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Opissaster
Classification
Phylum:
Echinodermata
Subphylum:
Echinozoa (sea urchins, holothurians, etc.)
Class:
Echinoidea
Subclass:
Euechinoidea (sand dollars) - Superorder Atelostomata
Order:
Spatangoida
Suborder:
Hemiasterina
Family:
Hemiasteridae
Formal Genus Name and Reference:
Opissaster POMEL, 1883, p. 37
Type Species:
*O. polygonalis, OD
Images
(Click to enlarge in a new window)
Fig. 445,2. *O. polygonalis, Mio., N.Afr. (Alg.), 2a-c, aboral, oral, lat., X1 (136h)
Synonyms
Geographic Distribution
Medit., India, Carib.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Plio.
Ending International Stage:
Piacenzian
Fraction Up In Ending Stage:
100
Ending Date:
2.58
Description
Outline ovoid, deep frontal sinus, deeply depressed petals, apical system ethmolytic, with 2 to 4 gonopores
References
Pomel, Auguste, 1883, Classification méthodique et genera des Échinides vivants et fossiles: 131 p., 1 pl ., Adolphe Jourdan (Alger).
Museum or Author Information
Classification
Phylum:
Echinodermata
Subphylum:
Echinozoa (sea urchins, holothurians, etc.)
Class:
Echinoidea
Subclass:
Euechinoidea (sand dollars) - Superorder Atelostomata
Order:
Spatangoida
Suborder:
Hemiasterina
Family:
Hemiasteridae
Formal Genus Name and Reference:
Opissaster POMEL, 1883, p. 37
Type Species:
*O. polygonalis, OD
Images
(Click to enlarge in a new window)
Fig. 445,2. *O. polygonalis, Mio., N.Afr. (Alg.), 2a-c, aboral, oral, lat., X1 (136h)
Synonyms
Geographic Distribution
Medit., India, Carib.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Plio.
Ending International Stage:
Piacenzian
Fraction Up In Ending Stage:
100
Ending Date:
2.58
Description
Outline ovoid, deep frontal sinus, deeply depressed petals, apical system ethmolytic, with 2 to 4 gonopores
References
Pomel, Auguste, 1883, Classification méthodique et genera des Échinides vivants et fossiles: 131 p., 1 pl ., Adolphe Jourdan (Alger).