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Centrifugus
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Macluritina
Superfamily:
Euomphalacea
Family:
Euomphaladae
Formal Genus Name and Reference:
Centrifugus BRONN, 1834
Type Species:
C. planorbis
Images
(Click to enlarge in a new window)
Fig. 107,2. *C. planorbis, Gotl., 2a,b, oblique from above and below, X0.7.
Synonyms
Inachus, Hisingeria
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
U.Sil.
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Shell with nearly flat spire, widest at carina around base, with short narrow slit and selenizone not far from upper suture, 5 strong spiral cords above peripheral carina with weaker cord between each pair, spiral ornament on base faint. [Slit on upper whorl surface probably is exhalant opening.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Macluritina
Superfamily:
Euomphalacea
Family:
Euomphaladae
Formal Genus Name and Reference:
Centrifugus BRONN, 1834
Type Species:
C. planorbis
Images
(Click to enlarge in a new window)
Fig. 107,2. *C. planorbis, Gotl., 2a,b, oblique from above and below, X0.7.
Synonyms
Inachus, Hisingeria
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
U.Sil.
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
U.Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Shell with nearly flat spire, widest at carina around base, with short narrow slit and selenizone not far from upper suture, 5 strong spiral cords above peripheral carina with weaker cord between each pair, spiral ornament on base faint. [Slit on upper whorl surface probably is exhalant opening.]