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Domatoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Nautilida
Superfamily:
Trigonocerataceae
Family:
Grypoceratidae
Formal Genus Name and Reference:
Domatoceras HYATT, 1891
Type Species:
D. umbilicatum, SD Miller, Dunbar & CONDRA, 1933
Images
(Click to enlarge in a new window)
Fig. 313, 1. *D. umbilicatum, Penn., USA (Kans.), 1a,b, X0.3, 1c, X1 (134)"
Synonyms
Stenodomatoceras, Penascoceras, Permodomatoceras, Pseudometacoceras
Geographic Distribution
N.Am.-Eu.-Afr.-Asia (China)-E.In-dies-Australia
Age Range
Beginning Stage in Treatise Usage:
U.Carb. (Penn.)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Subdiscoidal, nautiliconic, generally evolute, whorl section flattened ventrally and laterally, generally only slightly impressed dorsally, shoulders narrowly rounded to subangular, flanks typically convergent ventrally, with maximum width just above umbilical shoulders, growth lines indicate deep hyponomic sinus on venter, some forms have low ventrolateral or dorsolateral nodes (or both) in late maturity, suture with broad rounded ventral, lateral, and dorsal lobes, separated by subangular saddles, siphuncle subcentral
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Nautilida
Superfamily:
Trigonocerataceae
Family:
Grypoceratidae
Formal Genus Name and Reference:
Domatoceras HYATT, 1891
Type Species:
D. umbilicatum, SD Miller, Dunbar & CONDRA, 1933
Images
(Click to enlarge in a new window)
Fig. 313, 1. *D. umbilicatum, Penn., USA (Kans.), 1a,b, X0.3, 1c, X1 (134)"
Synonyms
Stenodomatoceras, Penascoceras, Permodomatoceras, Pseudometacoceras
Geographic Distribution
N.Am.-Eu.-Afr.-Asia (China)-E.In-dies-Australia
Age Range
Beginning Stage in Treatise Usage:
U.Carb. (Penn.)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Subdiscoidal, nautiliconic, generally evolute, whorl section flattened ventrally and laterally, generally only slightly impressed dorsally, shoulders narrowly rounded to subangular, flanks typically convergent ventrally, with maximum width just above umbilical shoulders, growth lines indicate deep hyponomic sinus on venter, some forms have low ventrolateral or dorsolateral nodes (or both) in late maturity, suture with broad rounded ventral, lateral, and dorsal lobes, separated by subangular saddles, siphuncle subcentral