synonyms
Parammatoceras
Geographic Distribution
Eu.-Tangan.-?Persia-Japan-S.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Baj.(murchisonae z.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Baj.(murchisonae z.)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
45
Ending Date:
169.67
Description
Ribbing with distinct lengthened primaries, some flared on inner whorls, but no tubercles, ribbing fades toward aperture, which is sigmoid.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hammatoceratidae
Formal Genus Name and Reference:
Planammatoceras BUCKMAN, 1922
Type Species:
P. planiforme
Images
(Click to enlarge in a new window)
Fig. 308, 2a. *P. planiforme, Eng., x0.3 (595*), Fig. 308,2b. P. obtectum (Buck.) (type of Parammatoceras), x0.3 (595*)
Synonyms
Parammatoceras
Geographic Distribution
Eu.-Tangan.-?Persia-Japan-S.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Baj.(murchisonae z.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Baj.(murchisonae z.)
Ending International Stage:
Bajocian
Fraction Up In Ending Stage:
45
Ending Date:
169.67
Description
Ribbing with distinct lengthened primaries, some flared on inner whorls, but no tubercles, ribbing fades toward aperture, which is sigmoid.