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Holcorhynchia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Norelloidea
Family:
Norellidae
Formal Genus Name and Reference:
Holcorhynchia BUCKMAN, 1918, p. 28
Type Species:
Rhynchonella standishensis BUCKMAN, 1901, p. 245, OD
Images
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Synonyms
Holochorhynchia
Geographic Distribution
England, Portugal, Italy, Germany, ? Austria, Anatolia, Algeria, ? Sinemurian, Pliensbachian–Toarcian; ?Siberia, ?Bathonian
Age Range
Beginning Stage in Treatise Usage:
Lower Jurassic (?Sinemurian, Pliensbachian)
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
ower Jurassic (Toarcian), Middle Jurassic (?Bathonian)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small, subcircular to subtriangular, depressed ventribiconvex, posteriorly sulcate, subcarinate ventrally with costae numerous, fine, blunt anteriorly after long smooth stage, beak small, hypothyrid slightly incurved. Persistent dorsal median septum, septalium deep, hinge plates inclined dorsally, arcuiform crura rather than raduliform.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Norelloidea
Family:
Norellidae
Formal Genus Name and Reference:
Holcorhynchia BUCKMAN, 1918, p. 28
Type Species:
Rhynchonella standishensis BUCKMAN, 1901, p. 245, OD
Images
(Click to enlarge in a new window)Synonyms
Holochorhynchia
Geographic Distribution
England, Portugal, Italy, Germany, ? Austria, Anatolia, Algeria, ? Sinemurian, Pliensbachian–Toarcian; ?Siberia, ?Bathonian
Age Range
Beginning Stage in Treatise Usage:
Lower Jurassic (?Sinemurian, Pliensbachian)
Beginning International Stage:
Sinemurian
Fraction Up In Beginning Stage:
0
Beginning Date:
199.46
Ending Stage in Treatise Usage:
ower Jurassic (Toarcian), Middle Jurassic (?Bathonian)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small, subcircular to subtriangular, depressed ventribiconvex, posteriorly sulcate, subcarinate ventrally with costae numerous, fine, blunt anteriorly after long smooth stage, beak small, hypothyrid slightly incurved. Persistent dorsal median septum, septalium deep, hinge plates inclined dorsally, arcuiform crura rather than raduliform.