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Icriodella
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Icriodontidae
Formal Genus Name and Reference:
Icriodella RHODES, 1953a, p. 285
Type Species:
I. superba, OD
Images
(Click to enlarge in a new window)
FIG. 74,l. *I. superba, M.Ord.(Lexington Ls.), USA (Ky.) ; la-c. Pa element, lat., upper, lower views, X33; Id,e, M element, lat. views, X82; If-g, Pb element, upper and lat. views, X26; 1h, S element with 2 denticulate processes, lat. view, X47; Ii,j, S element with 3 denticulate processes, lat. and post.upper views, X47 (Bergstrom & Sweet, 1966).
Synonyms
Rhynchognathodus; Sagittodontis
Geographic Distribution
N.Am.-Eu
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Dev. (Famenn.)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Apparatus probably pentamembrate, including lamellar elements. Pa elements pastinoscaphate with long anterior process bearing double row of denticles, short cusp, short adenticulate lateral process, and bladelike posterior process with one row of confluent denticles. Pb elements tertiopedate, more or less pyramidal, with short cusp and adenticulate or weakly denticulate processes. M elements bipennate or dolabrate, flaring laterally, with adenticulate posterior process and weakly denticulate anterior process. S elements tertiopedate, subpyramidal ; of two types, one with 3 denticulate processes, the other similar but with anterior process adenticulate. Basal cavity large in all elements, especially in P elements.
References
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Icriodontidae
Formal Genus Name and Reference:
Icriodella RHODES, 1953a, p. 285
Type Species:
I. superba, OD
Images
(Click to enlarge in a new window)
FIG. 74,l. *I. superba, M.Ord.(Lexington Ls.), USA (Ky.) ; la-c. Pa element, lat., upper, lower views, X33; Id,e, M element, lat. views, X82; If-g, Pb element, upper and lat. views, X26; 1h, S element with 2 denticulate processes, lat. view, X47; Ii,j, S element with 3 denticulate processes, lat. and post.upper views, X47 (Bergstrom & Sweet, 1966).
Synonyms
Rhynchognathodus; Sagittodontis
Geographic Distribution
N.Am.-Eu
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Dev. (Famenn.)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Apparatus probably pentamembrate, including lamellar elements. Pa elements pastinoscaphate with long anterior process bearing double row of denticles, short cusp, short adenticulate lateral process, and bladelike posterior process with one row of confluent denticles. Pb elements tertiopedate, more or less pyramidal, with short cusp and adenticulate or weakly denticulate processes. M elements bipennate or dolabrate, flaring laterally, with adenticulate posterior process and weakly denticulate anterior process. S elements tertiopedate, subpyramidal ; of two types, one with 3 denticulate processes, the other similar but with anterior process adenticulate. Basal cavity large in all elements, especially in P elements.