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Kionoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Orthocerida
Superfamily:
Orthocerataceae
Family:
Orthoceratidae
Subfamily:
Kionoceratinae
Formal Genus Name and Reference:
Kionoceras HYATT, 1884, p. 275
Type Species:
Orthoceras doricum BARRANDE, 1868, pl. 269, OD
Images
(Click to enlarge in a new window)
Fig. 159,1. *K. doricum (Barrande), M.Sil., Eu. (Czech.), 1a-c, long. sec., lat., apical views, x1 (5).
Synonyms
Geographic Distribution
N.Am.-Eu.-AsiaAustralia
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
L.Perm.
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Slender to rapidly expanding, apically curved, longitudinally fluted orthocones of circular to subcircular section, Surface ornament of prominent longitudinal ribs separated by concave interspaces and, in most species, less conspicuous longitudinal and transverse lirae or striae, Early-formed part of test may be faintly annulated, Siphuncle central to subcentral, empty in Silurian type-species and in most Ordovician species, but with annulosiphonate deposits in some questionably congeneric Silurian and later species, necks straight, or suborthochoanitic, segments cylindrical or weakly expanded within camerae
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Orthocerida
Superfamily:
Orthocerataceae
Family:
Orthoceratidae
Subfamily:
Kionoceratinae
Formal Genus Name and Reference:
Kionoceras HYATT, 1884, p. 275
Type Species:
Orthoceras doricum BARRANDE, 1868, pl. 269, OD
Images
(Click to enlarge in a new window)
Fig. 159,1. *K. doricum (Barrande), M.Sil., Eu. (Czech.), 1a-c, long. sec., lat., apical views, x1 (5).
Synonyms
Geographic Distribution
N.Am.-Eu.-AsiaAustralia
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
L.Perm.
Ending International Stage:
Kungurian
Fraction Up In Ending Stage:
100
Ending Date:
274.37
Description
Slender to rapidly expanding, apically curved, longitudinally fluted orthocones of circular to subcircular section, Surface ornament of prominent longitudinal ribs separated by concave interspaces and, in most species, less conspicuous longitudinal and transverse lirae or striae, Early-formed part of test may be faintly annulated, Siphuncle central to subcentral, empty in Silurian type-species and in most Ordovician species, but with annulosiphonate deposits in some questionably congeneric Silurian and later species, necks straight, or suborthochoanitic, segments cylindrical or weakly expanded within camerae