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Pycnomphalus
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Trochina
Superfamily:
Anomphalacea
Family:
Anomphalidae
Formal Genus Name and Reference:
Pycnomphalus LINDSTRÖM, 1884
Type Species:
P. obesus
Images
(Click to enlarge in a new window)
Fig. 156,8. *P. obesus, M.Sil., Gotl., X2.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Sil.
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Rotelliform, with numerous whorls and very thick shell, bearing within the umbilicus shelf-like funicle generated by massive thickening at base of columella
References
Lindström, Gustaf, 1884, On the Silurian Gastropoda and Pteropoda of Gotland: Kongl. Svenska Veten-skaps-Akad., Handl., v. 19, no. 6, p. 1-250, pl. 1-21 (Stockholm).
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Trochina
Superfamily:
Anomphalacea
Family:
Anomphalidae
Formal Genus Name and Reference:
Pycnomphalus LINDSTRÖM, 1884
Type Species:
P. obesus
Images
(Click to enlarge in a new window)
Fig. 156,8. *P. obesus, M.Sil., Gotl., X2.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
Sil.
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Rotelliform, with numerous whorls and very thick shell, bearing within the umbilicus shelf-like funicle generated by massive thickening at base of columella
References
Lindström, Gustaf, 1884, On the Silurian Gastropoda and Pteropoda of Gotland: Kongl. Svenska Veten-skaps-Akad., Handl., v. 19, no. 6, p. 1-250, pl. 1-21 (Stockholm).