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