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Lapeirousia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Hippuritoida (rudists and relatives)
Superfamily:
Hippuritacea (rudists)
Family:
Radiolitidae
Subfamily:
Lapeirousiinae
Formal Genus Name and Reference:
Lapeirousia BAYLE, 1878, p. 110
Type Species:
Sphaerulites jouanneti des MOULINS, 1827, p. 246, M
Images
(Click to enlarge in a new window)
Fig. E272,3. *L. jouanneti (des Moulins), U.Maastricht., France (Charente), 3 a, b, side view and FV ext., X0.33 (911). [Also Fig. E266,2.]
Synonyms
Geographic Distribution
Eu.-Asia-N.Afr.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Santon.)
Beginning International Stage:
Santonian
Fraction Up In Beginning Stage:
0
Beginning Date:
85.7
Ending Stage in Treatise Usage:
U. Cret.(Maastricht.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
AV cylindrical to depressed convex, wall thick, pseudopillars well developed, bulge into shell cavity, externally siphonal bands indented, shell ribbed, ligamental ridge absent. FV operculiform, flat or convex, internally with 2 oscules
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Hippuritoida (rudists and relatives)
Superfamily:
Hippuritacea (rudists)
Family:
Radiolitidae
Subfamily:
Lapeirousiinae
Formal Genus Name and Reference:
Lapeirousia BAYLE, 1878, p. 110
Type Species:
Sphaerulites jouanneti des MOULINS, 1827, p. 246, M
Images
(Click to enlarge in a new window)
Fig. E272,3. *L. jouanneti (des Moulins), U.Maastricht., France (Charente), 3 a, b, side view and FV ext., X0.33 (911). [Also Fig. E266,2.]
Synonyms
Geographic Distribution
Eu.-Asia-N.Afr.
Age Range
Beginning Stage in Treatise Usage:
U.Cret.(Santon.)
Beginning International Stage:
Santonian
Fraction Up In Beginning Stage:
0
Beginning Date:
85.7
Ending Stage in Treatise Usage:
U. Cret.(Maastricht.)
Ending International Stage:
Maastrichtian
Fraction Up In Ending Stage:
100
Ending Date:
66.04
Description
AV cylindrical to depressed convex, wall thick, pseudopillars well developed, bulge into shell cavity, externally siphonal bands indented, shell ribbed, ligamental ridge absent. FV operculiform, flat or convex, internally with 2 oscules