Sphenopteris
Sphenopteris is a genus of seed ferns containing the foliage of various extinct plants, ranging from the Devonian to Late Cretaceous.[1][2]
| Sphenopteris | |
|---|---|
 | |
| S. schumannii specimen on display at Musée d'Histoire Naturelle de Lille | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | †Pteridospermatophyta |
| Class: | †Lyginopteridopsida |
| Order: | †Lyginopteridales |
| Family: | †Lyginopteridaceae |
| Genus: | †Sphenopteris Sternberg 1825 |
| Species | |
| |
Distribution
In Brazil, fossil of form genus Sphenopteris was located in outcrop Morro Papalé in the city of Mariana Pimentel. They are in the geopark Paleorrota in Rio Bonito Formation and date from Sakmarian in Permian.[3] Fossils of Sphenopteris have also been found in the Valle Alto Formation, Caldas, Colombia, among many other locations.[4]
gollark: Quoted from my notes:The relevant factors for course choice are probably something like this, vaguely in order: “personal fit” - how much I'll actually like it. This is quite hard to tell in advance. During the Y11 careers interview I was recommended some kind of trial thing for engineering, but I doubt that's on now, like many other things. Probably more important than other things, as I'd spend 3-5 years on said course, will perform better if I do enjoy it, and will probably not get much use out of studying a subject I would not like enough to do work related to. flexibility/generality - what options are opened by studying this stuff? Especially important in a changing and unpredictable world. how hard a subject is to learn out of university - relates to necessity of feedback from people who know it much better, specialized equipment needed, availability of good teaching resources, etc. Likely to decline over time due to the internet/modern information exchange systems and advancing technology making relevant equipment cheaper. earning potential - how much money does studying this bring? I don't think this is massively significant, it's probably outweighed by other things quite rapidly, but something to consider. Apparently high for quantitative and applied subjects. entry requirements - how likely I am to be able to study it. There are some things I probably cannot do at all now, such as medicine, but I didn't and don't really care about those, and there shouldn't be many. Most of the high-requirement stuff is seemingly available with more practical ones at less prestigious universities, which is probably fine.
gollark: Replying to https://discord.com/channels/346530916832903169/348702212110680064/759121895022002206Well, yes, somewhat, BUT! There are other considerations™.
gollark: Weird.
gollark: Replying to https://discord.com/channels/346530916832903169/348702212110680064/759121667070492682<@!332271551481118732> Yes, possibly.
gollark: The power of yet!
References
- Palmer, Douglas; et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (1st American ed.). New York: Dorling Kindersley. p. 149. ISBN 978-0-7566-5573-0.
- Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
- Afloramento Morro do Papaléo, Mariana Pimentel, RS
- Sphenopteris at Fossilworks.org
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