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Irinoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Tornoceratina
Superfamily:
Prionoceratoidea
Family:
Prionoceratidae
Formal Genus Name and Reference:
Irinoceras RUZHENTSEV, 1947c, p. 281
Type Species:
I. arcuatum RUZHENTSEV, 1947c, p. 283, OD
Images
(Click to enlarge in a new window)
F i G . 2,5a–d. I. stevanovici K ullmann , holotype, Družetić, Serbia, Serpukhovian, MHN S9; a–c, ×2; d, suture at 12 mm diameter, ×1.4 (Stevanović & Kullmann, 1962).
Synonyms
Geographic Distribution
Ireland, France, Spain, Germany, Serbia, South Urals, Tajikistan, China (Xinjiang), Algeria, Morocco, Australia (New South Wales, Queensland), Canada (British Columbia), USA (Arkansas, Michigan)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (upper Tournaisian-Serpukhovian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (upper Tournaisian-Serpukhovian)
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Thickly discoidal, involute, with narrow or punctiform umbilicus. Growth lines coarse, rectilinear, convex, with deep hyponomic sinus. No ribs, constrictions, grooves, or spiral ornamentation. Ventral lobe pouched.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Tornoceratina
Superfamily:
Prionoceratoidea
Family:
Prionoceratidae
Formal Genus Name and Reference:
Irinoceras RUZHENTSEV, 1947c, p. 281
Type Species:
I. arcuatum RUZHENTSEV, 1947c, p. 283, OD
Images
(Click to enlarge in a new window)
F i G . 2,5a–d. I. stevanovici K ullmann , holotype, Družetić, Serbia, Serpukhovian, MHN S9; a–c, ×2; d, suture at 12 mm diameter, ×1.4 (Stevanović & Kullmann, 1962).
Synonyms
Geographic Distribution
Ireland, France, Spain, Germany, Serbia, South Urals, Tajikistan, China (Xinjiang), Algeria, Morocco, Australia (New South Wales, Queensland), Canada (British Columbia), USA (Arkansas, Michigan)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (upper Tournaisian-Serpukhovian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (upper Tournaisian-Serpukhovian)
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Thickly discoidal, involute, with narrow or punctiform umbilicus. Growth lines coarse, rectilinear, convex, with deep hyponomic sinus. No ribs, constrictions, grooves, or spiral ornamentation. Ventral lobe pouched.