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Yokoyamaella

Classification

    Phylum:  
Cnidaria
    Class:  
Anthozoa
    Subclass:  
Rugosa
    Order:  
Stauriida
    Suborder:  
Lonsdaleiina
    Family:  
Waagenophyllidae
    Subfamily:  
Waagenophyllinae
    Formal Genus Name and Reference:  
Yokoyamaella Minato & KATO, 1965a, p. 135
    Type Species:  
Lonsdaleia (?Waagenophyllum) yokoyamai Ozawa, 1925, p. 72, OD, †III, 64, Ozawa Coll., UT, Tokyo, lectotype by Minato & KATO, 1965a, p. 136


Images

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Synonyms



Geographic Distribution

Asia(Japan)-N.Z.-Eu.(Yugo.-Carnic Alps).


Age Range

    Beginning Stage in Treatise Usage:  
Perm.(Pseudoschwagerina)
    Beginning International Stage:  
Asselian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
298.89
    Ending Stage in Treatise Usage:  
Perm.(Yabeina Z.)
    Ending International Stage:  
Changhsingian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
251.9


Description

Cerioid or in part thamnasterioid, septal bases dilated to form peripheral stereozone, axial column with medial plate, few radial lamellae, and numerous conical axial tabellae, tabulae with narrow transverse annuli against the columnella, and wide peripheral clintabellae, dissepimentarium normal and moderately wide, septa rather thin except at peripheral stereozone, lonsdaleoid dissepiments may develop in angles of corallites prior to appearance of peripheral, nonparricidal offsets.




References



Museum or Author Information

Ozawa, 1925