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Bouleiceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hildoceratidae
Formal Genus Name and Reference:
Bouleiceras THEVENIN, 1906
Type Species:
B. nitescens
Images
(Click to enlarge in a new window)
Synonyms
Geographic Distribution
Port.-C. Arabia-Baluch.-Somali.-NE. Kenya-Madag.
Age Range
Beginning Stage in Treatise Usage:
L.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
L.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
50
Ending Date:
179.45
Description
Nucleus smooth, then a tuberculate stage, followed by strong rursiradiate ribbing somewhat as in Mercaticeras but bifurcating from umbilical edge, and finally a flat-sided smooth stage, all stages with strong keel. Sutures ceratitic, with wide en- tire lateral saddle and long, smooth-sided 1st lat- eral lobe toothed at extremity.
References
Boule, Marcellin, Lemoine, Paul, \& Thevenin, Armand Böse, Emil, 1906-07, Céphalopodes crétacés des environs de Diego-Suarez: Ann. Paléont., tome 1 Böse, Emil, , p. 173-192, pl. 14-20; tome 2 Böse, Emil, , p. 1-56, pl. 1-8 (issued repaged, p. 1-76, pl. 1-15).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hildoceratidae
Formal Genus Name and Reference:
Bouleiceras THEVENIN, 1906
Type Species:
B. nitescens
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
Port.-C. Arabia-Baluch.-Somali.-NE. Kenya-Madag.
Age Range
Beginning Stage in Treatise Usage:
L.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
L.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
50
Ending Date:
179.45
Description
Nucleus smooth, then a tuberculate stage, followed by strong rursiradiate ribbing somewhat as in Mercaticeras but bifurcating from umbilical edge, and finally a flat-sided smooth stage, all stages with strong keel. Sutures ceratitic, with wide en- tire lateral saddle and long, smooth-sided 1st lat- eral lobe toothed at extremity.
References
Boule, Marcellin, Lemoine, Paul, \& Thevenin, Armand Böse, Emil, 1906-07, Céphalopodes crétacés des environs de Diego-Suarez: Ann. Paléont., tome 1 Böse, Emil, , p. 173-192, pl. 14-20; tome 2 Böse, Emil, , p. 1-56, pl. 1-8 (issued repaged, p. 1-76, pl. 1-15).