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Nucleata
Classification
Phylum:
Class:
None
Superfamily:
Dyscolioidea
Family:
Nucleatidae
Formal Genus Name and Reference:
Nucleata QUENSTEDT, 1868 in 1868-1871, p. 25
Type Species:
N. collina, OD, =Terebratulites nucleatus von SCHLOTHEIM, 1820, p. 281
Images
(Click to enlarge in a new window)
Fig. 1423, 5a-o. *N. nucleata (Schlotheim), White Jura, Bavaria, Germany, a-b, dorsal and anterior views of silicified specimen, X2, c, ventral valve with loop exposed, X2 (Cooper, 1983), d-0, serial transverse sections, 1.2, 1.7, 2.2, 2.5, 2.9, 3.5, 4.1, 4.4, 4.7, 4.9, 5.3, 5.7 ~mm from first section, X1 (Barczyk, 1969).
Synonyms
Glossothyris, Vjalovithyris
Geographic Distribution
Indonesia (Sula Islands)
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bathonian), Upper Jurassic (Oxfordian)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
Upper Cretaceous (Cenomanian)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Small to medium, subrounded to subpentagonal in outline, ventribiconvex or planoconvex, anterior commissure unisulcate, beak short, truncated by small to medium foramen, beak ridges obscure, no symphytium, cardinal process small, short crural bases expanding directly into crural processes and curving into wide transverse band of very short, wide, rounded loop
References
Museum or Author Information
Classification
Phylum:
Class:
None
Superfamily:
Dyscolioidea
Family:
Nucleatidae
Formal Genus Name and Reference:
Nucleata QUENSTEDT, 1868 in 1868-1871, p. 25
Type Species:
N. collina, OD, =Terebratulites nucleatus von SCHLOTHEIM, 1820, p. 281
Images
(Click to enlarge in a new window)
Fig. 1423, 5a-o. *N. nucleata (Schlotheim), White Jura, Bavaria, Germany, a-b, dorsal and anterior views of silicified specimen, X2, c, ventral valve with loop exposed, X2 (Cooper, 1983), d-0, serial transverse sections, 1.2, 1.7, 2.2, 2.5, 2.9, 3.5, 4.1, 4.4, 4.7, 4.9, 5.3, 5.7 ~mm from first section, X1 (Barczyk, 1969).
Synonyms
Glossothyris, Vjalovithyris
Geographic Distribution
Indonesia (Sula Islands)
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bathonian), Upper Jurassic (Oxfordian)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
Upper Cretaceous (Cenomanian)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Small to medium, subrounded to subpentagonal in outline, ventribiconvex or planoconvex, anterior commissure unisulcate, beak short, truncated by small to medium foramen, beak ridges obscure, no symphytium, cardinal process small, short crural bases expanding directly into crural processes and curving into wide transverse band of very short, wide, rounded loop