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Pterospathodus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Pterospathodontidae
Formal Genus Name and Reference:
Pterospathodus WALLISER, 1964, p. 66
Type Species:
P. amorphognathoides, OD
Images
(Click to enlarge in a new window)
FIG. 83,1. ·P. amorphognathoides, up. Llandov.low. Wenlock.(P. amorphognathoides Z., Clarita F.), USA(Okla.); la, Pa element, upper view; lb, Pb element, lat. view; 1c, M element, lat. view; ld, S element, lat. view; X27(Barrisck & Klapper, 1976).
Synonyms
Llandoverygnathus
Geographic Distribution
Eu.-Asia-N.Am.
Age Range
Beginning Stage in Treatise Usage:
Sil. (Llandov.)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Sil. (low.Wenlock)
Ending International Stage:
Sheinwoodian
Fraction Up In Ending Stage:
100
Ending Date:
430.62
Description
Pa element either pastiniscaphate like that of Astropentagnathus but with cavity much more restricted and inner lateral process not well developed, or carminiscaphate with offset lateral lobes at midlength. Pb element either anguliplanate with narrow platform ledges and downward projecting apical lips or angulate with offset lobes of basal cavity. [Reconstruction: WALLISER, 1964; BARRICK & KLAPPER, 1976.]
References
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Pterospathodontidae
Formal Genus Name and Reference:
Pterospathodus WALLISER, 1964, p. 66
Type Species:
P. amorphognathoides, OD
Images
(Click to enlarge in a new window)
FIG. 83,1. ·P. amorphognathoides, up. Llandov.low. Wenlock.(P. amorphognathoides Z., Clarita F.), USA(Okla.); la, Pa element, upper view; lb, Pb element, lat. view; 1c, M element, lat. view; ld, S element, lat. view; X27(Barrisck & Klapper, 1976).
Synonyms
Llandoverygnathus
Geographic Distribution
Eu.-Asia-N.Am.
Age Range
Beginning Stage in Treatise Usage:
Sil. (Llandov.)
Beginning International Stage:
Rhuddanian
Fraction Up In Beginning Stage:
0
Beginning Date:
443.07
Ending Stage in Treatise Usage:
Sil. (low.Wenlock)
Ending International Stage:
Sheinwoodian
Fraction Up In Ending Stage:
100
Ending Date:
430.62
Description
Pa element either pastiniscaphate like that of Astropentagnathus but with cavity much more restricted and inner lateral process not well developed, or carminiscaphate with offset lateral lobes at midlength. Pb element either anguliplanate with narrow platform ledges and downward projecting apical lips or angulate with offset lobes of basal cavity. [Reconstruction: WALLISER, 1964; BARRICK & KLAPPER, 1976.]