Palaeopascichnus

Not to be confused with Palaeopascichnid.

Palaeopascichnus Temporal range: Ediacaran, 580–542  Ma [1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Incertae sedis
Genus:	† Palaeopascichnus Palij, 1976
Species
P. delicatusPalij, 1976 (type) P. linearisFedonkin, 1976 P. gracilisFedonkin, 1985
Synonyms
InritesFedonkin, 1980 YelovichnusFedonkin, 1985 CatellichnusBecker, 1989 IterichnusBecker, 2013 PseudobergaueriaBecker, 2013

Palaeopascichnus is an Ediacaran fossil comprising a series of lobes, first originating before the Gaskiers glaciation; ^[1] it is plausibly a protozoan, but probably unrelated to the classical 'Ediacaran biota'. ^[2] Once thought to represent a trace fossil, it is now recognized as a body fossil ^[3] and corresponds to the skeleton of an agglutinating organism. ^[4]

See also

• List of Ediacaran genera

• Palaeopascichnid

References

1. Liu, Alexander G.; Tindal, Benjamin H. (2020). "Ediacaran macrofossils prior to the ~580 Ma Gaskiers glaciation in Newfoundland, Canada". Lethaia. 54 (2): 260–270. doi: 10.1111/let.12401 .
2. Antcliffe, J. B.; Gooday, A. J.; Brasier, M. D. (2011). "Testing the protozoan hypothesis for Ediacaran fossils: A developmental analysis of Palaeopascichnus". Palaeontology. 54 (5): 1157. Bibcode:2011Palgy..54.1157A. doi: 10.1111/j.1475-4983.2011.01058.x .
3. Jensen, S. (2003). "The Proterozoic and Earliest Cambrian Trace Fossil Record; Patterns, Problems and Perspectives". Integrative and Comparative Biology. 43 (1): 219–28. doi: 10.1093/icb/43.1.219 . PMID   21680425.
4. Kolesnikov, Anton V; Rogov, Vladimir I; Bykova, Natalia V; Danelian, Taniel; Clausen, Sébastien; Maslov, Andrey V; Grazhdankin, Dmitriy V (2018). "The oldest skeletal macroscopic organism Palaeopascichnus linearis". Precambrian Research. 316: 24–37. Bibcode:2018PreR..316...24K. doi:10.1016/j.precamres.2018.07.017. S2CID   134885946.