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Linthia

Classification

    Phylum:  
Echinodermata
    Subphylum:  
Asterozoa
    Class:  
None
    Subclass:  
Euechinoidea (sand dollars) - Superorder Atelostomata
    Order:  
Spatangoida
    Suborder:  
Hemiasterina
    Family:  
Schizasteridae
    Formal Genus Name and Reference:  
Linthia DESOR, 1853, p. 278
    Type Species:  
*L. insignis, OD


Images

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Fig. 458,3a. *L. (L.) insignis, Eoc., Switz., aboral, X0.7 (44). -- Fig. 458,36. L. (L.) sudanensis (Bather), Eoc., Afr., apical system, enl. (136i)


Synonyms

Escheria


Geographic Distribution

cosmop.


Age Range

    Beginning Stage in Treatise Usage:  
U.Cret.(Senon.)
    Beginning International Stage:  
Coniacian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
89.39
    Ending Stage in Treatise Usage:  
Plio.
    Ending International Stage:  
Piacenzian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
2.58


Description

Rounded to broadly heart-shaped, with depressed frontal ambulacrum forming frontal sinus, apical system ethmolytic, with 4 gonopores, peripetalous fasciole deeply embayed between petals




References



Museum or Author Information