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Cambridium
Classification
Phylum:
Mollusca
Class:
Monoplacophora
Order:
Cambridiodea
Superfamily:
Cambridiacea
Family:
Cambridiidae
Formal Genus Name and Reference:
Cambridium HOUNF́, 1957
Type Species:
C. nikiforovae
Images
(Click to enlarge in a new window)
Fig. 50,6. *C. nikiforovae, Sib.; 6a,b, dorsal and right side views of steinkern showing internal markings, X2.
Synonyms
Geographic Distribution
N.Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (1960 version => now Epoch 2)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam.
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
40
Ending Date:
512.3
Description
Shell symmetrical to asymmetrical, aperture suboval, interior of dorsum with 2 sharp longitudinal ridges, end ridges and furrows curving outward from median part of these ridges; numerous finer ridges and furrows near edges of margin, and essentially normal to margin.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Monoplacophora
Order:
Cambridiodea
Superfamily:
Cambridiacea
Family:
Cambridiidae
Formal Genus Name and Reference:
Cambridium HOUNF́, 1957
Type Species:
C. nikiforovae
Images
(Click to enlarge in a new window)
Fig. 50,6. *C. nikiforovae, Sib.; 6a,b, dorsal and right side views of steinkern showing internal markings, X2.
Synonyms
Geographic Distribution
N.Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (1960 version => now Epoch 2)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam.
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
40
Ending Date:
512.3
Description
Shell symmetrical to asymmetrical, aperture suboval, interior of dorsum with 2 sharp longitudinal ridges, end ridges and furrows curving outward from median part of these ridges; numerous finer ridges and furrows near edges of margin, and essentially normal to margin.