Welcome to the Cnidaria subsite on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Petalaxis
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Lonsdaleiina
Family:
Petalaxidae
Formal Genus Name and Reference:
Petalaxis Milne-Edwards & HAIME, 1852, p. 204
Type Species:
Stylaxis m'coyana MILNE-EDWARDS & HAIME, 1851, p. 453; SD ROEMER, 1883, p. 388; syntypes 2817, 2821, EM, Paris; see also SUTHERLAND, 1977, p. 185
Images
(Click to enlarge in a new window)
Fig. 263,4a-c, *P. maccoyanus (MILNE-EDWARDS & HAIME), syntypes, USSR, Colonna on R. Oka; a, lat. view, b,c, transv., long. secs., X2.0 (Hill, n; b,c, EM2821). --Fig. 266, 2a-c. P. wagneri (DE GROOT), holotype; a-c, transv., long. sees., X3.0 (de Groot, 1963).
Synonyms
Lithostrotionella, ?Stylaxis, Huananophyllum
Geographic Distribution
Eu.(Moscow Basin-Urals-Voronezh-Donbas-Spain)-Asia(China); L.Penn.(Morrow.), N. Am.(Okla.)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.( Bashkir.)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U.Carb.(Moscov.)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Cerioid; with simple, narrow axial structure of lathlike columella continuous with one long protoseptum, commonly the cardinal, commonly reinforced by one or two very short septal lamellae and sparse, steep axial tabellae based on columella or on axial tabella next below; other major septa somewhat withdrawn from axis minor septa moderately long in lonsdaleoid dissepimentarium; tabulae subhorizontal, supplemented peripherally by adaxially declined tabellae [KOZYREVA, 1974b, p. 23].
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Lonsdaleiina
Family:
Petalaxidae
Formal Genus Name and Reference:
Petalaxis Milne-Edwards & HAIME, 1852, p. 204
Type Species:
Stylaxis m'coyana MILNE-EDWARDS & HAIME, 1851, p. 453; SD ROEMER, 1883, p. 388; syntypes 2817, 2821, EM, Paris; see also SUTHERLAND, 1977, p. 185
Images
(Click to enlarge in a new window)
Fig. 263,4a-c, *P. maccoyanus (MILNE-EDWARDS & HAIME), syntypes, USSR, Colonna on R. Oka; a, lat. view, b,c, transv., long. secs., X2.0 (Hill, n; b,c, EM2821). --Fig. 266, 2a-c. P. wagneri (DE GROOT), holotype; a-c, transv., long. sees., X3.0 (de Groot, 1963).
Synonyms
Lithostrotionella, ?Stylaxis, Huananophyllum
Geographic Distribution
Eu.(Moscow Basin-Urals-Voronezh-Donbas-Spain)-Asia(China); L.Penn.(Morrow.), N. Am.(Okla.)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.( Bashkir.)
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U.Carb.(Moscov.)
Ending International Stage:
Moscovian
Fraction Up In Ending Stage:
100
Ending Date:
307.02
Description
Cerioid; with simple, narrow axial structure of lathlike columella continuous with one long protoseptum, commonly the cardinal, commonly reinforced by one or two very short septal lamellae and sparse, steep axial tabellae based on columella or on axial tabella next below; other major septa somewhat withdrawn from axis minor septa moderately long in lonsdaleoid dissepimentarium; tabulae subhorizontal, supplemented peripherally by adaxially declined tabellae [KOZYREVA, 1974b, p. 23].