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Mucrospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Mucrospiriferidae
Formal Genus Name and Reference:
Mucrospirifer GRABAU, 1931a, p. 408
Type Species:
Delthyris mucronatus CONRAD, 1841, p. 54, OD
Images
(Click to enlarge in a new window)
Fig. 1227, 4 a-b. *M. mucronatus (Conrad), Givetian, New York, ventral and dorsal valves, X1 (Cooper, 1944).
Synonyms
Lamellispirifer, Khinganospirifer
Geographic Distribution
Germany, Poland, northeastern China (Heilongjiang Province), eastern North America
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian (Eifelian)
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Medium to large, biconvex, transverse, mucronate, ventral interarea low, curved, apsacline to orthocline, stegidial plates present, fold and sulcus well defined, smooth or with a median groove in fold, flanks with numerous, simple plications, crossed by numerous growth lamellae, some with fila crossed by fine capillae, wedge-shaped umbonal thickening, dental plates short
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Mucrospiriferidae
Formal Genus Name and Reference:
Mucrospirifer GRABAU, 1931a, p. 408
Type Species:
Delthyris mucronatus CONRAD, 1841, p. 54, OD
Images
(Click to enlarge in a new window)
Fig. 1227, 4 a-b. *M. mucronatus (Conrad), Givetian, New York, ventral and dorsal valves, X1 (Cooper, 1944).
Synonyms
Lamellispirifer, Khinganospirifer
Geographic Distribution
Germany, Poland, northeastern China (Heilongjiang Province), eastern North America
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian (Eifelian)
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Medium to large, biconvex, transverse, mucronate, ventral interarea low, curved, apsacline to orthocline, stegidial plates present, fold and sulcus well defined, smooth or with a median groove in fold, flanks with numerous, simple plications, crossed by numerous growth lamellae, some with fila crossed by fine capillae, wedge-shaped umbonal thickening, dental plates short