Ancorichnus
{{Short description|Trace fossil}}
Ancorichnus is an ichnogenus.{{Cite web|url=http://ichnology.ku.edu/invertebrate_traces/tfimages/ancorichnus.html|title=KU Ichnology|website=ichnology.ku.edu|access-date=2019-05-28}} Ancorichnus, is distinguished by structured mantle peripheral to a meniscate core. The mantle is not considered as a wall structure since it formed by the locomotive behaviour of the burrow producer.{{Cite web|url=https://www.palass.org/publications/palaeontology-journal/archive/37/2/article_pp305-337|title=The ichnogenus Beaconites and its distinction from Ancorichnus and Taenidium {{!}} The Palaeontological Association|website=www.palass.org|access-date=2019-05-28}} This ichnotaxon occurs in full relief at the top of grainstone beds 10 and 12. It is a non-branched, cylindrical, horizontal burrow with a diameter of 0.2-0.3 cm and 0.3-0.4 cm, respectively.{{Cite web|url=https://fossiilid.info/15993?mode=in_baltoscandia&lang=en|title=Ancorichnus|website=fossiilid.info|access-date=2019-05-28}}