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Trocholina
Classification
Phylum:
Protista
Subphylum:
Sarcodina
Class:
Reticularea
Subclass:
Granuloreticulosia
Order:
Foraminiferida
Suborder:
Rotalina
Superfamily:
Cassidulinacea
Family:
Involutinidae
Formal Genus Name and Reference:
Trocholina PAALZOW, 1922, *1404, p. 10
Type Species:
Involutina conica Schlumberger, 1898, *1659, p. 151, SD CUSHMAN, 1933, *461, p. 234
Images
(Click to enlarge in a new window)
Fig. 610,1,2. *T . conica (SCHLUMBERGER), M.Jur., Ger. (1), M.Jur.(Bathon.), Fr. (2); 1a-c, spiral, umbilical, and edge views, X 66 (*2117); 2, axial sec. of holotype, X113 (*1525). - -Fig. 610,3,4. T. valdensis (REICHEL), L.Cret.(Valangin.), Switz.; 3a,b, umbilical and edge views, X64 ('1525); 4, axial sec. showing umbilical pillars, X66 (*1525). -- Fig. 610,5-7. T. crassa KRISTAN, U.Trias.(Rhaet.), Eu.(Aus.); 5, umbilical view; 6, edge view of different specimen; 7, axial sec.; all X24 (*1057)
Synonyms
Neotrocholina
Geographic Distribution
Eu.-USA-Carib.-Afr.- M.East
Age Range
Beginning Stage in Treatise Usage:
U.Trias.(Rhaet.)
Beginning International Stage:
Rhaetian
Fraction Up In Beginning Stage:
0
Beginning Date:
205.74
Ending Stage in Treatise Usage:
U.Cret.( Cenoman.)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Test free, conical, consisting of globular proloculus and spirally enrolled tubular second chamber, which is dorsally evolute with all whorls visible, ventral umbilical region completely filled with coarse calcite crystals, appearing as irregularly arranged pillars, nodes or beads on surface; wall calcareous, dorsally coarsely perforate, ventrally more finely perforate, granular in structure, surface smooth or with elevated spiral suture, ventral surface of final whorl may show somewhat curved faint growth striae, which end in pustules at umbilical margin; aperture at open end of tube.
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:
Trocholina PAALZOW, 1922, *1404, p. 10
Type Species:
Involutina conica Schlumberger, 1898, *1659, p. 151, SD CUSHMAN, 1933, *461, p. 234
Images
(Click to enlarge in a new window)
Fig. 610,1,2. *T . conica (SCHLUMBERGER), M.Jur., Ger. (1), M.Jur.(Bathon.), Fr. (2); 1a-c, spiral, umbilical, and edge views, X 66 (*2117); 2, axial sec. of holotype, X113 (*1525). - -Fig. 610,3,4. T. valdensis (REICHEL), L.Cret.(Valangin.), Switz.; 3a,b, umbilical and edge views, X64 ('1525); 4, axial sec. showing umbilical pillars, X66 (*1525). -- Fig. 610,5-7. T. crassa KRISTAN, U.Trias.(Rhaet.), Eu.(Aus.); 5, umbilical view; 6, edge view of different specimen; 7, axial sec.; all X24 (*1057)
Synonyms
Neotrocholina
Geographic Distribution
Eu.-USA-Carib.-Afr.- M.East
Age Range
Beginning Stage in Treatise Usage:
U.Trias.(Rhaet.)
Beginning International Stage:
Rhaetian
Fraction Up In Beginning Stage:
0
Beginning Date:
205.74
Ending Stage in Treatise Usage:
U.Cret.( Cenoman.)
Ending International Stage:
Cenomanian
Fraction Up In Ending Stage:
100
Ending Date:
93.9
Description
Test free, conical, consisting of globular proloculus and spirally enrolled tubular second chamber, which is dorsally evolute with all whorls visible, ventral umbilical region completely filled with coarse calcite crystals, appearing as irregularly arranged pillars, nodes or beads on surface; wall calcareous, dorsally coarsely perforate, ventrally more finely perforate, granular in structure, surface smooth or with elevated spiral suture, ventral surface of final whorl may show somewhat curved faint growth striae, which end in pustules at umbilical margin; aperture at open end of tube.