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Uralopronorites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Pronoritidae
Subfamily:
Pronoritinae
Formal Genus Name and Reference:
Uralopronorites Librovich in RUZHENTSEV, 1949a, p. 63
Type Species:
U. mirus, OD, =Uralopronorites mirus Librovich in RUZHENTSEV, 1947d, p. 45, nom. nud.
Images
(Click to enlarge in a new window)
Fig. 124, 1a-d. N. carboniferus Ruzhentsev, Gzhelian, Urals, a-b, × 1, c, hypotype, SUI 62485, northern Kazakhstan, Aidaralash, diameter at 31 mm (new, courtesy of D. M. Work & W. B. Saunders), d, diameter at 42 mm (Ruzhentsev, 1949a).--Fig. 124, 1e. N. tenuis (KarpinskiI), hypotype, SUI 84901, Asselian or Sakmarian, Sholak-Say, Southern Urals, diameter at 34 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Uralopronorites
Geographic Distribution
Kazakhstan (Southern Urals), Russia (Urals, Verkhoian), Tajikistan (Pamir), China (Guangxi, Guizhou, Xinjiang, Xizang, Gansu), Indonesia (Timor), Thailand (Loei), USA (Texas), Canada (Ellesmere Island)
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (Gzhelian)
Beginning International Stage:
Gzhelian
Fraction Up In Beginning Stage:
0
Beginning Date:
303.68
Ending Stage in Treatise Usage:
Cisuralian (Kungurian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Pronoritins with shallowly concave venter, characterized by incipient bifurcation of anomalously broad ventral prong of primary external lateral lobe. Sutural formula: (V 2 V 1 V 2 )(L 1 L 1 ) UU 1 U 2 U 4 U 6 U 7 :U 5 U 3 ID [Russian]. Two named species. [Lateral lobe of U. mirus is twice width of ventral lobe and more than three times width of adjacent primary umbilical lobe, both relationships representing extremes for Pronoritidae. Additionally, ventral subdivision of the lateral lobe is threehalves as broad as dorsal subdivision and displays an incipient subdivision on its dorsal flank. In all these respects, suture resembles those of ancestral medlicottiid Prouddenites (Uddenitinae), a genus characteristic of the Virgilian but represented by more primitive forms in the Desmoinesian (chatelain, 1984). On these bases, Uralopronorites may be interpreted as a medlicottiid precursor. Were it not for its undivided dorsal lobe, Uralopronorites could be referred with equal propriety to the Uddenitinae.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Pronoritidae
Subfamily:
Pronoritinae
Formal Genus Name and Reference:
Uralopronorites Librovich in RUZHENTSEV, 1949a, p. 63
Type Species:
U. mirus, OD, =Uralopronorites mirus Librovich in RUZHENTSEV, 1947d, p. 45, nom. nud.
Images
(Click to enlarge in a new window)
Fig. 124, 1a-d. N. carboniferus Ruzhentsev, Gzhelian, Urals, a-b, × 1, c, hypotype, SUI 62485, northern Kazakhstan, Aidaralash, diameter at 31 mm (new, courtesy of D. M. Work & W. B. Saunders), d, diameter at 42 mm (Ruzhentsev, 1949a).--Fig. 124, 1e. N. tenuis (KarpinskiI), hypotype, SUI 84901, Asselian or Sakmarian, Sholak-Say, Southern Urals, diameter at 34 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Uralopronorites
Geographic Distribution
Kazakhstan (Southern Urals), Russia (Urals, Verkhoian), Tajikistan (Pamir), China (Guangxi, Guizhou, Xinjiang, Xizang, Gansu), Indonesia (Timor), Thailand (Loei), USA (Texas), Canada (Ellesmere Island)
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (Gzhelian)
Beginning International Stage:
Gzhelian
Fraction Up In Beginning Stage:
0
Beginning Date:
303.68
Ending Stage in Treatise Usage:
Cisuralian (Kungurian)
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Pronoritins with shallowly concave venter, characterized by incipient bifurcation of anomalously broad ventral prong of primary external lateral lobe. Sutural formula: (V 2 V 1 V 2 )(L 1 L 1 ) UU 1 U 2 U 4 U 6 U 7 :U 5 U 3 ID [Russian]. Two named species. [Lateral lobe of U. mirus is twice width of ventral lobe and more than three times width of adjacent primary umbilical lobe, both relationships representing extremes for Pronoritidae. Additionally, ventral subdivision of the lateral lobe is threehalves as broad as dorsal subdivision and displays an incipient subdivision on its dorsal flank. In all these respects, suture resembles those of ancestral medlicottiid Prouddenites (Uddenitinae), a genus characteristic of the Virgilian but represented by more primitive forms in the Desmoinesian (chatelain, 1984). On these bases, Uralopronorites may be interpreted as a medlicottiid precursor. Were it not for its undivided dorsal lobe, Uralopronorites could be referred with equal propriety to the Uddenitinae.]