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Lithostrotion

Classification

    Phylum:  
Cnidaria
    Class:  
Anthozoa
    Subclass:  
Rugosa
    Order:  
Stauriida
    Suborder:  
Lithostrotionina
    Family:  
Lithostrotionidae
    Subfamily:  
Lithostrotioninae
    Formal Genus Name and Reference:  
Lithostrotion FLEMING, 1828m o, 508
    Type Species:  
L. striatum; SD ICZN, Opin. 117; +I870.l4.370, missing from FLEMING Coil., RSM, Edinburgh; lectotype by ?THOMSON, 1887, p. 377 and KATO, 1971, p. 2; L.Carb., Brit. I.


Images

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Fig. 248,2a. *L. striatllm, lectotype, L.Carb., Brit. 1.; transv. sec., X 1.9 (Thomson, 1887). --Fig. 248,2b-d. L. araehnoidellm (McCoY), lectotype, Eng., Derbyshire; bod, transv., long. secs., X1.9 (Hill, n). --Fig. 248,2e,f L. flemingi (McCoY), lectotype, Eng., Derbyshire; e,!, transv., long. secs., X1.9 (Hill, n).


Synonyms

Lithostrotium, Nemaphyllum, Lasmocyathus, Lithostrocion, Nematophyllum, Lithostrontion, Lithostrocian, Cystistrotion, ?Cionodendron


Geographic Distribution

Eu. (Brit.I.-France-Belg.-Ger.-Pol.-USSR)-N. Afr. (W. Sahara-Alg.)-Asia (Kazakh. -Taymyr-Indoch.-China-Japan NE.USSR) - Australia(Queensl.-New S.Wales); U.Miss.(Meramec.), N.Am.( ?Ore.-Alaska


Age Range

    Beginning Stage in Treatise Usage:  
L.Carb.(Visean)
    Beginning International Stage:  
Visean
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
346.73
    Ending Stage in Treatise Usage:  
U.Carb.(Namur.)
    Ending International Stage:  
Bashkirian
    Fraction Up In Ending Stage:  
48.4
    Ending Date:  
319.4


Description

Cerioid; increase lateral; corallites with columella thinly lenticular in transverse section, continuous with both counter and cardinal septa or with counter septum only; other major septa may be connected with columella by septal crests on upper surfaces of tabulae; minor septa short to long, dissepimentarium normally concentric, lonsdaleoid dissepiments rare to absent; tabular floors conical, tabulae complete or incomplete when tabellae are commonly in only indistinctly bounded axial and periaxial zones; diphymorphic corallites may occur In which columella fails and tabulae become domed or flat.




References

Fleming, John, 1828, A history of British animals: xxiii +565 p., Bell \& Bradfute (Edinburgh).


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