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Xaniognathus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Gondolellacea
Family:
Xaniognathidae
Formal Genus Name and Reference:
Xaniognathus SWEET, 1970, p. 261
Type Species:
X. curvatus, OD
Images
(Click to enlarge in a new window)
FIG. 104,2. OX. Curvatus, L.Trias., Asia(Pak.); 2a, Sa element, lat. view, × 86, 2b, posteriorly incomplete Sc element, lat. view, × 78, 2c, Sb element, post. view, × 64, 2d, Pb element, oblique outer view, × 97, 2e, Pa element, lat. view, × 119, 2f, M element, lat. view, × 119 2f, M element, post. view, X 97 (Sweet, n).
Synonyms
Geographic Distribution
Asia, Eu., N.Am.
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
L.Trias.
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
100
Ending Date:
246.7
Description
Apparatus seximembrate: Pa carminate or angulate, with long, longitudinally ribbed anterior process and very short fragile, unribbed posterior process, Pb digyrate, bowed out, with one long and one very short lateral process, M digyrate, Sa alate, with long denticulate posterior process and cusp longer than any denticle of posterior series, Sb digyrate, arched, Sc bipennate, arched, with anterior process that may bifurcate distally.
References
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Gondolellacea
Family:
Xaniognathidae
Formal Genus Name and Reference:
Xaniognathus SWEET, 1970, p. 261
Type Species:
X. curvatus, OD
Images
(Click to enlarge in a new window)
FIG. 104,2. OX. Curvatus, L.Trias., Asia(Pak.); 2a, Sa element, lat. view, × 86, 2b, posteriorly incomplete Sc element, lat. view, × 78, 2c, Sb element, post. view, × 64, 2d, Pb element, oblique outer view, × 97, 2e, Pa element, lat. view, × 119, 2f, M element, lat. view, × 119 2f, M element, post. view, X 97 (Sweet, n).
Synonyms
Geographic Distribution
Asia, Eu., N.Am.
Age Range
Beginning Stage in Treatise Usage:
U.Perm.
Beginning International Stage:
Wuchiapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
259.55
Ending Stage in Treatise Usage:
L.Trias.
Ending International Stage:
Olenekian
Fraction Up In Ending Stage:
100
Ending Date:
246.7
Description
Apparatus seximembrate: Pa carminate or angulate, with long, longitudinally ribbed anterior process and very short fragile, unribbed posterior process, Pb digyrate, bowed out, with one long and one very short lateral process, M digyrate, Sa alate, with long denticulate posterior process and cusp longer than any denticle of posterior series, Sb digyrate, arched, Sc bipennate, arched, with anterior process that may bifurcate distally.