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Adetognathus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Polygnathacea
Family:
Cavusgnathidae
Formal Genus Name and Reference:
Adetognathus LANE, 1967, p. 931
Type Species:
Cauusgnathus latus GUNNELL, 1933, p. 286, OD
Images
(Click to enlarge in a new window)
FIG. 108,4a. ·A. lautus (GUNNELL), L.Perm., USA(Okla.); Pa element, upper view, X40 (Dunn, 1970).--FIG. 108,4b. A. giganttls (GuNNELL), L.Penn., USA(Texas) ; Pa element, lat. view, X40 (Dunn, 1970).
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb. (low.Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Carb. (low.Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
33
Ending Date:
341.32
Description
Apparatus seximembrate: Pa element scaphate; Pb angulate; M dolabrate; Sa alate, with posterior process; Se bipennate, of two types. [Presence of denticulate posterior process in Sa elements of Missourian age distinguishes them from homologous elements in Ozarkodina. The Pb element can be distinguished from other homologous elements of Missourian age because it is less arched and has fewer but relatively larger denticles. M elements are distinguished from other homologous elements of Missourian age by the outward curvature of the anterolateral process, which differs from those of specimens of both Ozarkodina and Idiognathodus. One of the Se elements is distinguished from homologous elements of Ozarkodina and Idiognathodus by strong downward deflection of the larger anterolateral process. In homologous dements of Adetognatlllls, dements mayor may not have slight downward deflection of the anterolateral process. The second Sc element is distinguished by strong inward curvature of the posterior process, in contrast to presence or absence of slight inward curvature in other forms. The anterolateral process of the first Sc dement may have a slight downward deflection, whereas the corresponding process in the second Sc dement does not. The Sa element is distinguished from homologous dements in species of Ozarkodina of Missourian age by the presence of a denticulate posterior process. Apparatus reconstruction: BAESEMANN, 1973.]
References
Lane, H. R., 1967, Uppermost Mississippian and Lower Pennsylvanian conodonts from the type Morrowan region, Arkansas: J. Paleontol., v. 41, p. 920-942, 2 text-fig., pl. 119-123.
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Polygnathacea
Family:
Cavusgnathidae
Formal Genus Name and Reference:
Adetognathus LANE, 1967, p. 931
Type Species:
Cauusgnathus latus GUNNELL, 1933, p. 286, OD
Images
(Click to enlarge in a new window)
FIG. 108,4a. ·A. lautus (GUNNELL), L.Perm., USA(Okla.); Pa element, upper view, X40 (Dunn, 1970).--FIG. 108,4b. A. giganttls (GuNNELL), L.Penn., USA(Texas) ; Pa element, lat. view, X40 (Dunn, 1970).
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb. (low.Visean)
Beginning International Stage:
Visean
Fraction Up In Beginning Stage:
0
Beginning Date:
346.73
Ending Stage in Treatise Usage:
L.Carb. (low.Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
33
Ending Date:
341.32
Description
Apparatus seximembrate: Pa element scaphate; Pb angulate; M dolabrate; Sa alate, with posterior process; Se bipennate, of two types. [Presence of denticulate posterior process in Sa elements of Missourian age distinguishes them from homologous elements in Ozarkodina. The Pb element can be distinguished from other homologous elements of Missourian age because it is less arched and has fewer but relatively larger denticles. M elements are distinguished from other homologous elements of Missourian age by the outward curvature of the anterolateral process, which differs from those of specimens of both Ozarkodina and Idiognathodus. One of the Se elements is distinguished from homologous elements of Ozarkodina and Idiognathodus by strong downward deflection of the larger anterolateral process. In homologous dements of Adetognatlllls, dements mayor may not have slight downward deflection of the anterolateral process. The second Sc element is distinguished by strong inward curvature of the posterior process, in contrast to presence or absence of slight inward curvature in other forms. The anterolateral process of the first Sc dement may have a slight downward deflection, whereas the corresponding process in the second Sc dement does not. The Sa element is distinguished from homologous dements in species of Ozarkodina of Missourian age by the presence of a denticulate posterior process. Apparatus reconstruction: BAESEMANN, 1973.]
References
Lane, H. R., 1967, Uppermost Mississippian and Lower Pennsylvanian conodonts from the type Morrowan region, Arkansas: J. Paleontol., v. 41, p. 920-942, 2 text-fig., pl. 119-123.