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Limnocypridea
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cypridacea
Family:
Eucandonidae
Formal Genus Name and Reference:
Limnocypridea LYUBIMOVA, 1956
Type Species:
L. abscondida
Images
(Click to enlarge in a new window)
Fig. 174,1. *L. abscondida, SE.Mongolia; 1a-c, carapace L, R, dors., X13; 1d,e, LV int., RV int., XI7 (231)
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
L.Cret.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Shell large, (1.2 to 1.8 mm.), thick-walled, irregularly oval or trapezoidal, with rounded cardinal angles, posterior more obtuse, maximum curvature or margin at posteroventral side of valves; LV larger than RV, overlapping it around entire periphery but chiefly along dorsal and ventral margins, dorsal overlap very strong in some species; ends nearly equal in height, both truncated above, rounded and slightly extended below; dorsal margin straight; ventral margin concave medially; RV hinge an elevated rounded ridge that widens terminally and extends a short distance down dorsal slopes; LV with corresponding groove. Surface reticulate and tuberculate on ventral part or smooth. Pore-canal zone wide, well developed terminally and ventrally; canals straight or slightly curved; inner lamellae broadest terminally. [Fresh-water.]
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cypridacea
Family:
Eucandonidae
Formal Genus Name and Reference:
Limnocypridea LYUBIMOVA, 1956
Type Species:
L. abscondida
Images
(Click to enlarge in a new window)
Fig. 174,1. *L. abscondida, SE.Mongolia; 1a-c, carapace L, R, dors., X13; 1d,e, LV int., RV int., XI7 (231)
Synonyms
Geographic Distribution
NE.Asia
Age Range
Beginning Stage in Treatise Usage:
L.Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
L.Cret.
Ending International Stage:
Albian
Fraction Up In Ending Stage:
100
Ending Date:
100.5
Description
Shell large, (1.2 to 1.8 mm.), thick-walled, irregularly oval or trapezoidal, with rounded cardinal angles, posterior more obtuse, maximum curvature or margin at posteroventral side of valves; LV larger than RV, overlapping it around entire periphery but chiefly along dorsal and ventral margins, dorsal overlap very strong in some species; ends nearly equal in height, both truncated above, rounded and slightly extended below; dorsal margin straight; ventral margin concave medially; RV hinge an elevated rounded ridge that widens terminally and extends a short distance down dorsal slopes; LV with corresponding groove. Surface reticulate and tuberculate on ventral part or smooth. Pore-canal zone wide, well developed terminally and ventrally; canals straight or slightly curved; inner lamellae broadest terminally. [Fresh-water.]