Crazyhen Posted September 27, 2018 Share Posted September 27, 2018 Is this a tree fern/cycad fossil? It measures 12cm in diameter and is round in shape. It is from Liaoning of China. Link to comment Share on other sites More sharing options...
Crazyhen Posted September 27, 2018 Author Share Posted September 27, 2018 Link to comment Share on other sites More sharing options...
Crazyhen Posted September 27, 2018 Author Share Posted September 27, 2018 Link to comment Share on other sites More sharing options...
ynot Posted September 28, 2018 Share Posted September 28, 2018 The grain does look like fern, but I am unfamiliar with cycad. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
piranha Posted September 28, 2018 Share Posted September 28, 2018 It matches in the Osmundaceae family, prevalent in the Mesozoic of Liaoning. This paper illustrates the typical morphology. figures from: Cheng, Y.M., Wang, Y.F., & and Li, C.S. 2007 A new species of Millerocaulis (Osmundaceae) from the Middle Jurassic of China and its implication for evolution of Osmunda. International Journal of Plant Sciences, 168(9):1351-1358 PDF LINK Link to comment Share on other sites More sharing options...
ynot Posted September 28, 2018 Share Posted September 28, 2018 4 minutes ago, piranha said: It matches in the Osmundaceae family, prevalent in the Mesozoic of Liaoning. For those of us that do not understand "plantese"... a translation from wiki. Osmundaceae Temporal range: Late Permian to present Osmunda regalis Scientific classification Kingdom: Plantae Subkingdom: Embryophyta (unranked): Tracheophyta (unranked): euphyllophytes Class: Polypodiopsida Subclass: Polypodiidae Order: Osmundales Link Family: Osmundacea The Osmundaceae (royal fern family) is a family of four to six extant genera and 18–25 known species. It is the only fern family of the order Osmundales an order in the class Polypodiopsida (Filicopsida, Pteridopsida, or Leptosporangiate ferns) or in some classifications the only order in the class Osmundopsida. This is an ancient (known from the Upper Permian) and fairly isolated group that is often known as the "flowering ferns" because of the striking aspect of the ripe sporangia in Claytosmunda, Osmunda, Osmundastrum, and Plensium (subtribe Osmundinae[1]). In these genera the sporangia are borne naked on non-laminar pinnules, while Todea and Leptopteris (subtribe Todinae[1]) bear sporangia naked on laminar pinnules. Ferns in this family are larger than most other ferns. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Crazyhen Posted September 28, 2018 Author Share Posted September 28, 2018 Thanks. I also found a paper on another osmunda from Liaoning. It also looks similar to the specimen I shown. https://www.researchgate.net/publication/263389276_A_new_structurally_preserved_fern_rhizome_of_Osmundaceae_Filicales_Ashicaulis_wangii_sp_nov_from_the_Jurassic_of_western_Liaoning_and_its_significances_for_palaeobiogeography_and_evolution Link to comment Share on other sites More sharing options...
Carl Posted September 28, 2018 Share Posted September 28, 2018 Definitely a fern and a beauty! Link to comment Share on other sites More sharing options...
paleoflor Posted September 29, 2018 Share Posted September 29, 2018 Agree with permineralised fern axis, most likely from the Osmundales order. The recent review by Bomfleur et al. (2017) may be useful for further identification, as you can only distinguish between the various genera in the Osmundaceae on the basis of anatomical characteristics. Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
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