Cylindrichnus concentricus Toots in Howard, 1966 (trace fossil) in its type locality, Upper Cretaceous, Wyoming

• Autorzy: Ekdale A. A. , Harding S. C.

Identyfikatory

DOI

10.14241/asgp.2015.018

• Języki publikacji: EN

Abstrakty

EN

Cylindrichnus concentricus is a wide spread trace fossil in shallow marine sedimentary rocks of Mesozoic and Cenozoic age. This paper clarifies the ichnotaxonomy of C. concentricus by of fering an emended diagnosis of the ichnogenus and a new diagnosis of the ichnospecies. The broad, bow-shaped architecture of C. concentricus with two openings at the sediment surface suggests that the trace maker was either a filter-feeding animal that captured suspended food particles from the water column or else a surface deposit feeder that employed tentacles or an eversible pharynx to collect nutritious sediment from the surface around one or both of the burrow openings. Although C. concentricus has been reported in a variety of different sedimentary environments around the world, in its type locality in the Cretaceous of Wyoming the trace fossilis found in low-diversity or monoichnospecific beds that exhibit hummocky cross stratification. This occurrence suggests the burrower’s tolerance (or perhaps preference) for an episodic high-energy hydrodynamic environmentre lated to major storms.

Słowa kluczowe

EN

bioturbation; Cretaceous; Cylindrichnus concentricus; type locality; Wyoming

• Wydawca: Polskie Towarzystwo Geologiczne
• Czasopismo: Annales Societatis Geologorum Poloniae
• Rocznik: 2015
• Tom: Vol. 85, No. 3
• Strony: 427--432
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Ekdale A. A.

• Department of Geology and Geophysics, University of Utah, Room 383 FASB, 115 South 1460 East, Salt Lake City, UT 84112-0102, USA

autor

Harding S. C.

• Department of Geology and Geophysics, University of Utah, Room 383 FASB, 115 South 1460 East, Salt Lake City, UT 84112-0102, USA

Bibliografia

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