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Bisulcus
Classification
Phylum:
Trace Fossils and Problematica
Class:
Unrecognized and Unrecognizalbe "genera"
Formal Genus Name and Reference:
Bisulcus HITCHCOCK, 1865, p. 18
Type Species:
*B. undulatus, M
Images
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Synonyms
Geographic Distribution
USA(Mass.)
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:
Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Continuous paired grooves separated by single ridge; poorly figured. [Doubtful whether trail or of inorganic origin; interpreted by HITCHCOCK (1865) as annelid trail, by LULL (1915) as ?mollusk trail; according to BROWN (1912), probably drag marks.]
References
Museum or Author Information
Classification
Phylum:
Trace Fossils and Problematica
Class:
Unrecognized and Unrecognizalbe "genera"
Formal Genus Name and Reference:
Bisulcus HITCHCOCK, 1865, p. 18
Type Species:
*B. undulatus, M
Images
(Click to enlarge in a new window)Synonyms
Geographic Distribution
USA(Mass.)
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:
Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
Continuous paired grooves separated by single ridge; poorly figured. [Doubtful whether trail or of inorganic origin; interpreted by HITCHCOCK (1865) as annelid trail, by LULL (1915) as ?mollusk trail; according to BROWN (1912), probably drag marks.]