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Aulotortus
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Involutinidae
Formal Genus Name and Reference:
Aulotortus Weynschenk, 1956, *2052, p. 26
Type Species:
*A. sinuosus, OD
Images
(Click to enlarge in a new window)
Fig. 605, 3. *A. sinuosus, M.Jur., Eu.(Aus.); X37 (*2052). -- Fig. 605,4,5. A oscillens (OBERHAUSER), U. Cret.(?Turon.), Turkey; 4, axial sec. of holotype, X27 (°1383); 5, equat. sec., X27 (°1383). -- Fig. 606,1-3. A. communis (KRISTAN), U.Trias. (Rhaet.), Eu.(Aus.); 1a,b, side, apert. views of holotype; 2, axial sec.; 3, equat. sec.; all X35 (*1057). -- Fig. 606,4,5. A. chialingchiangensis (Ho), Trias., China; 4, axial sec. of holotype, X200 (°923); 5, equat. sec., X200 (°923)
Synonyms
Trocholina
Geographic Distribution
Eu.-Asia(China-Turkey)
Age Range
Beginning Stage in Treatise Usage:
Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
U.Cret.(?Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Test free, lenticular, compressed to nearly globular, small spherical proloculus followed by planispirally to slightly streptospirally enrolled and undivided tubular chamber, umbilical area of both sides of test filled with secondary deposit of crystalline calcite, so that only final whorl is visible at peripheral margin, earlier whorls and spiral suture obscured by secondary filling, wall calcareous, central area may be variously ornamented with irregular or radial ridges, ventral side in some species appearing granular and suggesting termination of umbilical pillars, which merge outward into radial ridges, aperture at open end of tubular chamber, slightly asymmetrical in position.
References
Museum or Author Information
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Involutinidae
Formal Genus Name and Reference:
Aulotortus Weynschenk, 1956, *2052, p. 26
Type Species:
*A. sinuosus, OD
Images
(Click to enlarge in a new window)
Fig. 605, 3. *A. sinuosus, M.Jur., Eu.(Aus.); X37 (*2052). -- Fig. 605,4,5. A oscillens (OBERHAUSER), U. Cret.(?Turon.), Turkey; 4, axial sec. of holotype, X27 (°1383); 5, equat. sec., X27 (°1383). -- Fig. 606,1-3. A. communis (KRISTAN), U.Trias. (Rhaet.), Eu.(Aus.); 1a,b, side, apert. views of holotype; 2, axial sec.; 3, equat. sec.; all X35 (*1057). -- Fig. 606,4,5. A. chialingchiangensis (Ho), Trias., China; 4, axial sec. of holotype, X200 (°923); 5, equat. sec., X200 (°923)
Synonyms
Trocholina
Geographic Distribution
Eu.-Asia(China-Turkey)
Age Range
Beginning Stage in Treatise Usage:
Trias.
Beginning International Stage:
Induan
Fraction Up In Beginning Stage:
0
Beginning Date:
251.9
Ending Stage in Treatise Usage:
U.Cret.(?Turon.)
Ending International Stage:
Turonian
Fraction Up In Ending Stage:
100
Ending Date:
89.39
Description
Test free, lenticular, compressed to nearly globular, small spherical proloculus followed by planispirally to slightly streptospirally enrolled and undivided tubular chamber, umbilical area of both sides of test filled with secondary deposit of crystalline calcite, so that only final whorl is visible at peripheral margin, earlier whorls and spiral suture obscured by secondary filling, wall calcareous, central area may be variously ornamented with irregular or radial ridges, ventral side in some species appearing granular and suggesting termination of umbilical pillars, which merge outward into radial ridges, aperture at open end of tubular chamber, slightly asymmetrical in position.