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Beyrichoceratoides
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Pericycloidea
Family:
Muensteroceratidae
Formal Genus Name and Reference:
Beyrichoceratoides BISAT, 1924, p. 88
Type Species:
Goniatites implicatus PHILLIPS, 1836, p. 235, OD
Images
(Click to enlarge in a new window)
Fig. 20, 3a-c. *B. implicatus (Phillips), Oese, Rhenish Massif, Germany, lower Goniatites Zone, upper Visean, WMN 10009, a-b, X 2, c, suture of holotype B. truncatus Phillips, BMNH C240a, Bolland, Yorkshire, England, whorl height at 14.6 mm, X 1.6 (Korn, 1988b).
Synonyms
Eoglyphioceras
Geographic Distribution
Great Britain, Ireland, Belgium, Germany, Czech Republic, Poland, Bulgaria, Algeria, Morocco, Russia (North Urals), USA (Kentucky)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (upper Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (upper Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Conch form discoidal, with extremely narrow umbilicus, Growth lines noncrenulate, biconvex, usually fine, with well-developed ventrolateral salient and deep hyponomic sinus, no spiral ornamentation, Constrictions may be present, Ventral lobe relatively narrow, with parallel, straight sides, and moderately low median saddle, First lateral saddle broadly rounded, adventitious lobe deep, almost symmetrical
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Goniatitida
Superfamily:
Pericycloidea
Family:
Muensteroceratidae
Formal Genus Name and Reference:
Beyrichoceratoides BISAT, 1924, p. 88
Type Species:
Goniatites implicatus PHILLIPS, 1836, p. 235, OD
Images
(Click to enlarge in a new window)
Fig. 20, 3a-c. *B. implicatus (Phillips), Oese, Rhenish Massif, Germany, lower Goniatites Zone, upper Visean, WMN 10009, a-b, X 2, c, suture of holotype B. truncatus Phillips, BMNH C240a, Bolland, Yorkshire, England, whorl height at 14.6 mm, X 1.6 (Korn, 1988b).
Synonyms
Eoglyphioceras
Geographic Distribution
Great Britain, Ireland, Belgium, Germany, Czech Republic, Poland, Bulgaria, Algeria, Morocco, Russia (North Urals), USA (Kentucky)
Age Range
Beginning Stage in Treatise Usage:
Mississippian (upper Tournaisian)
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
66
Beginning Date:
351
Ending Stage in Treatise Usage:
Mississippian (upper Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Conch form discoidal, with extremely narrow umbilicus, Growth lines noncrenulate, biconvex, usually fine, with well-developed ventrolateral salient and deep hyponomic sinus, no spiral ornamentation, Constrictions may be present, Ventral lobe relatively narrow, with parallel, straight sides, and moderately low median saddle, First lateral saddle broadly rounded, adventitious lobe deep, almost symmetrical