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Monoleaia
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Branchiopoda
Subclass:
Diplostraca
Order:
Conchostraca
Suborder:
Spinicaudata
Superfamily:
Leaioidea
Family:
Leaiidae
Formal Genus Name and Reference:
Monoleaia TASCH, 1956
Type Species:
*Leaia unicostata REED, 1929, OD
Images
(Click to enlarge in a new window)
Fig. 55,5a,b. *M. unicostata (Reed), U.Perm., Brazil, 5a, left valve, X9, 5b, detail of ornamentation, X9 (112). -- Fig. 55,5c. M. monocarinata (Lyutkevich), 1956 = Leaia monocarinata Lyutkevich, 1941, U.Perm.(Tartarian), USSR, right valve, X20 (80)
Synonyms
Iaxartus, Inkus, Monoleaia
Geographic Distribution
SW. Asia (Kazakhstan), S. Am. (Brazil)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U. Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Carapace subovate, valves with single imbricate or nodose radial extending from umbo to rounded posterior ventral margin.
References
Tasch, Paul, 1956, Three general principles for a system of classification of fossil conchostracans: Jour. Paleontology, v. 30, p. 1248-1257.
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Branchiopoda
Subclass:
Diplostraca
Order:
Conchostraca
Suborder:
Spinicaudata
Superfamily:
Leaioidea
Family:
Leaiidae
Formal Genus Name and Reference:
Monoleaia TASCH, 1956
Type Species:
*Leaia unicostata REED, 1929, OD
Images
(Click to enlarge in a new window)
Fig. 55,5a,b. *M. unicostata (Reed), U.Perm., Brazil, 5a, left valve, X9, 5b, detail of ornamentation, X9 (112). -- Fig. 55,5c. M. monocarinata (Lyutkevich), 1956 = Leaia monocarinata Lyutkevich, 1941, U.Perm.(Tartarian), USSR, right valve, X20 (80)
Synonyms
Iaxartus, Inkus, Monoleaia
Geographic Distribution
SW. Asia (Kazakhstan), S. Am. (Brazil)
Age Range
Beginning Stage in Treatise Usage:
U.Carb.
Beginning International Stage:
Bashkirian
Fraction Up In Beginning Stage:
0
Beginning Date:
323.4
Ending Stage in Treatise Usage:
U. Perm.
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Carapace subovate, valves with single imbricate or nodose radial extending from umbo to rounded posterior ventral margin.
References
Tasch, Paul, 1956, Three general principles for a system of classification of fossil conchostracans: Jour. Paleontology, v. 30, p. 1248-1257.