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Gastrioceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Gastrioceratoidea
Family:
Gastrioceratidae
Formal Genus Name and Reference:
Gastrioceras Hyatt, 1884 in 1883–1884, p. 327
Type Species:
Ammonites listeri s oW er B y , 1814, p. 97; SD Foord & cricK, 1897, p. 226; non martin, 1809, pl. 35,3; see Opinion 231, ICZN, 1954, p. 239)
Images
(Click to enlarge in a new window)
—F ig . 60,1a–c. *G. listeri (soWerBy), Shore, Lancashire, Bullion Mine, England, Langsettian, GSM 56454; a–b, ×2 (new, courtesy of W. Ramsbottom; same specimen as Ramsbottom & Calver, 1962, pl.15,9); c, suture, BMNH C. 4953, provenance not stated, diameter at 58.5 mm, magnification not stated (Foord & Crick, 1897).——F ig . 60,1d. G. carbonarium carbonarium ( von B uch ), cross section, EssenRellinghausen, Mine Langenbrahm II, Rhenish Massif, Germany, Langsettian, GMB P220, Foto 2130, × 2.6 (Kullmann, new, same specimen as Patteisky, 1965, pl. 7,4b).
Synonyms
Gastrioceras (Lissogastrioceras)
Geographic Distribution
Belgium, Netherlands, Great Britain, Ireland, Germany, Portugal, Algeria, Morocco, Poland, Ukraine (Donets), Uzbekistan (Fergana), China (Gansu, Guizhou, Xinjiang, Ningxia), Japan, Canada (Northwest Territories), USA (Arkansas, Illinois, Ohio, Kentucky, Oklahoma, Texas, Alabama).
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (upper Bashkirian [Langsettian])
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
56.3
Beginning Date:
318.76
Ending Stage in Treatise Usage:
Pennsylvanian (Moscovian)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Conch form typically broad. Umbilical shoulder ornamented with nodes that are elongated transversely; in some species rather strong ribs. Longitudinal lirae usually very faint or absent, sometimes confined to umbilical shoulders. Suture similar to Glaphyrites, ventral lobe wide, height of median saddle exceeding half height of entire ventral lobe, its prongs being slightly pouched or attenuate; first lateral saddle broadly rounded, adventitious lobe deep, relatively wide and bell shaped, in some forms attenuate. Many species. [Lissogastrioceras exhibits smooth unornamented ventral regions, regarded herein as being of specific significance.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Gastrioceratoidea
Family:
Gastrioceratidae
Formal Genus Name and Reference:
Gastrioceras Hyatt, 1884 in 1883–1884, p. 327
Type Species:
Ammonites listeri s oW er B y , 1814, p. 97; SD Foord & cricK, 1897, p. 226; non martin, 1809, pl. 35,3; see Opinion 231, ICZN, 1954, p. 239)
Images
(Click to enlarge in a new window)
—F ig . 60,1a–c. *G. listeri (soWerBy), Shore, Lancashire, Bullion Mine, England, Langsettian, GSM 56454; a–b, ×2 (new, courtesy of W. Ramsbottom; same specimen as Ramsbottom & Calver, 1962, pl.15,9); c, suture, BMNH C. 4953, provenance not stated, diameter at 58.5 mm, magnification not stated (Foord & Crick, 1897).——F ig . 60,1d. G. carbonarium carbonarium ( von B uch ), cross section, EssenRellinghausen, Mine Langenbrahm II, Rhenish Massif, Germany, Langsettian, GMB P220, Foto 2130, × 2.6 (Kullmann, new, same specimen as Patteisky, 1965, pl. 7,4b).
Synonyms
Gastrioceras (Lissogastrioceras)
Geographic Distribution
Belgium, Netherlands, Great Britain, Ireland, Germany, Portugal, Algeria, Morocco, Poland, Ukraine (Donets), Uzbekistan (Fergana), China (Gansu, Guizhou, Xinjiang, Ningxia), Japan, Canada (Northwest Territories), USA (Arkansas, Illinois, Ohio, Kentucky, Oklahoma, Texas, Alabama).
Age Range
Beginning Stage in Treatise Usage:
Pennsylvanian (upper Bashkirian [Langsettian])
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
56.3
Beginning Date:
318.76
Ending Stage in Treatise Usage:
Pennsylvanian (Moscovian)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Conch form typically broad. Umbilical shoulder ornamented with nodes that are elongated transversely; in some species rather strong ribs. Longitudinal lirae usually very faint or absent, sometimes confined to umbilical shoulders. Suture similar to Glaphyrites, ventral lobe wide, height of median saddle exceeding half height of entire ventral lobe, its prongs being slightly pouched or attenuate; first lateral saddle broadly rounded, adventitious lobe deep, relatively wide and bell shaped, in some forms attenuate. Many species. [Lissogastrioceras exhibits smooth unornamented ventral regions, regarded herein as being of specific significance.]