Welcome to the Forams subsite on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Cibicidina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Orbitoidacea
Family:
Cibicididae
Subfamily:
Planulininae
Formal Genus Name and Reference:
Cibicidina BANDY, 1949, *70, p. 91
Type Species:
C. walli, OD
Images
(Click to enlarge in a new window)
Fig. 552,4. *C. walli, USA (Ala.); 4a-c, opposite sides and edge view of topotype, X78 (*2117).
Synonyms
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test free, trochoid, plano-convex, periphery acutely angled and keeled, all chambers partially visible on flattened to concave spiral side although coil is partially involute, only chambers of final whorl visible from convex, umbilicate opposite side, sutures slightly depressed, wall calcareous, finely perforate, surface unornamented, aperture a low interiomarginal arch, against peripheral margin of previous whorl and extending very slightly onto spiral side. [Differs from Cibicides in being partially involute on the spiral side and in being more finely perforate. It was originally placed in the Rotaliidae, and transferred to the Anomalinidae by BERMUDEZ (1952, *127, p. 88).]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Orbitoidacea
Family:
Cibicididae
Subfamily:
Planulininae
Formal Genus Name and Reference:
Cibicidina BANDY, 1949, *70, p. 91
Type Species:
C. walli, OD
Images
(Click to enlarge in a new window)
Fig. 552,4. *C. walli, USA (Ala.); 4a-c, opposite sides and edge view of topotype, X78 (*2117).
Synonyms
Geographic Distribution
N.Am.
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Eoc.
Ending International Stage:
Priabonian
Fraction Up In Ending Stage:
100
Ending Date:
33.9
Description
Test free, trochoid, plano-convex, periphery acutely angled and keeled, all chambers partially visible on flattened to concave spiral side although coil is partially involute, only chambers of final whorl visible from convex, umbilicate opposite side, sutures slightly depressed, wall calcareous, finely perforate, surface unornamented, aperture a low interiomarginal arch, against peripheral margin of previous whorl and extending very slightly onto spiral side. [Differs from Cibicides in being partially involute on the spiral side and in being more finely perforate. It was originally placed in the Rotaliidae, and transferred to the Anomalinidae by BERMUDEZ (1952, *127, p. 88).]