Medusaegraptus
Medusagraptus is a genus of dasycladalean green alga.

Uncredited · 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
- SeletonellaceaePBDB
- Diet
- "photoautotroph"PBDB, for Dasycladales
- Life habit
- epifaunalPBDB, for Dasycladales
- Motility
- stationaryPBDB, for Dasycladales
- Environment
- coastal,inner shelf,oligotrophic,hypersaline,marine,brackishPBDB, for Dasycladales
Time the record covers
At least 27 million years on record.
The record covers at least 449.9 Mya to 422.7 Mya. No occurrence read is dated outside 452.8 Mya to 419.62 Mya.
7 occurrences of Medusaegraptus on record, most of them in the Silurian. 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
7 occurrences- Ordovician14%
- Silurian86%
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
5 formations
- Syracuse Formation · Salina Group3
- Fiddlers Green Formation · Bertie Group1
- Akron Formation1
- Bertie Formation1
- Varlyginskaya Formation1
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The named rock units Medusaegraptus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Medusaegraptus and its relatives
SilurianWhere Medusaegraptus and its relatives were recorded in the Silurian.
Found in the same rock
133 taxa- Camarotoechia5 sites
- Leperditia5 sites
- Orbiculoidea5 sites
- Lingula4 sites
- Carcinosoma3 sites
- Eurypterus remipes3 sites
- Hercynella3 sites
- Howellella3 sites
- Nuculites3 sites
- Orthoceras3 sites
- Pristeroceras3 sites
- Pterygotus3 sites
- Whitfieldella3 sites
- Acutiramus macrophthalmus2 sites
- Ascograptus2 sites
- Bivalvia2 sites
- Calymene2 sites
- Cephalopoda2 sites
- Ceratiocaris2 sites
- Climacograptus2 sites
- Delthyris2 sites
- Dolichopterus2 sites
- Erieopterus2 sites
- Eurypterus2 sites
The Paleobiology Database records 7 sites for Medusaegraptus, 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
5 references- Habitat of Llandoverian-Lochkovian eurypterids2
- Stratigraphy of Upper Silurian Cayugan Evaporites2
- Legend of the Central European series of sheets of the State Geological Map of the Russian Federation, scale 1:1,000,000 (third generation)1
- Geology of Erie County, New York1
- Faunal stratigraphy of Syracuse Formation, Onondaga and Madison Counties, New York1
Each of the 7 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. 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 content1
Picture of Medusaegraptus
- Source
- Wikipedia/Commons
- Credit
- nobody named on the record
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
No 3D scan of Medusaegraptus was found in MorphoSource and Sketchfab.
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- 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 itSeletonellaceae through timeFormations of the SilurianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Ruedemann 1925