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Posidonia
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Posidoniidae
Formal Genus Name and Reference:
Posidonia BRONN, 1828, p. 268
Type Species:
P. becheri
Images
(Click to enlarge in a new window)
Fig. C68,5. ·P. becheri, L.Carb., Gee.; RV ext., Xl (961). [NEWELL]
Synonyms
Geographic Distribution
N. Am.-Eurasia-S. Am.-E. Af
Age Range
Beginning Stage in Treatise Usage:
U.Jur.
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
U.Jur.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Ovate to rhombic shells with concentric undulations, auricles lacking or poorly developed in adults, ovoid shells with umbones submedially situated along short hinge, weakly or not costate, Convergent with or ancestral to certain genera in the Inoceramidae, differing in ligament structure. Some Upper Paleozoic species referred to this genus may belong to Posidoniella or Atomodesma.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Bivalvia
Subclass:
Pteriomorphia
Order:
Pterioida
Suborder:
Pteriina
Superfamily:
Pectinacea (scallops and relatives)
Family:
Posidoniidae
Formal Genus Name and Reference:
Posidonia BRONN, 1828, p. 268
Type Species:
P. becheri
Images
(Click to enlarge in a new window)
Fig. C68,5. ·P. becheri, L.Carb., Gee.; RV ext., Xl (961). [NEWELL]
Synonyms
Geographic Distribution
N. Am.-Eurasia-S. Am.-E. Af
Age Range
Beginning Stage in Treatise Usage:
U.Jur.
Beginning International Stage:
Oxfordian
Fraction Up In Beginning Stage:
0
Beginning Date:
161.53
Ending Stage in Treatise Usage:
U.Jur.
Ending International Stage:
Tithonian
Fraction Up In Ending Stage:
100
Ending Date:
143.1
Description
Ovate to rhombic shells with concentric undulations, auricles lacking or poorly developed in adults, ovoid shells with umbones submedially situated along short hinge, weakly or not costate, Convergent with or ancestral to certain genera in the Inoceramidae, differing in ligament structure. Some Upper Paleozoic species referred to this genus may belong to Posidoniella or Atomodesma.