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Crazyhen

Fern or cycad fossil

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Crazyhen

Is this a tree fern/cycad fossil?  It measures 12cm in diameter and is round in shape.  It is from Liaoning of China.

64261474-463F-4DE4-9A4A-35D1FC014C01.jpeg

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ynot

The grain does look like fern, but I am unfamiliar with cycad.

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ynot
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.

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Crazyhen
Carl

Definitely a fern and a beauty!

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paleoflor

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.

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