| 词条 | Anoigmaichnus |
| 释义 |
| image = | image caption = | taxon = Anoigmaichnus | authority = Vinn, Wilson, Mõtus and Toom, 2014 | type_ichnospecies = †A. odinsholmensis | type_ichnospecies_authority = Vinn, Wilson, Mõtus and Toom, 2014 }} Anoigmaichnus is an ichnogenus of bioclaustrations (a type of trace fossil). Anoigmaichnus includes shafts perpendicular to their hosts' growth surfaces or tilted (up to 45°); conical to cylindrical; circular to oval cross-sections; lacking separate wall. Their apertures are elevated above their hosts' growth surfaces, forming short chimney-like structures. Anoigmaichnus is the world's earliest known macroscopic endobiotic symbiont and it may have been a parasite. It occurs in the Middle Ordovician bryozoans of Osmussaar Island, Estonia.[1]References1. ^{{cite journal |author=Vinn, O. |author2=Wilson, M.A. |author3=Mõtus, M.-A. |author4=Toom, U. |last-author-amp=yes |title=The earliest bryozoan parasite: Middle Ordovician (Darriwilian) of Osmussaar Island, Estonia |journal= Palaeogeography, Palaeoclimatology, Palaeoecology |year=2014 |volume=414 |pages=129–132 |url=https://www.researchgate.net/publication/265853181_The_earliest_bryozoan_parasite_Middle_Ordovician_%28Darriwilian%29_of_Osmussaar_Island_Estonia |accessdate = 2014-01-09 |doi=10.1016/j.palaeo.2014.08.021}} {{trace-fossil-stub}} 6 : Trace fossils|Ordovician animals|Paleozoology|Parasitism|Parasitology|Fossils of Estonia |
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