Regnellites

Regnellites nagashimae
Temporal range: Jurassic or Cretaceous[1]
Scientific classification
Kingdom: Plantae
Division: Pteridophyta
Class: Polypodiopsida /
Pteridopsida (disputed)
Order: Salviniales
Family: Marsileaceae
Genus: Regnellites 
Species: R. nagashimae 
Binomial name
Regnellites nagashimae

Regnellites nagashimae is the oldest known fossil belonging to the fern family Marsileaceae. It comes from rocks of the Upper Jurassic or Lower Cretaceous of Japan.[1] The fossils include leaves with visible veins, as well as sporocarps.

References

  1. 1.0 1.1 Yamada, Toshihiro; Masahiro Kato (2002). "Regnellites nagashimae gen. et sp. nov., the Oldest Macrofossil of Marsileaceae, from the Upper Jurassic to Lower Cretaceous of Western Japan". International journal of Plant Science 163 (5): 715–723. doi:10.1086/342036.