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Puzosia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Desmoceratidae
Formal Genus Name and Reference:
Puzosia BAYLE, 1878, pl. 45, 46 (explanations)
Type Species:
Ammonites planulatus J. de C. Sowerby, 1827b, p. 136, SD H. DOUVILLÉ, 1879, p. 91
Images
(Click to enlarge in a new window)
FIG. 55,1a– c. P. (P.) planulata (J. de C. S OWERBY ), Cenomanian, Germany; a,b, nucleus of macroconch, ×0.75; c, ×0.5 (Schlüter, 1871–1876).——FIG. 55,1d. ?P. (P.) tamon (MATSUMOTO, KAWASHITA, & TAKAHASHI in MATSUMOTO), macroconch, Lower Albian, Japan; ×0.2 (Matsumoto, 1988).
Synonyms
Pleuropachydiscus, ?Puzosiella
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (?Upper Aptian, Lower Albian)
Beginning International Stage:
Aptian
Fraction Up In Beginning Stage:
66
Beginning Date:
115.99
Ending Stage in Treatise Usage:
Upper Cretaceous (Upper Campanian)
Ending International Stage:
Campanian
Fraction Up In Ending Stage:
50
Ending Date:
77.91
Description
Macroconchs large but only microconchs and nuclei known of most species. Whorl section round to compressed; fine ribs and constrictions, parallel to the ribs, generally present. In general more evolute than Melchiorites, with more linguiform projection of constrictions on venter and more complex suture with more strongly retracted suspensive lobe.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Desmocerataceae
Family:
Desmoceratidae
Formal Genus Name and Reference:
Puzosia BAYLE, 1878, pl. 45, 46 (explanations)
Type Species:
Ammonites planulatus J. de C. Sowerby, 1827b, p. 136, SD H. DOUVILLÉ, 1879, p. 91
Images
(Click to enlarge in a new window)
FIG. 55,1a– c. P. (P.) planulata (J. de C. S OWERBY ), Cenomanian, Germany; a,b, nucleus of macroconch, ×0.75; c, ×0.5 (Schlüter, 1871–1876).——FIG. 55,1d. ?P. (P.) tamon (MATSUMOTO, KAWASHITA, & TAKAHASHI in MATSUMOTO), macroconch, Lower Albian, Japan; ×0.2 (Matsumoto, 1988).
Synonyms
Pleuropachydiscus, ?Puzosiella
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (?Upper Aptian, Lower Albian)
Beginning International Stage:
Aptian
Fraction Up In Beginning Stage:
66
Beginning Date:
115.99
Ending Stage in Treatise Usage:
Upper Cretaceous (Upper Campanian)
Ending International Stage:
Campanian
Fraction Up In Ending Stage:
50
Ending Date:
77.91
Description
Macroconchs large but only microconchs and nuclei known of most species. Whorl section round to compressed; fine ribs and constrictions, parallel to the ribs, generally present. In general more evolute than Melchiorites, with more linguiform projection of constrictions on venter and more complex suture with more strongly retracted suspensive lobe.