Paleoplastes

Paleoplastes; Temporal range: Late Cretaceous (Cenomanian), 98.8 ± 0.62 Ma PreꞒ Ꞓ O S D C P T J K Pg N B V H B Apt. Albian C T C S Cam. M
Scientific classification
Domain:	Eukaryota
Phylum:	Amoebozoa
Infraphylum:	Mycetozoa
Class:	?Dictyostelia
Order:	incertae sedis
Genus:	†Paleoplastes; Poinar & Vega, 2021
Type species
	†Paleoplastes burmanica; Poinar & Vega, 2021

Paleoplastes (meaning "ancient plasma") is a fossil genus, potentially a dictyostelid, from the Late Cretaceous period in what is now Myanmar. It is an amoeba belonging to the phylum Amoebozoa. It comprises a single known species, Paleoplastes burmanica.

Discovery

Paleoplastes is known from a single specimen trapped within a piece of burmite, likely produced by an araucarian tree indicated by araucaroid wood fibres in the sample, from the Noije Bum Summit Site mine in the Hukawng Valley near Mong Hkun. The site was initially dated to the late Albian, but a later study placed the fossil in the early Cenomanian.

References

1 2 Shi, G.; Grimaldi, D. A.; Harlow, G. E.; Wang, J.; Wang, J.; Yang, M.; Lei, W.; Li, Q.; Li, X. (2012). "Age constraint on Burmese amber based on U–Pb dating of zircons". Cretaceous Research. 37: 155–163. Bibcode:2012CrRes..37..155S. doi:10.1016/j.cretres.2012.03.014.
1 2 3 4 Poinar, G. O. Jr; Vega, F. E. (2021) [2019]. "Mid-Cretaceous cellular slime mold (Eukarya: Dictyostelia?) in Burmese amber". Historical Biology: An International Journal of Paleobiology. 33 (5): 712–715. Bibcode:2021HBio...33..712P. doi:10.1080/08912963.2019.1658095. S2CID 202029760.

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[Shi.2012-1] 1 2 Shi, G.; Grimaldi, D. A.; Harlow, G. E.; Wang, J.; Wang, J.; Yang, M.; Lei, W.; Li, Q.; Li, X. (2012). "Age constraint on Burmese amber based on U–Pb dating of zircons". Cretaceous Research. 37: 155–163. Bibcode:2012CrRes..37..155S. doi:10.1016/j.cretres.2012.03.014.

[PoinarVega.2021-2] 1 2 3 4 Poinar, G. O. Jr; Vega, F. E. (2021) [2019]. "Mid-Cretaceous cellular slime mold (Eukarya: Dictyostelia?) in Burmese amber". Historical Biology: An International Journal of Paleobiology. 33 (5): 712–715. Bibcode:2021HBio...33..712P. doi:10.1080/08912963.2019.1658095. S2CID 202029760.