The trace fossil Ctenopholeus SEILACHER & HEMLEBEN, 1966 from the Jurassic of India and Iran

Distinction from related ichnogenera

Franz Theodor Fürsich, Dhirendra K. Pandey, Deepali Kashyab, Markus Wilmsen

Research output: Contribution to journalReview article

9 Citations (Scopus)

Abstract

The relationship between the ichnogenera Saerichnites BILLINGS, 1886, Hormosiroidea SCHAFFER, 1928, and Ctenopholeus SEILACHER & HEMLEBEN, 1966 is discussed. Straight, curved to looped uniserial rows of closely spaced circular to subcircular pits or knobs (negative or positive epireliefs) have been accommodated in the ichnotaxon Ctenopholeus kutcheri SEILACHER & HEMLEBEN, 1966. They were found on a bedding plane with oscillation ripples in Upper Jurassic rocks of the Jaisalmer Basin, Rajasthan, and on flat surfaces with parting lineation in lower Jurassic sandstones of the Shemshak Formation of the eastern Alborz, Iran. In both cases, a shallow-water, high-energy environment is indicated. Evidence of a horizontal burrow situated below and connected to these pits/knobs confirms the interpretation of a three-dimensional burrow system consisting of a horizontal tunnel from which at close distance vertical shafts extended to the sediment water interface. In contrast to earlier interpretations of the burrow system as fodinichnion, it is here interpreted as an agrichnion, functioning as trap for small mobile organisms.

Original languageEnglish
Pages (from-to)641-654
Number of pages14
JournalNeues Jahrbuch fur Geologie und Palaontologie - Monatshefte
Issue number11
Publication statusPublished - 11-2006

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trace fossil
burrow
Jurassic
high energy environment
bedding plane
ripple
sediment-water interface
lineation
shaft
shallow water
tunnel
oscillation
sandstone
basin
rock

All Science Journal Classification (ASJC) codes

  • Palaeontology

Cite this

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title = "The trace fossil Ctenopholeus SEILACHER & HEMLEBEN, 1966 from the Jurassic of India and Iran: Distinction from related ichnogenera",
abstract = "The relationship between the ichnogenera Saerichnites BILLINGS, 1886, Hormosiroidea SCHAFFER, 1928, and Ctenopholeus SEILACHER & HEMLEBEN, 1966 is discussed. Straight, curved to looped uniserial rows of closely spaced circular to subcircular pits or knobs (negative or positive epireliefs) have been accommodated in the ichnotaxon Ctenopholeus kutcheri SEILACHER & HEMLEBEN, 1966. They were found on a bedding plane with oscillation ripples in Upper Jurassic rocks of the Jaisalmer Basin, Rajasthan, and on flat surfaces with parting lineation in lower Jurassic sandstones of the Shemshak Formation of the eastern Alborz, Iran. In both cases, a shallow-water, high-energy environment is indicated. Evidence of a horizontal burrow situated below and connected to these pits/knobs confirms the interpretation of a three-dimensional burrow system consisting of a horizontal tunnel from which at close distance vertical shafts extended to the sediment water interface. In contrast to earlier interpretations of the burrow system as fodinichnion, it is here interpreted as an agrichnion, functioning as trap for small mobile organisms.",
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The trace fossil Ctenopholeus SEILACHER & HEMLEBEN, 1966 from the Jurassic of India and Iran : Distinction from related ichnogenera. / Fürsich, Franz Theodor; Pandey, Dhirendra K.; Kashyab, Deepali; Wilmsen, Markus.

In: Neues Jahrbuch fur Geologie und Palaontologie - Monatshefte, No. 11, 11.2006, p. 641-654.

Research output: Contribution to journalReview article

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