Paleonet: Jurassic samaras (helicopter seeds)

Tue May 25 16:03:19 UTC 2021

Hi
The seed integument and the shape of the megaspore are similar to Picea (pinaceae).
Regards,

De: Paleonet <paleonet-bounces+ntorresca=ecosur.mx at paleonet.org> en nombre de Andy Simpson <andy.g.simpson at gmail.com>
Fecha: martes, 25 de mayo de 2021, 10:48
Para: PaleoNet <paleonet at paleonet.org>
Asunto: Re: Paleonet: Jurassic samaras (helicopter seeds)
I do not believe that we can assign the seed to Pinus. The venation of the wing in Pinus is wavy, but in this seed, it is difficult to tell. I think we can tentatively assign the seed to Pinaceae, but am extremely apprehensive about assigning it to any living genus.

On Tue, May 25, 2021 at 3:06 AM Yazbeck, Thomas <yazbeckt at msu.edu<mailto:yazbeckt at msu.edu>> wrote:
What's the presumed phylogenetic position for the specimen in question? Is it a 'stem pine' or something with affinities to crown taxa?

Thomas Yazbeck

________________________________
From: Paleonet <paleonet-bounces+yazbeckt=msu.edu at paleonet.org<mailto:msu.edu at paleonet.org>> on behalf of Steve Mcloughlin <Steve.Mcloughlin at nrm.se<mailto:Steve.Mcloughlin at nrm.se>>
Sent: Monday, May 24, 2021 3:55 AM
To: PaleoNet <paleonet at paleonet.org<mailto:paleonet at paleonet.org>>
Subject: Re: Paleonet: Jurassic samaras (helicopter seeds)

These are Pinaceae (conifer) winged seeds. They are rather common in the Daohugou (Jurassic) and Jehol (Early Cretaceous) biotas of China. You can find many illustrated examples of these, and more elaborate forms, in:

Sun Ge, Zheng Shaolin, DL Dilcher, Wang Yongdong, Mei Shengwu 2001 Early Angiosperms and their Associated Plants from Western Liaoning, China. Shanghai Scientific and Technological Education Publishing House, Shanghai.

… and some additional commentary on them in:

McLoughlin, S. & Pott, C. 2019. Plant mobility in the Mesozoic: disseminule dispersal strategies of Chinese and Australian Middle Jurassic to Early Cretaceous plants. Palaeogeography, Palaeoecology, Palaeogeography 515, 47–69. https://doi.org/10.1016/j.palaeo.2017.12.036<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__https%3A%2F%2Fdoi.org%2F10.1016%2Fj.palaeo.2017.12.036__%3B!!HXCxUKc!mZiF0Bmx56EXRNBKL7BcRR-vYorgEf6Qbj-9FUJeGGPC_nTSdI2AACGQ18d6CB2V%24&data=04%7C01%7Cntorresca%40ecosur.mx%7C49685258534641dad7e208d91f949160%7C8d3be4b9be65459887c3af3137f93535%7C0%7C0%7C637575545224954560%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=FSRqXW7BjepYzlXqUssEjRCr0t2r2MtonsqM4okGf%2Fc%3D&reserved=0>

Steve

From: Paleonet <paleonet-bounces+steve.mcloughlin=nrm.se at paleonet.org<mailto:nrm.se at paleonet.org>> On Behalf Of Yazbeck, Thomas
Sent: den 23 maj 2021 05:20
To: paleonet at paleonet.org<mailto:paleonet at paleonet.org>
Subject: Paleonet: Jurassic samaras (helicopter seeds)

Hello Paleonet,

I need help searching for answers on a real head-scratcher. I saw a social media post saying that the fossil in the photo was a Jurassic example of a "helicopter seed", aka a samara, from the Tiaojishan Formation. A modern example is presented for scale and comparison. I can't find anything online about this, although I found an older publication describing samara-like seeds from Siberian Jurassic gnetophytes. Can anyone point me towards an answer on what type of plant this might pertain to?

Thomas Yazbeck

[cid:image001.jpg at 01D75155.90AE96F0]
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--
Andy Simpson, Ph.D.
Research collaborator, Smithsonian Institution
Editor, Paleobotanical Section, BSA
Macroecology - comparative phylogenetics - paleobotany
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