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Pygaulus

Classification

    Phylum:  
Echinodermata
    Subphylum:  
Echinozoa (sea urchins, holothurians, etc.)
    Class:  
Echinoidea
    Subclass:  
Euechinoidea (sand dollars) - Superorder Atelostomata
    Order:  
Cassiduloida
    Family:  
Nucleolitidae
    Formal Genus Name and Reference:  
Pygaulus L. AGASSIZ, 1847, p. 158
    Type Species:  
*P. desmoulinsii, SD COTTEAV, 1869, p. 124


Images

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Fig. 390,8; 391,5. *P. desmoulillsii, L.Cret.(Barrem.), Fr.; 390,8, phyllode, X 10; 391,5a-c, aboral, oral, lat., X2 (98)


Synonyms



Geographic Distribution

Eu.


Age Range

    Beginning Stage in Treatise Usage:  
Cret.( Neocom )
    Beginning International Stage:  
Berriasian
    Fraction Up In Beginning Stage:  
0
    Beginning Date:  
143.1
    Ending Stage in Treatise Usage:  
U.Cret.(Senon.)
    Ending International Stage:  
Maastrichtian
    Fraction Up In Ending Stage:  
100
    Ending Date:  
66.04


Description

Medium-sized; elongate, sides usually parallel, highly inflated; petals broad, poriferous zones narrow, all ambula- cral plates double-pored; periproct inframarginal; bourrelets slightly developed; phyllodes slightly developed, 2 series of pore pairs In each half- ambulacrum; no buccal pores.




References



Museum or Author Information