Welcome to the Crustaceans subsite on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Ceratopsis
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Palaeocopida
Suborder:
Beyrichicopina
Superfamily:
Hollinacea
Family:
Quadrijugatoridae
Formal Genus Name and Reference:
Ceratopsis ULRICH, 1894
Type Species:
*Beyrichia chambersi MILLER, 1875
Images
(Click to enlarge in a new window)
Fig. 82, 2a,b. *C. chambersi (MILLER), M.Ord., USA (Minn.); 2a, RV lat., X30; 2b, vent., X27.5 (Ulrich, 1894). -- Fig. 82,2e,d. C. oculifera (HALL), U.Ord., USA (Ohio) ; 2e,d, carapace R, dors., X25, X20 (Kesling, 1951)
Synonyms
Ceratella
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Valves quadrilobate but lobes unequal, L , being large and ornate (in different species extending well above hinge line, produced as long spine, or developed as mushroom-shaped process), L2 short, not reaching hinge line, L3 with form of long ridge, and L. an elongate lobe or ridge; in most species 5, narrower than 52 or 53, ventral lobe prominent and ridgelike in some species, nearly indistinguishable in others.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Palaeocopida
Suborder:
Beyrichicopina
Superfamily:
Hollinacea
Family:
Quadrijugatoridae
Formal Genus Name and Reference:
Ceratopsis ULRICH, 1894
Type Species:
*Beyrichia chambersi MILLER, 1875
Images
(Click to enlarge in a new window)
Fig. 82, 2a,b. *C. chambersi (MILLER), M.Ord., USA (Minn.); 2a, RV lat., X30; 2b, vent., X27.5 (Ulrich, 1894). -- Fig. 82,2e,d. C. oculifera (HALL), U.Ord., USA (Ohio) ; 2e,d, carapace R, dors., X25, X20 (Kesling, 1951)
Synonyms
Ceratella
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
U.Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Valves quadrilobate but lobes unequal, L , being large and ornate (in different species extending well above hinge line, produced as long spine, or developed as mushroom-shaped process), L2 short, not reaching hinge line, L3 with form of long ridge, and L. an elongate lobe or ridge; in most species 5, narrower than 52 or 53, ventral lobe prominent and ridgelike in some species, nearly indistinguishable in others.