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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
(Click to enlarge in a new window)
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
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
(Click to enlarge in a new window)
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.