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Lockhartia
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Rotaliidae
Subfamily:
Rotaliinae
Formal Genus Name and Reference:
Lockhartia DAVIES, 1932, *561, p. 406
Type Species:
Dictyoconoides haimei DAVIES, 1927, *559, p. 280, OD
Images
(Click to enlarge in a new window)
Fig. 485,1-3. *L. haimei (DAVIES), Paleoc., India; 1a-c, opposite sides and edge view of topotype, X26 (*2117); 2, axial sec. showing umbilical pillars, X30; 3, diagram. sec. (*561)
Synonyms
Geographic Distribution
Asia(lndia-Arabia-Iraq)-E. Afr.-S. Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
M.Eoc.
Ending International Stage:
Bartonian
Fraction Up In Ending Stage:
100
Ending Date:
37.71
Description
Test conical to lenticular, trochospiral, chambers forming outer layer of cone, leaving wide umbilical area, chamber walls curving inward toward umbilicus leaving open only marginal slit which opens into cavity between outer wall laminae may result in irregular buttresses or pillars, which fill umbilical area, appearing as granules at umbilical surface, may be labyrinthic; wall calcareous, of laminated radially fibrous calcite, coarsely perforate, aperture an interiomarginal slit. [Lockhartia has numerous intercommunicating umbilical cavities into which the cortical chambers open, and which open to the exterior as large pores on the umbilical side. Rotalia differs in having a solid umbilical plug or fissured one with a spiral canal beneath the chambers and tributary canals connecting to them. Dictyoconoides is similar to Lockhartia, but has intercalary whorls into the spire.]
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Rotaliacea
Family:
Rotaliidae
Subfamily:
Rotaliinae
Formal Genus Name and Reference:
Lockhartia DAVIES, 1932, *561, p. 406
Type Species:
Dictyoconoides haimei DAVIES, 1927, *559, p. 280, OD
Images
(Click to enlarge in a new window)
Fig. 485,1-3. *L. haimei (DAVIES), Paleoc., India; 1a-c, opposite sides and edge view of topotype, X26 (*2117); 2, axial sec. showing umbilical pillars, X30; 3, diagram. sec. (*561)
Synonyms
Geographic Distribution
Asia(lndia-Arabia-Iraq)-E. Afr.-S. Am.
Age Range
Beginning Stage in Treatise Usage:
Paleoc.
Beginning International Stage:
Danian
Fraction Up In Beginning Stage:
0
Beginning Date:
66.04
Ending Stage in Treatise Usage:
M.Eoc.
Ending International Stage:
Bartonian
Fraction Up In Ending Stage:
100
Ending Date:
37.71
Description
Test conical to lenticular, trochospiral, chambers forming outer layer of cone, leaving wide umbilical area, chamber walls curving inward toward umbilicus leaving open only marginal slit which opens into cavity between outer wall laminae may result in irregular buttresses or pillars, which fill umbilical area, appearing as granules at umbilical surface, may be labyrinthic; wall calcareous, of laminated radially fibrous calcite, coarsely perforate, aperture an interiomarginal slit. [Lockhartia has numerous intercommunicating umbilical cavities into which the cortical chambers open, and which open to the exterior as large pores on the umbilical side. Rotalia differs in having a solid umbilical plug or fissured one with a spiral canal beneath the chambers and tributary canals connecting to them. Dictyoconoides is similar to Lockhartia, but has intercalary whorls into the spire.]