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Siemiradzkia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Pseudoperisphinctinae
Formal Genus Name and Reference:
Siemiradzkia HYATT, 1900
Type Species:
Am. aurigerus OPPEL, 1857 (ICZN Opinion 301)
Images
(Click to enlarge in a new window)
Fig. 405, 13. *S. aurigera (Oppel), Fr., x0.7 (330*)
Synonyms
Geographic Distribution
Eu.-N. Afr.-Madag.-Persia-Pamirs-Mex.
Age Range
Beginning Stage in Treatise Usage:
M.Jur. (Bath.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
M.Jur. (Bath.)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small, with fine, sharp, irregular ribbing which becomes modified on venter of body chamber, aperture with large lappets. Parabolae, no constrictions.
References
Hyatt, Alpheus, 1900, Cephalopoda: in Zittel, K. A., Textbook of Palaeontology, 1st English ed., transl. Eastman, C. R., p. 502-592, fig. 1049-1235.
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Perisphinctidae
Subfamily:
Pseudoperisphinctinae
Formal Genus Name and Reference:
Siemiradzkia HYATT, 1900
Type Species:
Am. aurigerus OPPEL, 1857 (ICZN Opinion 301)
Images
(Click to enlarge in a new window)
Fig. 405, 13. *S. aurigera (Oppel), Fr., x0.7 (330*)
Synonyms
Geographic Distribution
Eu.-N. Afr.-Madag.-Persia-Pamirs-Mex.
Age Range
Beginning Stage in Treatise Usage:
M.Jur. (Bath.)
Beginning International Stage:
Bathonian
Fraction Up In Beginning Stage:
0
Beginning Date:
168.17
Ending Stage in Treatise Usage:
M.Jur. (Bath.)
Ending International Stage:
Bathonian
Fraction Up In Ending Stage:
100
Ending Date:
165.29
Description
Small, with fine, sharp, irregular ribbing which becomes modified on venter of body chamber, aperture with large lappets. Parabolae, no constrictions.
References
Hyatt, Alpheus, 1900, Cephalopoda: in Zittel, K. A., Textbook of Palaeontology, 1st English ed., transl. Eastman, C. R., p. 502-592, fig. 1049-1235.