Beitrag
New occurrences of Bolonia lata Meunier from the Lower–Middle Jurassic of Germany, Algeria and France, with a stratigraphic-palaeoenvironmental review of the ichnogenus
Naimi, Mohammed Nadir; Mahboubi, Chikh Younes; Schweigert, Günter
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 313 Heft 1 (2024), p. 83 - 97
60 Literaturangaben
veröffentlicht: Nov 26, 2024
Online veröffentlicht: Oct 21, 2024
Manuskript akzeptiert: Aug 28, 2024
Manuskript erhalten: Jul 21, 2024
ArtNo. ESP155031301004, Preis: 29.00 €
Abstract
Jurassic marine successions are widely distributed in peri-Tethyan areas. Here, we report the trace fossil Bolonia lata Meunier, 1886 from the Upper Hettangian Wefensleben and Angulatensandstein formations of Germany, the Upper Aalenian Eisensandstein and Entrochal Limestone formations of Germany and France, respectively, as well as from the Lower Callovian Kheneg Formation of Algeria. The German specimens constitute the first records of this ichnogenus from this country. The studied material is interpreted as produced by the combined activity (repichnia-cubichnia) of irregular echinoids. The stratigraphic-palaeoenvironmental review of Bolonia indicates that this ichnogenus is a facies-crossing ichnotaxon, present in a wide variety of sedimentary environments, from foreshore settings to turbidite fans. Bolonia has experienced a continuous evolutionary history from the Cambrian to the Eocene, predominating in the Jurassic and being most conspicuous in Middle Jurassic strata. Paleozoic and Early Jurassic Bolonia were found only in shelf deposits. The migration of Bolonia to bathyal environments during the Middle Jurassic may be related to the increasing diversity of marine invertebrates. This colonisation of deeper settings spanned more than 350 million years, reflecting an exceptionally protracted evolutionary history of expansion.
Schlagworte
Trace fossils • Irregular echinoids • Tethys • Hettangian • Aalenian • Callovian