Medullosa
Medullosa is an extinct genus of Pteridospermatophyta from the Late Mississippian to the Early Permian. The genus has a distribution across Europe and North America, with only two species having been found on both continents.

Ghedoghedo · CC BY-SA 4.0 · via Wikidata/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
- MedullosaceaePBDB
- Diet
- "photoautotroph"PBDB, for Streptophyta
Time the record covers
At least 4.1 million years on record.
The record covers at least 316.9 Mya to 312.8 Mya. No occurrence read is dated outside 318.7 Mya to 306 Mya.
25 occurrences of Medullosa on record, most of them in the Carboniferous. 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
25 occurrences- Carboniferous100%
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
1 formation
Loading coastlines…
The named rock units Medullosa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 occurrences have no formation on record, which is common for older literature.
Medullosa and its relatives
CarboniferousWhere Medullosa and its relatives were recorded in the Carboniferous.
Found in the same rock
79 taxa- Lepidophloios18 sites
- Sphenophyllum17 sites
- Arthropitys16 sites
- Anachoropteris14 sites
- Lepidodendraceae13 sites
- Paralycopodites12 sites
- Psaronius12 sites
- Heterangium11 sites
- Lepidodendron10 sites
- Synchysidendron resinosum8 sites
- Amyelon radicans7 sites
- Botryopteris7 sites
- Calamodendron7 sites
- Cordaites7 sites
- Diaphorodendron vasculare7 sites
- Etapteris7 sites
- Lepidocarpon7 sites
- Lyginopteris oldhamia7 sites
- Myeloxylon7 sites
- Ankyropteris6 sites
- Bowmanites6 sites
- Calamostachys6 sites
- Hizemodendron serratum6 sites
- Lepidostrobus6 sites
The Paleobiology Database records 23 sites for Medullosa, and this reads all 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
2 references- A Transect through a Clastic-swamp to Peat-swamp Ecotene in the Springfield Coal, Middle Pennsylvanian Age of Indiana, USA16
- Coal-ball floras of the Namurian-Westphalian of Europe9
Each of the 25 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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1

Picture of Medullosa
- Source
- Wikidata/Commons
- Credit
- Ghedoghedo
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Medullosa was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Medullosa”
- 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 itMedullosaceae through timeFormations of the CarboniferousThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Cotta 1832