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Streptelasma
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Streptelasmatina
Family:
Streptelasmatidae
Subfamily:
Streptelasmatinae
Formal Genus Name and Reference:
Streptelasma HALL, 1847, explanation to pl. 25, fig. 1
Type Species:
S. corniculum, SD Roemer, 1861, p. 19, †645/1(a), AMNH, New York, lectotype by NEUMAN, 1969, p. 10
Images
(Click to enlarge in a new window)
Fig. 81,1a-g. *S. corniculum Hall, lectotype, up.M. Ord., low. part of Trenton Ls., USA, Middleville, N.Y., a, central long. sec., b-g, parts of transv. secs., all X3 (Neuman, 1969).
Synonyms
Streptoplasma, Brachyelasma
Geographic Distribution
N.Am.(N.Y.Mich.), U.Ord., Eu.(U.K.-Nor.-Swed.-Est.-Urals), L.Sil., Asia (SW. China)-S. Am. (Venez.)
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:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Corallum solitary, trochoid, ceratoid, or cylindrical, with convex cardinal side, cardinal fossula open, major septa in early stages long, thin or moderately thick, normally fused into weak axial structure, in late stages thin, somewhat withdrawn from axis, and not forming axial structure, axial edges of major septa transversely corrugated and with sparse vermiform lobes, minor septa rudimentary or short, peripheral stereozone present in all stages, tabulae complete, convex, with wide axial depression and mostly with lateral tabellae, no dissepiments.
References
Museum or Author Information
Classification
Phylum:
Cnidaria
Class:
Anthozoa
Subclass:
Rugosa
Order:
Stauriida
Suborder:
Streptelasmatina
Family:
Streptelasmatidae
Subfamily:
Streptelasmatinae
Formal Genus Name and Reference:
Streptelasma HALL, 1847, explanation to pl. 25, fig. 1
Type Species:
S. corniculum, SD Roemer, 1861, p. 19, †645/1(a), AMNH, New York, lectotype by NEUMAN, 1969, p. 10
Images
(Click to enlarge in a new window)
Fig. 81,1a-g. *S. corniculum Hall, lectotype, up.M. Ord., low. part of Trenton Ls., USA, Middleville, N.Y., a, central long. sec., b-g, parts of transv. secs., all X3 (Neuman, 1969).
Synonyms
Streptoplasma, Brachyelasma
Geographic Distribution
N.Am.(N.Y.Mich.), U.Ord., Eu.(U.K.-Nor.-Swed.-Est.-Urals), L.Sil., Asia (SW. China)-S. Am. (Venez.)
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:
M.Ord.
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Corallum solitary, trochoid, ceratoid, or cylindrical, with convex cardinal side, cardinal fossula open, major septa in early stages long, thin or moderately thick, normally fused into weak axial structure, in late stages thin, somewhat withdrawn from axis, and not forming axial structure, axial edges of major septa transversely corrugated and with sparse vermiform lobes, minor septa rudimentary or short, peripheral stereozone present in all stages, tabulae complete, convex, with wide axial depression and mostly with lateral tabellae, no dissepiments.