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Pachycardia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Pachycardiidae
Formal Genus Name and Reference:
Pachycardia HAUER, 1857
Type Species:
P. rugosa, OD
Images
(Click to enlarge in a new window)
Fig. D59,3. *P. rugosa, U.Trias.(Carn.), 3a,b, Yugo., LV ext., LV int., X1 (950), 3c, S.Tyrol, RV int., X1 (Broili, 1904)
Synonyms
Pacycyardia
Geographic Distribution
Eu.(S.Alps-Balkans)
Age Range
Beginning Stage in Treatise Usage:
M.Trias.
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Medium-sized, cuneiform, strongly inequilateral, well inflated, some specimens subrostrate and weakly carinate posteriorly, umbones prominent, well incurved, strongly prosogyrous, lunule wide, cordiform, distinctly bordered, no escutcheon, ligament external. LV with stout, triangular main cardinal tooth separated by broad recess from weaker, variable anterior cardinal close to lunular margin; and with elongate posterior lateral which is parallel to margin and projects rather prominently near its posterior end; RV with stout, variable, commonly grooved, anteriorly placed cardinal and elongate posterior lateral which extends to below beak and is received in recess above lateral of other valve. Surface smooth. [Brackish-water or marine.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Palaeoheterodonta
Order:
Unionoida (Freshwater mussels and relatives)
Superfamily:
Unionacea (freshwater mussels)
Family:
Pachycardiidae
Formal Genus Name and Reference:
Pachycardia HAUER, 1857
Type Species:
P. rugosa, OD
Images
(Click to enlarge in a new window)
Fig. D59,3. *P. rugosa, U.Trias.(Carn.), 3a,b, Yugo., LV ext., LV int., X1 (950), 3c, S.Tyrol, RV int., X1 (Broili, 1904)
Synonyms
Pacycyardia
Geographic Distribution
Eu.(S.Alps-Balkans)
Age Range
Beginning Stage in Treatise Usage:
M.Trias.
Beginning International Stage:
Anisian
Fraction Up In Beginning Stage:
0
Beginning Date:
246.7
Ending Stage in Treatise Usage:
U.Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Medium-sized, cuneiform, strongly inequilateral, well inflated, some specimens subrostrate and weakly carinate posteriorly, umbones prominent, well incurved, strongly prosogyrous, lunule wide, cordiform, distinctly bordered, no escutcheon, ligament external. LV with stout, triangular main cardinal tooth separated by broad recess from weaker, variable anterior cardinal close to lunular margin; and with elongate posterior lateral which is parallel to margin and projects rather prominently near its posterior end; RV with stout, variable, commonly grooved, anteriorly placed cardinal and elongate posterior lateral which extends to below beak and is received in recess above lateral of other valve. Surface smooth. [Brackish-water or marine.]