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Orbitopsella
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Dicyclinidae
Subfamily:
Dicyclininae
Formal Genus Name and Reference:
Orbitopsella MUNIER-CHALMAS, 1902, *1328, p. 351
Type Species:
Orbitulites praecursor Gümbel, 1872, *841, p. 256 (=Orbitulites circumvulvata GÜMBEL, 1872, *841, p. 259), OD
Images
(Click to enlarge in a new window)
Fig. 214,1-3. *O. praectursor (Gümbel), L.Jur.(Lias. ), Roveredo Tyrol Alps, 1, ext. (as O. circumvulvata), X10 (*841), 2a, equat. sec., X10 (*841), 2b, central portion of equat. sec., X14 (*788), 3, axial sec., X9 (*788). --Fig. 214,4 . O. primaeva (Henson), U.Trias. or L.Jur., SW.Asia(Ornan), probably megalospheric syntype (BMNH P35788), X60 (*2115).
Synonyms
Coskinolinopsis
Geographic Distribution
Eu.-SW.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Trias.
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
L.Jur.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Test discoidal, to 18 mm. diam., may have thickened margin, early coiled stage reduced, chambers spreading in peneropline form, followed by reniform stage and later by annular chambers, at least in microspheric form, incomplete secondary septa forming chamberlets which are regularly developed and perpendicular to spiral lamella in outer layer, but irregular and in form of pillars in deeper zone of each chamber, no true alveolar structure, circular canals aligned beneath surface maybe seen in axial sections as undivided portions of circular chamber occurring between outer reticulate zone and inner regularly pillared zone, aperture consisting of irregularly distributed openings on peripheral margin.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Textulariina
Superfamily:
Lituolacea
Family:
Dicyclinidae
Subfamily:
Dicyclininae
Formal Genus Name and Reference:
Orbitopsella MUNIER-CHALMAS, 1902, *1328, p. 351
Type Species:
Orbitulites praecursor Gümbel, 1872, *841, p. 256 (=Orbitulites circumvulvata GÜMBEL, 1872, *841, p. 259), OD
Images
(Click to enlarge in a new window)
Fig. 214,1-3. *O. praectursor (Gümbel), L.Jur.(Lias. ), Roveredo Tyrol Alps, 1, ext. (as O. circumvulvata), X10 (*841), 2a, equat. sec., X10 (*841), 2b, central portion of equat. sec., X14 (*788), 3, axial sec., X9 (*788). --Fig. 214,4 . O. primaeva (Henson), U.Trias. or L.Jur., SW.Asia(Ornan), probably megalospheric syntype (BMNH P35788), X60 (*2115).
Synonyms
Coskinolinopsis
Geographic Distribution
Eu.-SW.Asia
Age Range
Beginning Stage in Treatise Usage:
U.Trias.
Beginning International Stage:
Carnian
Fraction Up In Beginning Stage:
0
Beginning Date:
237
Ending Stage in Treatise Usage:
L.Jur.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Test discoidal, to 18 mm. diam., may have thickened margin, early coiled stage reduced, chambers spreading in peneropline form, followed by reniform stage and later by annular chambers, at least in microspheric form, incomplete secondary septa forming chamberlets which are regularly developed and perpendicular to spiral lamella in outer layer, but irregular and in form of pillars in deeper zone of each chamber, no true alveolar structure, circular canals aligned beneath surface maybe seen in axial sections as undivided portions of circular chamber occurring between outer reticulate zone and inner regularly pillared zone, aperture consisting of irregularly distributed openings on peripheral margin.