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Bairdia
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Bairdiacea
Family:
Bairdiidae
Formal Genus Name and Reference:
Bairdia MCCOV, 1844
Type Species:
B. curtus
Images
(Click to enlarge in a new window)
Fig. 141,2a,b. B. oklallOmensis HARLTON, Penn., USA (Ill.) ; 2a,b, carapace R, dors., X35 (Shaver, n). -- Fig. 141,2c,d. B. formosa BRADY, Rec., MediI.; 2c,d, LV int., RV int., X50 (363).
Synonyms
Nesidea, Morrisitina, Acratinella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Carapace mostly elongate fusiform in lateral view, with broadly arched dorsum that becomes concave terminally, especially at the rear; venter centrally straight but curved upward terminally so that extremities are nearly at mid-height, anterior end generally higher and better rounded than the posterior, which generally is acuminate; in dorsal view, lateral outlines symmetrically convex and extremities acuminate; surface of valves smooth, punctate, or rarely with protuberances; LV larger than RV, mostly overreaching it around entire margin and overlapping it, especially ventrally, around contact margin. Short ridge-and-groove hingement commonly marked by prominent cardinal angles, especially in RV; contact margins complex, with wide duplicature, vestibule, and associated structures; adductor-muscle scar pattern of several discrete spots (21,43,53).
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Ostracoda
Order:
Podocopida
Suborder:
Podocopina
Superfamily:
Bairdiacea
Family:
Bairdiidae
Formal Genus Name and Reference:
Bairdia MCCOV, 1844
Type Species:
B. curtus
Images
(Click to enlarge in a new window)
Fig. 141,2a,b. B. oklallOmensis HARLTON, Penn., USA (Ill.) ; 2a,b, carapace R, dors., X35 (Shaver, n). -- Fig. 141,2c,d. B. formosa BRADY, Rec., MediI.; 2c,d, LV int., RV int., X50 (363).
Synonyms
Nesidea, Morrisitina, Acratinella
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Carapace mostly elongate fusiform in lateral view, with broadly arched dorsum that becomes concave terminally, especially at the rear; venter centrally straight but curved upward terminally so that extremities are nearly at mid-height, anterior end generally higher and better rounded than the posterior, which generally is acuminate; in dorsal view, lateral outlines symmetrically convex and extremities acuminate; surface of valves smooth, punctate, or rarely with protuberances; LV larger than RV, mostly overreaching it around entire margin and overlapping it, especially ventrally, around contact margin. Short ridge-and-groove hingement commonly marked by prominent cardinal angles, especially in RV; contact margins complex, with wide duplicature, vestibule, and associated structures; adductor-muscle scar pattern of several discrete spots (21,43,53).