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Holcophylloceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Phyllocerataceae
Family:
Phylloceratidae
Formal Genus Name and Reference:
Holcophylloceras SPATH, 1927
Type Species:
Phylloceras mediterraneum Neumayr, 1871 (=Am. zignodianum ORB., 1848)
Images
(Click to enlarge in a new window)
Fig. 220,5. °H. medi- /erraneum (NWM.); 5a-e, X0.5 (667°). --FIG. 220,4. H. gllellardi (RASPAIL), L.Cret.(Apt.), Fr.; type species of Sal/eldiella, 4a,b, X I; 4e, enlarged (329°)
Synonyms
Salfeldiella, Telegdiceras
Geographic Distribution
world-wide
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Baj.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Cret.(Apt) - from L-4 1994 update
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
100
Ending Date:
113.2
Description
Resembles Calliphylloceras but constrictions affect test as well as internal mold and are more acutely sigmoid, linguate, or angular, and outer half of whorl is ribbed. Saddles of sutures diphyllic except Ist lateral saddle, which becomes triphyllic in later forms.
References
Spath, L. F., 1927-33, Revision of the Jurassic cephalopod faunas of Kachh (Cutch): India Geol. Survey Mem., Palaeont. Indica, new ser., v. 9, mem. 2, pts. 1-6, 945 p., 130 pl.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Phyllocerataceae
Family:
Phylloceratidae
Formal Genus Name and Reference:
Holcophylloceras SPATH, 1927
Type Species:
Phylloceras mediterraneum Neumayr, 1871 (=Am. zignodianum ORB., 1848)
Images
(Click to enlarge in a new window)
Fig. 220,5. °H. medi- /erraneum (NWM.); 5a-e, X0.5 (667°). --FIG. 220,4. H. gllellardi (RASPAIL), L.Cret.(Apt.), Fr.; type species of Sal/eldiella, 4a,b, X I; 4e, enlarged (329°)
Synonyms
Salfeldiella, Telegdiceras
Geographic Distribution
world-wide
Age Range
Beginning Stage in Treatise Usage:
M.Jur.(Baj.)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
L.Cret.(Apt) - from L-4 1994 update
Ending International Stage:
Aptian
Fraction Up In Ending Stage:
100
Ending Date:
113.2
Description
Resembles Calliphylloceras but constrictions affect test as well as internal mold and are more acutely sigmoid, linguate, or angular, and outer half of whorl is ribbed. Saddles of sutures diphyllic except Ist lateral saddle, which becomes triphyllic in later forms.
References
Spath, L. F., 1927-33, Revision of the Jurassic cephalopod faunas of Kachh (Cutch): India Geol. Survey Mem., Palaeont. Indica, new ser., v. 9, mem. 2, pts. 1-6, 945 p., 130 pl.