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Darwinula
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Darwinulacea
Family:
Darwinulidae
Formal Genus Name and Reference:
Darwinula Brady & ROBERTSON, 1885
Type Species:
*Polycheles steuensoni Brady & ROBERTSON, 1870
Images
(Click to enlarge in a new window)
Fic. 183,2a-c. *D. stevensoni (Brady & Robertson), Rec., Eu., 2a,b, female carapace R , dors., X80, 2c, muscle scar (RV lat.), X1,000 (2a-c, Triebel, 2b, Sars). -- Fig. 183,2d,e. D. sp., Rec., Eng., 2d,e, muscle-scar patterns RV, LV, X200 (Sylvester-Bradley, n).
Synonyms
Polycheles, Cyprione
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Ord., U.Carb. (Penn.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Elongate, oblong or ovate, RV much larger than LV. Hinge formed by simple RV overlap, muscle scar comprising about a dozen elongate, radially arranged spots anterior to middle; calcified inner lamellae lacking (Brady & Norman, 1889). [Fresh- or brackish-water.]
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Darwinulacea
Family:
Darwinulidae
Formal Genus Name and Reference:
Darwinula Brady & ROBERTSON, 1885
Type Species:
*Polycheles steuensoni Brady & ROBERTSON, 1870
Images
(Click to enlarge in a new window)
Fic. 183,2a-c. *D. stevensoni (Brady & Robertson), Rec., Eu., 2a,b, female carapace R , dors., X80, 2c, muscle scar (RV lat.), X1,000 (2a-c, Triebel, 2b, Sars). -- Fig. 183,2d,e. D. sp., Rec., Eng., 2d,e, muscle-scar patterns RV, LV, X200 (Sylvester-Bradley, n).
Synonyms
Polycheles, Cyprione
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Ord., U.Carb. (Penn.)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Elongate, oblong or ovate, RV much larger than LV. Hinge formed by simple RV overlap, muscle scar comprising about a dozen elongate, radially arranged spots anterior to middle; calcified inner lamellae lacking (Brady & Norman, 1889). [Fresh- or brackish-water.]