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Healdianella
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Metacopina
Superfamily:
Healdiacea
Family:
Bairdiocyprididae
Formal Genus Name and Reference:
Healdianella POSNER, 1951
Type Species:
H. darwintilinoides
Images
(Click to enlarge in a new window)
Fig. 285,5. *H. darwinulinoides; 5a,b, carapace R, vent., X72 (281). -- Fig. 284,4. H. darwinlllinoides?; adductor muscle scar, X70 (281)
Synonyms
Geographic Distribution
E.Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
L.Carb.
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Nearly like Healdia in shape and small size but lacking ridges, shoulders, and spines, contactmarginal structures and adductor muscle scars as described for family. [The Devonian species from Russia referred to the genus apparently should be assigned to Cytherellina and other genera; some of POSNER'S original species appear to differ from Cytherellina only in their smaller size.]
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Metacopina
Superfamily:
Healdiacea
Family:
Bairdiocyprididae
Formal Genus Name and Reference:
Healdianella POSNER, 1951
Type Species:
H. darwintilinoides
Images
(Click to enlarge in a new window)
Fig. 285,5. *H. darwinulinoides; 5a,b, carapace R, vent., X72 (281). -- Fig. 284,4. H. darwinlllinoides?; adductor muscle scar, X70 (281)
Synonyms
Geographic Distribution
E.Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Carb.
Beginning International Stage:
Tournaisian
Fraction Up In Beginning Stage:
0
Beginning Date:
359.3
Ending Stage in Treatise Usage:
L.Carb.
Ending International Stage:
Serpukhovian
Fraction Up In Ending Stage:
100
Ending Date:
323.4
Description
Nearly like Healdia in shape and small size but lacking ridges, shoulders, and spines, contactmarginal structures and adductor muscle scars as described for family. [The Devonian species from Russia referred to the genus apparently should be assigned to Cytherellina and other genera; some of POSNER'S original species appear to differ from Cytherellina only in their smaller size.]