Annularia
Annularia is a form taxon, applied to fossil foliage belonging to extinct plants of the genus Calamites in the order Equisetales.

Woudloper · Public Domain · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- EquisetalesPBDB
- Diet
- "photoautotroph"PBDB, for Streptophyta
Time the record covers
At least 71 million years on record.
The record covers at least 323.4 Mya to 251.902 Mya. No occurrence read is dated outside 358.86 Mya to 247 Mya.
399 occurrences of Annularia on record, most of them in the Permian. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
399 occurrences- Carboniferous31%
- Permian69%
- Early Triassicunder 1%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
116 formations
- Pottsville Formation22
- Shanxi Formation18
- Manebacher Formation10
- Taiyuan Formation10
- Lawrence Shale Formation7
- Goldlauterer Formation7
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The named rock units Annularia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 92 further formations hold fewer occurrences each and are not listed. 155 occurrences have no formation on record, which is common for older literature.
Annularia and its relatives
PermianWhere Annularia and its relatives were recorded in the Permian.
Found in the same rock
595 taxa- Pecopteris177 sites
- Sphenophyllum133 sites
- Cordaites110 sites
- Neuropteris102 sites
- Sphenopteris98 sites
- Taeniopteris92 sites
- Odontopteris78 sites
- Pecopteris (Alethopteris)74 sites
- Calamites73 sites
- Asterophyllites64 sites
- Lobatannularia56 sites
- Callipteris54 sites
- Lepidodendron48 sites
- Samaropsis47 sites
- Callipteridium43 sites
- Paracalamites39 sites
- Phyllotheca37 sites
- Noeggerathiopsis36 sites
- Walchia33 sites
- Callipteris conferta30 sites
- Sigillaria30 sites
- Lebachia29 sites
- Compsopteris27 sites
- Crassinervia27 sites
The Paleobiology Database records 246 sites for Annularia, and this reads 240 of them. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
111 references- Stratigraphische Grundlagen des Stefan C und Rotliegenden im Thuringer Wald31
- Kompleksy rasteniy; sporovo-pyl'tsevyye kompleksy31
- Contribution a l'etude des flores Autuno-Stephaniennes19
- Regional Geology of Hebei Province, Beijing Municipality and Tianjing Municipality14
- A paleontological study of an Early Pennsylvanian forest preserved above the Blue Creek Coal seam, Pottsville, Formation, Northwestern Alabama12
- Flora of Pennsylvanian Pictou Group of New Brunswick12
- A paleoecological study of an in situ peat-forming Carboniferous forest in the Black Warrior Basin, Alabama10
- The Stratigraphic Tables of Ningxia10
- Regional Geology of Gansu Province9
- Geology of Korea9
- The Carboniferous and Permian Stratigraphy of Mongolia on the Basis of Palaeobotanical Data8
- Regional Geology of Guangdong Province7
Each of the 399 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 99 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content2
Picture of Annularia
- Source
- Wikipedia/Commons
- Credit
- Woudloper
- Licence
- Public Domain
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC0 Public Domain
- Commercial use
- the licence allows it
The description on this site
- Source
- Wikipedia, “Annularia”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itEquisetales through timeFormations of the PermianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Sternberg 1821