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Phyllopachyceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Phyllocerataceae
Family:
Phylloceratidae
Formal Genus Name and Reference:
Phyllopachyceras SPATH, 1925
Type Species:
Ammonites infundibulum D'ORBIGNY, 1841
Images
(Click to enlarge in a new window)
Fig. 218,2a,b. *. infundibulum (Оrв.), Barrem, Fr., * (329*), Fig. 218,2c. P. rouyanum (Orb.), L. Cret.(Apt.), Fr., * (329*)
Synonyms
Geographic Distribution
Eu.-N.Afr.-S.India-W.Austral.-N.Z.-Japan-Greenl.
Age Range
Beginning Stage in Treatise Usage:
L.Cret.(Barrem.)
Beginning International Stage:
Barremian
Fraction Up In Beginning Stage:
0
Beginning Date:
126.5
Ending Stage in Treatise Usage:
U.Cret.(Maastr.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Moderately to very involute, inflated, widest point usually at mid-side with flat slope to a minute umbilicus. Smooth to a varying diameter with strong rounded ribs on outer part of whorl. Sutures with 1st and 2nd lateral saddles tetraphyllic.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Phyllocerataceae
Family:
Phylloceratidae
Formal Genus Name and Reference:
Phyllopachyceras SPATH, 1925
Type Species:
Ammonites infundibulum D'ORBIGNY, 1841
Images
(Click to enlarge in a new window)
Fig. 218,2a,b. *. infundibulum (Оrв.), Barrem, Fr., * (329*), Fig. 218,2c. P. rouyanum (Orb.), L. Cret.(Apt.), Fr., * (329*)
Synonyms
Geographic Distribution
Eu.-N.Afr.-S.India-W.Austral.-N.Z.-Japan-Greenl.
Age Range
Beginning Stage in Treatise Usage:
L.Cret.(Barrem.)
Beginning International Stage:
Barremian
Fraction Up In Beginning Stage:
0
Beginning Date:
126.5
Ending Stage in Treatise Usage:
U.Cret.(Maastr.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
Moderately to very involute, inflated, widest point usually at mid-side with flat slope to a minute umbilicus. Smooth to a varying diameter with strong rounded ribs on outer part of whorl. Sutures with 1st and 2nd lateral saddles tetraphyllic.