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Phymatoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hammatoceratidae
Formal Genus Name and Reference:
Phymatoceras HYATT, 1867
Type Species:
P. robustum HYATT, (young of Am. tirolensis DUMORTIER, 1874, non HAUER)
Images
(Click to enlarge in a new window)
Fig. 302,1a-c. ·P. robustum HYATT, Fr.; X0.3 (614). - Fig. 302,ld,e. P. binodala (BucK.) (type of CharIronia); X0.7 (595')
Synonyms
Lillia, Loryella, Denckmannia
Geographic Distribution
Eu.-N.Afr.- Anatolia· Japan. -S.Alaska-Chi
Age Range
Beginning Stage in Treatise Usage:
U.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
50
Beginning Date:
179.45
Ending Stage in Treatise Usage:
U.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Evolute planulates with flat to carinate-bisulcate venter and more or less sigmoid ribs, many twinned or triploid from tubercles on umbilical edge.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hammatoceratidae
Formal Genus Name and Reference:
Phymatoceras HYATT, 1867
Type Species:
P. robustum HYATT, (young of Am. tirolensis DUMORTIER, 1874, non HAUER)
Images
(Click to enlarge in a new window)
Fig. 302,1a-c. ·P. robustum HYATT, Fr.; X0.3 (614). - Fig. 302,ld,e. P. binodala (BucK.) (type of CharIronia); X0.7 (595')
Synonyms
Lillia, Loryella, Denckmannia
Geographic Distribution
Eu.-N.Afr.- Anatolia· Japan. -S.Alaska-Chi
Age Range
Beginning Stage in Treatise Usage:
U.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
50
Beginning Date:
179.45
Ending Stage in Treatise Usage:
U.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Evolute planulates with flat to carinate-bisulcate venter and more or less sigmoid ribs, many twinned or triploid from tubercles on umbilical edge.