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Neognathodus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Polygnathacea
Family:
Idiognathodontidae
Formal Genus Name and Reference:
Neognathodus DUNN, 1970, p. 336
Type Species:
Polygnathus bassleri Harris & HOLLINGSWORTH, 1933, p. 198
Images
(Click to enlarge in a new window)
Fig. 109, 1. *N. bassleri (Harris & Hollingsworth), L.Penn., USA (Okla.), la-c, Pa element, lat., upper, and lower views, X40 (Dunn, 1970)
Synonyms
Geographic Distribution
N.Am., U.Carb. (Namur.-Westphal.), Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Penn.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
L.Perm., U.Carb. (Namur.-Westphal.)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Apparatus unknown, probably either sexior septimembrate. Pectiniform element scaphate with long free blade up to half length of element meeting platform centrally or subcentrally; platform in some reduced or absent on outer margin; parapets or transverse ridges flanking one or both sides of platform; carina extending to, or near, posterior tip of element; adcarinal grooves deep; basal cavity large, deep, asymmetrical.
References
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Polygnathacea
Family:
Idiognathodontidae
Formal Genus Name and Reference:
Neognathodus DUNN, 1970, p. 336
Type Species:
Polygnathus bassleri Harris & HOLLINGSWORTH, 1933, p. 198
Images
(Click to enlarge in a new window)
Fig. 109, 1. *N. bassleri (Harris & Hollingsworth), L.Penn., USA (Okla.), la-c, Pa element, lat., upper, and lower views, X40 (Dunn, 1970)
Synonyms
Geographic Distribution
N.Am., U.Carb. (Namur.-Westphal.), Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Penn.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
L.Perm., U.Carb. (Namur.-Westphal.)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Apparatus unknown, probably either sexior septimembrate. Pectiniform element scaphate with long free blade up to half length of element meeting platform centrally or subcentrally; platform in some reduced or absent on outer margin; parapets or transverse ridges flanking one or both sides of platform; carina extending to, or near, posterior tip of element; adcarinal grooves deep; basal cavity large, deep, asymmetrical.