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Icriodus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Icriodontidae
Formal Genus Name and Reference:
Icriodus Branson & MEHL, 1938, p. 159
Type Species:
I. expansus, OD
Images
(Click to enlarge in a new window)
Fig. 74, 4a, b. *I. expansis, disputed M.Dev.-U.Dev. boundary interval (Schmidtognathus hermanni-Polygnathus cristatus Z., Rapid Mbr., Cedar Valley Ls.), USA (Iowa), Pa element, upper and lower views, X37 (Klapper, n), Fig. 74, 4 c-e. I. steinachensis Al-Rawi, L.Dev. (McMonnigal Ls.), USA (Nev.), 4c, Pa element, upper view, 4 d, e, Pb} element, inner lat. and outer lat. views, X37 (Klapper & Philip, 1971)
Synonyms
Acodina; Latericriodus; Caudicriodus; Praelatericriodus
Geographic Distribution
Eu.-N. Afr.-Asia-N. Am.-Aus-tralia
Age Range
Beginning Stage in Treatise Usage:
Sil.(Pridol.)
Beginning International Stage:
Pridoli
Fraction Up In Beginning Stage:
0
Beginning Date:
422.73
Ending Stage in Treatise Usage:
U.Dev. (Famenn.)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Main process of P a element characteristically consisting of three longitudinal rows of nodes but including forms with transverse ridges, denticulate lateral processes developed near posterior end in some. P b element nongeniculate, laterally compressed coniform element with sharp anterior and posterior keels. S elements relatively smooth, simple cones of circular to elliptical cross section. [Reconstruction: KLAPPER & PHILIP, 1971; modified herein.]
References
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Prioniodontacea
Family:
Icriodontidae
Formal Genus Name and Reference:
Icriodus Branson & MEHL, 1938, p. 159
Type Species:
I. expansus, OD
Images
(Click to enlarge in a new window)
Fig. 74, 4a, b. *I. expansis, disputed M.Dev.-U.Dev. boundary interval (Schmidtognathus hermanni-Polygnathus cristatus Z., Rapid Mbr., Cedar Valley Ls.), USA (Iowa), Pa element, upper and lower views, X37 (Klapper, n), Fig. 74, 4 c-e. I. steinachensis Al-Rawi, L.Dev. (McMonnigal Ls.), USA (Nev.), 4c, Pa element, upper view, 4 d, e, Pb} element, inner lat. and outer lat. views, X37 (Klapper & Philip, 1971)
Synonyms
Acodina; Latericriodus; Caudicriodus; Praelatericriodus
Geographic Distribution
Eu.-N. Afr.-Asia-N. Am.-Aus-tralia
Age Range
Beginning Stage in Treatise Usage:
Sil.(Pridol.)
Beginning International Stage:
Pridoli
Fraction Up In Beginning Stage:
0
Beginning Date:
422.73
Ending Stage in Treatise Usage:
U.Dev. (Famenn.)
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Main process of P a element characteristically consisting of three longitudinal rows of nodes but including forms with transverse ridges, denticulate lateral processes developed near posterior end in some. P b element nongeniculate, laterally compressed coniform element with sharp anterior and posterior keels. S elements relatively smooth, simple cones of circular to elliptical cross section. [Reconstruction: KLAPPER & PHILIP, 1971; modified herein.]