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Cardinia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Cardiniidae
Formal Genus Name and Reference:
Cardinia AGASSIZ, 1841
Type Species:
Unio listeri J. SOWERBY, 1817; SD ICZN, Op. 292
Images
(Click to enlarge in a new window)
Fig. E78,2. C. hybrida (Sowerby), L.Lias., Eng., 2a-c, RV ext., LV int., RV int., X1( Cox, n)
Synonyms
Thalassides, Sinemuria, Cardinea, Pachyodon, Dihora, Thalassites, Storthodon
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
U. Trias. (Carn.)
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
U.Lias. (Toarc.) [Records from Bajocian based on poor material and doubtfully acceptable'
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Medium-sized to large, ovate to cuneiform. Lunule and escutcheon bordered by more or less distinct ridges, steeply inclined, in some forms lying almost in plane of commissure of valves, ligamental nymph thus deeply sunk, although not internal; lunule commonly extending to posterior side of beak. Single weak, radially elongated cardinal tooth (3b) present in RV in some species (but indistinguishable in others), and received in shallow recess in LV. Lateral teeth heavy, LV posterior and RV anterior ones each with tubercle-like ter- mination received in recess between corresponding tooth and dorsal margin of opposite valve. Ornament of concentric ribs or imbrications, or lacking.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Heterodonta
Order:
Veneroida
Superfamily:
Crassatellacea
Family:
Cardiniidae
Formal Genus Name and Reference:
Cardinia AGASSIZ, 1841
Type Species:
Unio listeri J. SOWERBY, 1817; SD ICZN, Op. 292
Images
(Click to enlarge in a new window)
Fig. E78,2. C. hybrida (Sowerby), L.Lias., Eng., 2a-c, RV ext., LV int., RV int., X1( Cox, n)
Synonyms
Thalassides, Sinemuria, Cardinea, Pachyodon, Dihora, Thalassites, Storthodon
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
U. Trias. (Carn.)
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
U.Lias. (Toarc.) [Records from Bajocian based on poor material and doubtfully acceptable'
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Medium-sized to large, ovate to cuneiform. Lunule and escutcheon bordered by more or less distinct ridges, steeply inclined, in some forms lying almost in plane of commissure of valves, ligamental nymph thus deeply sunk, although not internal; lunule commonly extending to posterior side of beak. Single weak, radially elongated cardinal tooth (3b) present in RV in some species (but indistinguishable in others), and received in shallow recess in LV. Lateral teeth heavy, LV posterior and RV anterior ones each with tubercle-like ter- mination received in recess between corresponding tooth and dorsal margin of opposite valve. Ornament of concentric ribs or imbrications, or lacking.