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Planulina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Orbitoidacea
Family:
Cibicididae
Subfamily:
Planulininae
Formal Genus Name and Reference:
Planulina D'ORBIGNY, 1826, *1391, p. 280
Type Species:
P. ariminensis, SD Galloway & WISSLER, 1927, *766, p. 66
Images
(Click to enlarge in a new window)
Fig. 552,1; 553. *P. ariminensis, Rec., Italy (552,1), Plio., Italy (553); 552,1a-c, opposite sides and edge view of topotype, X46 (*2117); Fig. 553, equat. sec. showing lamellar structure and bilamellar septa, X 80 (*1531)
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test discoidal, compressed, low trochospiral, spiral side evolute, umbilical side partially evolute, periphery truncate, with thick marginal imperforate keel, sutures strongly arched, thickened, nonperforate, septa double (bilamellar), wall calcareous, radial in structure, finely perforate but with scattered large pores in addition secondarily added lamellae covering umbilical region; aperture an equatorial, interiomarginal arch, with narrow bordering lip, extending somewhat onto less evolute umbilical side, beneath the flap-like chamber margin, both apertural lip and lip-like margin of umbilical flaps imperforate.
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:
Planulina D'ORBIGNY, 1826, *1391, p. 280
Type Species:
P. ariminensis, SD Galloway & WISSLER, 1927, *766, p. 66
Images
(Click to enlarge in a new window)
Fig. 552,1; 553. *P. ariminensis, Rec., Italy (552,1), Plio., Italy (553); 552,1a-c, opposite sides and edge view of topotype, X46 (*2117); Fig. 553, equat. sec. showing lamellar structure and bilamellar septa, X 80 (*1531)
Synonyms
Geographic Distribution
cosmop.
Age Range
Beginning Stage in Treatise Usage:
Cret.
Beginning International Stage:
Berriasian
Fraction Up In Beginning Stage:
0
Beginning Date:
143.1
Ending Stage in Treatise Usage:
Rec.
Ending International Stage:
Meghalayan
Fraction Up In Ending Stage:
100
Ending Date:
0
Description
Test discoidal, compressed, low trochospiral, spiral side evolute, umbilical side partially evolute, periphery truncate, with thick marginal imperforate keel, sutures strongly arched, thickened, nonperforate, septa double (bilamellar), wall calcareous, radial in structure, finely perforate but with scattered large pores in addition secondarily added lamellae covering umbilical region; aperture an equatorial, interiomarginal arch, with narrow bordering lip, extending somewhat onto less evolute umbilical side, beneath the flap-like chamber margin, both apertural lip and lip-like margin of umbilical flaps imperforate.