Abstract
AbstractPolykampton recurvum n. isp. is the sixth ichnospecies of the ichnogenus Polykampton Ooster, 1869. It is a horizontal structure composed of a median cylindrical tunnel and narrow, usually back-curved lateral lobes located in alternating position. It occurs 2–3 cm below the top of single beds in the Maastrichtian–Paleocene deep-sea turbiditic marlstones of the Monte Antola Unit in the Northern Apennines. The lobes of P. recurvum n. isp. are actively filled with gray mudstone from above through the permanently open median tunnel. The trace fossil belongs to the category sequestrichnia, which is typical of oxygenated deep-sea environments characterized by seasonal or episodic supply of organic matter into a generally oligotrophic environment. P. recurvum n. isp. was produced by a “worm,” probably a polychaete, which adapted to seasonal or only episodic supply of organic matter to the deep-sea floor. The tracemaker stored the organic-rich mud in the lobes for nutrition during times of low organic matter availability on the seafloor.UUID: http://zoobank.org/49555117-1c39-4658-8b49-3f3e2f47ba27
Funder
Uniwersytet Jagielloński w Krakowie
Publisher
Cambridge University Press (CUP)
Reference45 articles.
1. Die fossilen Fucoiden der Schweizer-Alpen, nebst Erörterungen über deren geologisches Alter;Fischer-Ooster;Bern, Huber,1858
2. Rapid subduction of organic matter by maldanid polychaetes on the North Carolina slope
3. Calcareous nannofossil biostratigraphy of the Antola Unit succession (Northern Apennines, Italy): new age constraints for the Late Cretaceous Helminthoid Flysch
4. Seasonality in the deep sea: Oceanography and Marine Biology;Tyler;An Annual Review,1988
5. Ichnology of the Rhenodanubian Flysch (Lower Cretaceous–Eocene) in Austria and Germany;Uchman;Beringeria,1999