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Artinskia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Medlicottiidae
Subfamily:
Medlicottiinae
Formal Genus Name and Reference:
Artinskia KARPINSKII, 1926, p. 8
Type Species:
Goniatites Artiensis GRÜNEWALDT, 1860, p. 138, OD
Images
(Click to enlarge in a new window)
Fig. 129, 2a-f. * A. artiensis (GrÜNEWALDT), Artinskian, Southern Urals, a-b, X 1 (Miller, Furnish, & Schindewolf, 1957, as A. falx), c-e, X 0.67 (Ruzhentsev, 1956b), f, diameter at 40 mm (Miller & Furnish, 1940a, as A. falx).-Fig. 129, 2g. A. nalivkini Ruzhentsev, hypotype, SUI 84905, Asselian, Southern Urals, Sholak-Say, diameter at 45 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Promedlicottia; Prosicanites
Geographic Distribution
Kazakhstan (Southern Urals), Tajikistan (Pamir), Russia (Urals, northern Verkhoian), ?southern China (Guangxi), Thailand (Loei), Japan (Kitakami Massif), Indonesia (Timor), USA (Texas, New Mexico), Austria (Carnic Alps)
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (Gzhelian Virgilian)
Beginning International Stage:
Gzhelian
Fraction Up In Beginning Stage:
0
Beginning Date:
303.68
Ending Stage in Treatise Usage:
Cisuralian (Artinskian)
Ending International Stage:
Artinskian
Fraction Up In Ending Stage:
100
Ending Date:
283.3
Description
Ancestral medlicottiins with subdivision of ventrolateral saddle intermediate in degree between characteristic Medlicottiinae and Propinacoceratinae, and conch resembling Sicanitinae. Conch thinly discoidal, with grooved venter between two rows of prominent ventrolateral nodes bounded by less-conspicuous ribs on ventrolateral flanks. Suture resembles Medlicottia, but ventrolateral saddle broader and lower, with 6–8 subdivisions (commonly 2 ventrad, 2 or 3 in crest, 3 dorsad). Sutural formula: (V2 V1 V2 )v1 v2 s1 s1 l3 l2 l1 L1(d) ) UU1 U2 U3 U5 ..... [Russian]. Thirteen named species (most indeterminate). [Complex subdivision of the ventrolateral saddle in rare Gzhelian representatives from the Urals initiated lineages that diversified in the early Permian (Asselian), were rare in the succeeding Sakmarian, but then diversified again in the Artinskian to extend through the late Permian and eventual extinction of the order in the Early Triassic (Induan).]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Medlicottiidae
Subfamily:
Medlicottiinae
Formal Genus Name and Reference:
Artinskia KARPINSKII, 1926, p. 8
Type Species:
Goniatites Artiensis GRÜNEWALDT, 1860, p. 138, OD
Images
(Click to enlarge in a new window)
Fig. 129, 2a-f. * A. artiensis (GrÜNEWALDT), Artinskian, Southern Urals, a-b, X 1 (Miller, Furnish, & Schindewolf, 1957, as A. falx), c-e, X 0.67 (Ruzhentsev, 1956b), f, diameter at 40 mm (Miller & Furnish, 1940a, as A. falx).-Fig. 129, 2g. A. nalivkini Ruzhentsev, hypotype, SUI 84905, Asselian, Southern Urals, Sholak-Say, diameter at 45 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Promedlicottia; Prosicanites
Geographic Distribution
Kazakhstan (Southern Urals), Tajikistan (Pamir), Russia (Urals, northern Verkhoian), ?southern China (Guangxi), Thailand (Loei), Japan (Kitakami Massif), Indonesia (Timor), USA (Texas, New Mexico), Austria (Carnic Alps)
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (Gzhelian Virgilian)
Beginning International Stage:
Gzhelian
Fraction Up In Beginning Stage:
0
Beginning Date:
303.68
Ending Stage in Treatise Usage:
Cisuralian (Artinskian)
Ending International Stage:
Artinskian
Fraction Up In Ending Stage:
100
Ending Date:
283.3
Description
Ancestral medlicottiins with subdivision of ventrolateral saddle intermediate in degree between characteristic Medlicottiinae and Propinacoceratinae, and conch resembling Sicanitinae. Conch thinly discoidal, with grooved venter between two rows of prominent ventrolateral nodes bounded by less-conspicuous ribs on ventrolateral flanks. Suture resembles Medlicottia, but ventrolateral saddle broader and lower, with 6–8 subdivisions (commonly 2 ventrad, 2 or 3 in crest, 3 dorsad). Sutural formula: (V2 V1 V2 )v1 v2 s1 s1 l3 l2 l1 L1(d) ) UU1 U2 U3 U5 ..... [Russian]. Thirteen named species (most indeterminate). [Complex subdivision of the ventrolateral saddle in rare Gzhelian representatives from the Urals initiated lineages that diversified in the early Permian (Asselian), were rare in the succeeding Sakmarian, but then diversified again in the Artinskian to extend through the late Permian and eventual extinction of the order in the Early Triassic (Induan).]