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Broennimannia persica n. ichnogen., n. ichnosp., a new crustacean microcoprolite from the Paleocene of eastern Iran

Authors :
Seyed Naser Raisossadat
Koorosh Rashidi
Felix Schlagintweit
Source :
Facies. 66
Publication Year :
2020
Publisher :
Springer Science and Business Media LLC, 2020.

Abstract

The new crustacean microcoprolite Broennimannia persica n. ichnogen., n. ichnosp., is described from the Paleocene (Danian-Selandian) of eastern Iran. The new microcoprolite is characterized by a bilateral symmetrical system of longitudinal “canals” that in transverse sections display an irregular (labyrinthine) outline with concave infoldings and rounded protuberances. The crescentic outline of parts of the canal system recalls the long-ranging ichnogenus Palaxius Bronnimann & Norton (Carboniferous to Pleistocene). In the latter ichnogenus, however, the canals are isolated. A general determination key for microcoprolites in transverse section is provided. The new microcoprolite occurs in poorly sorted foram-algal grainstones/packstones with a fine-grained siliciclastic content. The associated microfauna and –flora includes common miliolids, among the agglutinating Haymanella, Stomatorbina sp., serpulids, and dasycladalean algae (Cymopolia sp., Trinocladus atacis Segonzac). From Iran, fossil microcoprolites have been described so far only from the Upper Jurassic, Lower Cretaceous, and Miocene. Broennimannia persica represents the first Paleocene record from this area.

Details

ISSN :
16124820 and 01729179
Volume :
66
Database :
OpenAIRE
Journal :
Facies
Accession number :
edsair.doi...........56413f5d7640809b1281a6419dc912f4
Full Text :
https://doi.org/10.1007/s10347-020-00599-5