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Tornquistia
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Chonetoidea
Family:
Anopliidae
Formal Genus Name and Reference:
Tornquistia PAECKELMANN, 1930, p. 227
Type Species:
Leptaena (Chonetes) polita M'COV, 1855, p. 427, OD
Images
(Click to enlarge in a new window)
Fig. 249, 7a-c. *T. polita (M'Cor), Lower Carboniferous, Scotland, $a, b$, ventral valves showing spine row, $X_{4}$, c, slab with four dorsal valve interiors, ventral valve cast, x4$ (Paeckelmann, 1930)."
Synonyms
Paeckelmannia
Geographic Distribution
Great Britain, Ireland, France, Spain, Germany, Thailand
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian
Beginning International Stage:
Frasnian
Fraction Up In Beginning Stage:
0
Beginning Date:
378.9
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Very small to small, highly concavoconvex medianly, greatest width along hinge line with well-differentiated ears, shell surface smooth, pseudocapillate when decorticated, few growth lines, spines orthomorph oblique, symmetrically arranged, ventral interior with long, narrow septum, dorsal interior with short, ill-defined anderidia anteriorly divergent at 40° to 50°, pair of long, narrow accessory septa anteriorly divergent at 25° to 35°, median septum absent or reduced to short anteriorly placed median ridge, inner socket ridges short, straight, narrow, cardinal process small, anteriorly bounded by cardinal process pit
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Productida
Superfamily:
Chonetoidea
Family:
Anopliidae
Formal Genus Name and Reference:
Tornquistia PAECKELMANN, 1930, p. 227
Type Species:
Leptaena (Chonetes) polita M'COV, 1855, p. 427, OD
Images
(Click to enlarge in a new window)
Fig. 249, 7a-c. *T. polita (M'Cor), Lower Carboniferous, Scotland, $a, b$, ventral valves showing spine row, $X_{4}$, c, slab with four dorsal valve interiors, ventral valve cast, x4$ (Paeckelmann, 1930)."
Synonyms
Paeckelmannia
Geographic Distribution
Great Britain, Ireland, France, Spain, Germany, Thailand
Age Range
Beginning Stage in Treatise Usage:
Upper Devonian
Beginning International Stage:
Frasnian
Fraction Up In Beginning Stage:
0
Beginning Date:
378.9
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Very small to small, highly concavoconvex medianly, greatest width along hinge line with well-differentiated ears, shell surface smooth, pseudocapillate when decorticated, few growth lines, spines orthomorph oblique, symmetrically arranged, ventral interior with long, narrow septum, dorsal interior with short, ill-defined anderidia anteriorly divergent at 40° to 50°, pair of long, narrow accessory septa anteriorly divergent at 25° to 35°, median septum absent or reduced to short anteriorly placed median ridge, inner socket ridges short, straight, narrow, cardinal process small, anteriorly bounded by cardinal process pit