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Protathyris
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Athyridoidea
Family:
Athyrididae
Formal Genus Name and Reference:
Protathyris KOZLOWSKI, 1929, p. 223
Type Species:
P. praecursor, SD GRABAU, 1932b, p. 90
Images
(Click to enlarge in a new window)
Fig. 1018, 4a-g. *P. praecursor, Lochkovian, Podolia, Russia, $a-c$, neotype, dorsal, ventral, and lateral views, CNIGR 125/11475, x2$, d, enlargement of ornament of
Synonyms
Geographic Distribution
North America, Europe, Asia, Australia
Age Range
Beginning Stage in Treatise Usage:
Silurian (?Wenlock, Ludlow)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Similar to Greenfieldia externally and to Athyris internally, but shell wall thin, dental plates thin and very short, cardinal plate triangular, delicate, trilobed anteriorly, the central lobe being the largest and most concave, dorsal foramen large, cardinal flanges absent, dorsal myophragm may be present.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Athyridoidea
Family:
Athyrididae
Formal Genus Name and Reference:
Protathyris KOZLOWSKI, 1929, p. 223
Type Species:
P. praecursor, SD GRABAU, 1932b, p. 90
Images
(Click to enlarge in a new window)
Fig. 1018, 4a-g. *P. praecursor, Lochkovian, Podolia, Russia, $a-c$, neotype, dorsal, ventral, and lateral views, CNIGR 125/11475, x2$, d, enlargement of ornament of
Synonyms
Geographic Distribution
North America, Europe, Asia, Australia
Age Range
Beginning Stage in Treatise Usage:
Silurian (?Wenlock, Ludlow)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Similar to Greenfieldia externally and to Athyris internally, but shell wall thin, dental plates thin and very short, cardinal plate triangular, delicate, trilobed anteriorly, the central lobe being the largest and most concave, dorsal foramen large, cardinal flanges absent, dorsal myophragm may be present.