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Trachyleberidea
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cytheracea
Family:
Trachyleberididae
Formal Genus Name and Reference:
Trachyleberidea BOWEN, 1953
Type Species:
Cythereis prestwichiana Jones & SHERBORN, 1887
Images
(Click to enlarge in a new window)
Fig. 267,4a. *T. prestwichiana (JONES & SHERBORN), Eoc.(Ypres.), Belg.; RV lat., X75 (42). -- Fig. 266,2, 267,4b. T. aranea (JONES & SHERBORN), Eoc.(Ypres.), Belg.; 266,2, LV lat., X67; 267,4b, RV int., X75 (42).
Synonyms
Geographic Distribution
Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Oligo.
Ending International Stage:
Chattian
Fraction Up In Ending Stage:
100
Ending Date:
23.04
Description
Like Costa but posterior tooth of hinge tending to be lobate (hemiamphidont), antennal muscle scar broken into 2, and median ridge of ornament discontinuous, dominated by subcentral tubercle, not bent at posterior end.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Cytheracea
Family:
Trachyleberididae
Formal Genus Name and Reference:
Trachyleberidea BOWEN, 1953
Type Species:
Cythereis prestwichiana Jones & SHERBORN, 1887
Images
(Click to enlarge in a new window)
Fig. 267,4a. *T. prestwichiana (JONES & SHERBORN), Eoc.(Ypres.), Belg.; RV lat., X75 (42). -- Fig. 266,2, 267,4b. T. aranea (JONES & SHERBORN), Eoc.(Ypres.), Belg.; 266,2, LV lat., X67; 267,4b, RV int., X75 (42).
Synonyms
Geographic Distribution
Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
Oligo.
Ending International Stage:
Chattian
Fraction Up In Ending Stage:
100
Ending Date:
23.04
Description
Like Costa but posterior tooth of hinge tending to be lobate (hemiamphidont), antennal muscle scar broken into 2, and median ridge of ornament discontinuous, dominated by subcentral tubercle, not bent at posterior end.