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Cytherellina
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Metacopina
Superfamily:
Healdiacea
Family:
Bairdiocyprididae
Formal Genus Name and Reference:
Cytherellina Jones & HOLL, 1869
Type Species:
Beyrichia siliqua JONES, 1855
Images
(Click to enlarge in a new window)
Fig. 285,1. *C. siliqua (Jones), M.Sil., Eng., 1a-c, carapace R, vent., post., 1d, LV int. with clinging shell, lat., all X20 (188).
Synonyms
Orthocypris
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Ord., M.Sil.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Carapace without external sculpture, smooth, elongate bythocypridid in side view, with point of greatest height in posterior half, terminal borders rounded, ventral border nearly straight; adductor muscle scars and contact marginal structures unknown, but many Paleozoic species assigned to BytllOcypris are similar to Cytherellina. [Type specimens figured by JONES and JONES & HOLL consist partly of internal molds with clinging shell material that show 2 elongate, nearly vertical, shallow depressions without external expression, one located centrally and the other anteriorly.]
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:
Cytherellina Jones & HOLL, 1869
Type Species:
Beyrichia siliqua JONES, 1855
Images
(Click to enlarge in a new window)
Fig. 285,1. *C. siliqua (Jones), M.Sil., Eng., 1a-c, carapace R, vent., post., 1d, LV int. with clinging shell, lat., all X20 (188).
Synonyms
Orthocypris
Geographic Distribution
cosmop
Age Range
Beginning Stage in Treatise Usage:
Ord., M.Sil.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Dev.
Ending International Stage:
Famennian
Fraction Up In Ending Stage:
100
Ending Date:
359.3
Description
Carapace without external sculpture, smooth, elongate bythocypridid in side view, with point of greatest height in posterior half, terminal borders rounded, ventral border nearly straight; adductor muscle scars and contact marginal structures unknown, but many Paleozoic species assigned to BytllOcypris are similar to Cytherellina. [Type specimens figured by JONES and JONES & HOLL consist partly of internal molds with clinging shell material that show 2 elongate, nearly vertical, shallow depressions without external expression, one located centrally and the other anteriorly.]