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Cheilosporites
Classification
Phylum:
Trace Fossils and Problematica
Class:
Microproblematica
Formal Genus Name and Reference:
Cheilosporites WÄHNER, 1903, p. 100
Type Species:
*C. tirolensis, M
Images
(Click to enlarge in a new window)
Fig. 94,4 . *C. tirolensis, Trias. (Rhaet.), Aus., X2.5 (Fischer, 1962)
Synonyms
Geographic Distribution
Ger.-Aus.-N.Alps-Yugosl., S.Alps
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.Trias.(Rhaet.)
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Large arborescent colonies, only fragmentarily preserved, height of single shrubby colonies about 5 cm, "branches" composed of uniserial but branching rows of chambers (diameter 0.6 to 4.0 mm max.), penetrated by axial siphon, chambers enlarging and altering their shape distally from casklike to bowl-like and finally in uppermost parts of "branches" vaselike, wall 0.01 to 0.04 mm thick, consisting of calcite grains 0.01 to 0.02 mm in diameter; probably guide fossil for Rhaetian. [WAHNER (1903), LEUcHS (1928), SIEBER (1937), and LOEBLICH & TAPPAN (1964) regarded Cheilosporites as alga; PIA (1939) compared it with Sphinctozoa resembling Amblysiphone/la; tentatively referred by FISCHER (1962) to Foraminiferida, representative of new family Cheilosporitidae; see also LOEBLICH & TAPPAN, 1964, p. C786.]
References
Museum or Author Information
Classification
Phylum:
Trace Fossils and Problematica
Class:
Microproblematica
Formal Genus Name and Reference:
Cheilosporites WÄHNER, 1903, p. 100
Type Species:
*C. tirolensis, M
Images
(Click to enlarge in a new window)
Fig. 94,4 . *C. tirolensis, Trias. (Rhaet.), Aus., X2.5 (Fischer, 1962)
Synonyms
Geographic Distribution
Ger.-Aus.-N.Alps-Yugosl., S.Alps
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.Trias.(Rhaet.)
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Large arborescent colonies, only fragmentarily preserved, height of single shrubby colonies about 5 cm, "branches" composed of uniserial but branching rows of chambers (diameter 0.6 to 4.0 mm max.), penetrated by axial siphon, chambers enlarging and altering their shape distally from casklike to bowl-like and finally in uppermost parts of "branches" vaselike, wall 0.01 to 0.04 mm thick, consisting of calcite grains 0.01 to 0.02 mm in diameter; probably guide fossil for Rhaetian. [WAHNER (1903), LEUcHS (1928), SIEBER (1937), and LOEBLICH & TAPPAN (1964) regarded Cheilosporites as alga; PIA (1939) compared it with Sphinctozoa resembling Amblysiphone/la; tentatively referred by FISCHER (1962) to Foraminiferida, representative of new family Cheilosporitidae; see also LOEBLICH & TAPPAN, 1964, p. C786.]