Skip to main content

A new classification concept for U-shaped spreite trace fossils

Buy Article:

$39.00 plus tax (Refund Policy)

In the course of a review of the ichnogenera Diplocraterion Torell, 1870, Rhizocorallium Zenker, 1836 and Ilmenichnus Hecker, 1980, a new classification concept for these U-shaped spreite structures is proposed. The terms single-spreite lamina and double-spreite lamina structures are introduced for their classification. Single-spreite lamina structures are characterized by having one spreite lamina between the U-limbs (U-spreite lamina) resulting from the displacement (growth) of the U-limb from either proximal to distal (protrusive) or vice versa (retrusive). Double-spreite laminae are the result of the combination of a spreite lamina between the U-limbs (U-spreite lamina) plus an additional, predominantly retrusive shift of the U-limb (limb-spreite lamina). Strictly based on behaviour of the trace fossil producers, the ichnotaxonomically most relevant criteria (ichnotaxobases) of U-shaped spreite burrows are their orientation towards the bedding plane and the presence of a single-spreite lamina or double-spreite laminae. As a consequence, the newly proposed classification scheme unites simple, U-shaped structures with single-spreite lamina and with a vertical or inclined orientation under Diplocraterion (made by suspension-feeders). Wedge-shaped structures with double-spreite laminae remain under Rhizocorallium (made by mixed deposit- and suspension feeders), whereas horizontal structures are assigned to Ilmenichnus (made by deposit-feeders). The new combination Diplocraterion ultimum (Saporta & Marion, 1883) represents oblique, singlespreite lamina burrows. Many forms previously assigned to Rhizocorallium jenense are oblique single-spreite lamina burrows, now assigned to Diplocraterion ultimum (Saporta & Marion, 1883). Rhizocorallium devonicum Hecker, 1930 has priority over Rhizocorallium irregulare Mayer, 1954. The validity of Rhizocorallium commune Schmid, 1876 is questioned and its further use is not recommended as it is based on a very vague and non-diagnostic description only. Horizontal to slightly oblique spreite structures should be assigned to Ilmenichnus Hecker, 1980, which leads to the combination of Ilmenichnus devonicus (Hecker, 1930). Two new ichnospecies, Ilmenichnus atherus and Ilmenichnus multilobatus, are introduced for horizontal, uni-lobed, spreite structures with a knobby exterior, and multi-lobed, spreite structures, respectively.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: 01 April 2011

More about this publication?
  • Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more