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Acodus
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Conodontophorida - SuperFamily Unknown
Family:
SuperFamily Unknown - Family Unknown
Formal Genus Name and Reference:
Acodus PANDER, 1856, p. 21
Type Species:
A. erectus, SD Ulrich & BASSLER, 1926, p. 7
Images
(Click to enlarge in a new window)
Fig. 118, 8 . A. acutus Pander, L.Ord. (Pakerort Stage, ?Varangu Mbr.), Eu. (Baltic), 8 a, b, lat. views, 8 c, cross section of cusp, magnification unknown (Pander, 1856).
Synonyms
Acontiodus
Geographic Distribution
Eu.-Asia (Sib.)-?N.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Sil., ?Sil. (Llandov.Wenlock.)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Apparatus unknown, genus based on nongeniculate, coniform elements with slightly recurved cusp, short base, and shallow basal cavity. Cusp somewhat compressed laterally with anterior and posterior edges, one lateral face with prominent central carina, other face evenly convex. [Estonian specimens identified as A. erectus have recently been illustrated by VIIRA (l975, fig. 17a, 17b). They appear to be the first new specimens of this species figured since PANDER's time. As noted by SWEET & BERGSTROM (1972), data from Estonia (VIIRA, 1966) suggest that elements of A. erectus are associated with, and have the same range as, those of Acontiodus latus PANDER, 1856, type species of Acontiodus. Accordingly, it is possible that all these elements were components of the same apparatus and Acodus and Acontiodus are synonyms; see also LINDSTROM (l973).]
References
Pander, C. H., 1856, Monographie der fossilen Fische des silurischen Systems der russischbaltischen Gouvernements: Akad. Wiss., St. Petersburg, 91 p., 1 text-fig., 7 pl .
Museum or Author Information
Classification
Phylum:
Conodonta
Class:
Conodonta
Order:
Conodontophorida
Superfamily:
Conodontophorida - SuperFamily Unknown
Family:
SuperFamily Unknown - Family Unknown
Formal Genus Name and Reference:
Acodus PANDER, 1856, p. 21
Type Species:
A. erectus, SD Ulrich & BASSLER, 1926, p. 7
Images
(Click to enlarge in a new window)
Fig. 118, 8 . A. acutus Pander, L.Ord. (Pakerort Stage, ?Varangu Mbr.), Eu. (Baltic), 8 a, b, lat. views, 8 c, cross section of cusp, magnification unknown (Pander, 1856).
Synonyms
Acontiodus
Geographic Distribution
Eu.-Asia (Sib.)-?N.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Sil., ?Sil. (Llandov.Wenlock.)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Apparatus unknown, genus based on nongeniculate, coniform elements with slightly recurved cusp, short base, and shallow basal cavity. Cusp somewhat compressed laterally with anterior and posterior edges, one lateral face with prominent central carina, other face evenly convex. [Estonian specimens identified as A. erectus have recently been illustrated by VIIRA (l975, fig. 17a, 17b). They appear to be the first new specimens of this species figured since PANDER's time. As noted by SWEET & BERGSTROM (1972), data from Estonia (VIIRA, 1966) suggest that elements of A. erectus are associated with, and have the same range as, those of Acontiodus latus PANDER, 1856, type species of Acontiodus. Accordingly, it is possible that all these elements were components of the same apparatus and Acodus and Acontiodus are synonyms; see also LINDSTROM (l973).]
References
Pander, C. H., 1856, Monographie der fossilen Fische des silurischen Systems der russischbaltischen Gouvernements: Akad. Wiss., St. Petersburg, 91 p., 1 text-fig., 7 pl .