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Syngastrioceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Gastrioceratoidea
Family:
Glaphyritidae
Subfamily:
Glaphyritinae
Formal Genus Name and Reference:
Syngastrioceras LIBROVICH, 1938, p. 81
Type Species:
Gastrioceras orientale YIN, 1935, p. 19, OD
Images
(Click to enlarge in a new window)
Fig. 49, 3a-c. *S. orientale (YIN), holotype, northwest of Wangjiapa, Guizhou, China, Moscovian, a-b, X 1 (Yin, 1935), c, suture, enlarged, magnification not stated (Yin, 1935, adapted by Bogoslovskii, Librovich, & Ruzhentsev, 1962).--FIG. 49, 3d. S. globosum (Easton), suture, Fayetteville, Washington County, Arkansas, Cane Hill Member, Hale Formation, basal Morrowan, SUI 34143, diameter at 25 mm, X 2.4 (Saunders, 1971).-Fig. 49, 3e. S. sp., cross section, Confusion Range, Utah, Chainman Shale, Chesterian, GPIT 1418/1104, X 2.8 (Kullmann & Scheuch, 1972).
Synonyms
Pseudoglaphyrites; Neogastrioceras
Geographic Distribution
Belgium, Great Britain, France, Spain, Algeria, Russia (Novaia Zemlia, South Urals), Ukraine (Donets), Kazakhstan (South Urals), Kyrgyzstan (Fergana), Tajikistan (Hissar Mountains, Pamirs), Uzbekistan (Kyzylkumi, Tian Shan), China (Guangxi, Guizhou, Xinjiang), Japan, Canada (Northwest Territories), USA (Arkansas, Illinois, Nevada, Utah, Oklahoma, Texas)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (Serpukhovian)
Beginning International Stage:
Serpukhovian
Fraction Up In Beginning Stage:
0
Beginning Date:
330.34
Ending Stage in Treatise Usage:
Pennsylvanian (Moscovian)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Conch form pachycone to globular, umbilicus moderately wide to narrow. Constrictions may be present on internal mold. Suture line similar to Glaphyrites, but first lateral saddle subacute to acute on adult stages.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Gastrioceratoidea
Family:
Glaphyritidae
Subfamily:
Glaphyritinae
Formal Genus Name and Reference:
Syngastrioceras LIBROVICH, 1938, p. 81
Type Species:
Gastrioceras orientale YIN, 1935, p. 19, OD
Images
(Click to enlarge in a new window)
Fig. 49, 3a-c. *S. orientale (YIN), holotype, northwest of Wangjiapa, Guizhou, China, Moscovian, a-b, X 1 (Yin, 1935), c, suture, enlarged, magnification not stated (Yin, 1935, adapted by Bogoslovskii, Librovich, & Ruzhentsev, 1962).--FIG. 49, 3d. S. globosum (Easton), suture, Fayetteville, Washington County, Arkansas, Cane Hill Member, Hale Formation, basal Morrowan, SUI 34143, diameter at 25 mm, X 2.4 (Saunders, 1971).-Fig. 49, 3e. S. sp., cross section, Confusion Range, Utah, Chainman Shale, Chesterian, GPIT 1418/1104, X 2.8 (Kullmann & Scheuch, 1972).
Synonyms
Pseudoglaphyrites; Neogastrioceras
Geographic Distribution
Belgium, Great Britain, France, Spain, Algeria, Russia (Novaia Zemlia, South Urals), Ukraine (Donets), Kazakhstan (South Urals), Kyrgyzstan (Fergana), Tajikistan (Hissar Mountains, Pamirs), Uzbekistan (Kyzylkumi, Tian Shan), China (Guangxi, Guizhou, Xinjiang), Japan, Canada (Northwest Territories), USA (Arkansas, Illinois, Nevada, Utah, Oklahoma, Texas)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (Serpukhovian)
Beginning International Stage:
Serpukhovian
Fraction Up In Beginning Stage:
0
Beginning Date:
330.34
Ending Stage in Treatise Usage:
Pennsylvanian (Moscovian)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Conch form pachycone to globular, umbilicus moderately wide to narrow. Constrictions may be present on internal mold. Suture line similar to Glaphyrites, but first lateral saddle subacute to acute on adult stages.