Protosiren
Protosiren is an extinct early genus of the order Sirenia. Protosiren existed throughout the Lutetian to Priabonian stages of the Middle Eocene. Fossils have been found in the far-flung locations like the United States, Africa (Egypt), Europe and Asia.

Jonathan Chen · CC BY-SA 4.0 · 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
- ProtosirenidaePBDB
- Diet
- herbivorePBDB, for Sirenia
- Life habit
- aquaticPBDB, for Sirenia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- marinePBDB, for Sirenia
Time the record covers
At least 3.3 million years on record.
The record covers at least 41.03 Mya to 37.71 Mya. No occurrence read is dated outside 48.07 Mya to 33.9 Mya.
23 occurrences of Protosiren on record, most of them in the Eocene. 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
23 occurrences- Eocene100%
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
13 formations
- Drazinda Formation2
- Avon Park Formation2
- Inglis Formation2
- Castle Hayne Formation2
- Tupelo Bay Formation2
- Birket Qarun Formation2
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The named rock units Protosiren has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.
Protosiren and its relatives
EoceneWhere Protosiren and its relatives were recorded in the Eocene.
Found in the same rock
161 taxa- Anthozoa2 sites
- Basilosauridae2 sites
- Basilosaurus2 sites
- Cetacea2 sites
- Crocodylia2 sites
- Eotheroides2 sites
- Gastropoda2 sites
- Linthia hanoverensis2 sites
- Periarchus lyelli2 sites
- Sirenia2 sites
- Striatolamia macrota2 sites
- Velates perversus2 sites
- Aequipecten1 site
- Agassizia clevei1 site
- Agassizia wilmingtonensis wilmingtonensis1 site
- Agnocardia claibornense1 site
- Andrewsiphius sloani1 site
- Anomotodon1 site
- Anomotodon novus1 site
- Archaeoceti1 site
- Argyrotheca laevis1 site
- Arius1 site
- Artiocetus clavis1 site
- Asteroidea indet.1 site
The Paleobiology Database records 22 sites for Protosiren, 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
15 references- North American Eocene sea cows (Mammalia: Sirenia)6
- Late Eocene sea cows (Mammalia, Sirenia) from Wadi al Hitan in the western desert of Fayum, Egypt4
- Cenozoic vertebrate biostratigraphy of South Carolina, U.S.A. and additions to the fauna1
- The most northerly record of the sirenian Protosiren and the possible polyphyletic evolution of manatees and dugongs1
- A stratigraphically precise record of Protosiren (Protosirenidae, Sirenia) from North America1
- Sirenia1
- Eocene and Oligocene sirenians (Mammalia) from Kachchh, India1
- New species of Protosiren (Mammalia, Sirenia) from the early middle Eocene of Balochistan (Pakistan)1
- Eocene sea cows (Sirenia, Mammalia) from Hungary1
- Eocene stratrigraphy and archaeocete whales (Mammalia, Cetacea) of Drug Lahar in the eastern Sulaiman range, Balochistan (Pakistan)1
- Protosiren and Babiacetus (Mammalia, Sirenia and Cetacea) from the middle Eocene Drazinda Formation, Sulaiman Range, Punjab, Pakistan1
- Protosiren smithae, new species (Mammalia, Sirenia), from the Late Middle Eocene of Wadi Hitan, Egypt1
Each of the 23 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. 3 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 Protosiren
- Source
- Wikipedia/Commons
- Credit
- Jonathan Chen
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- APEX UniLaSalle
- Licence
- CC Attribution-NonCommercial-ShareAlike
- Commercial use
- the licence does not allow it
The description on this site
- Source
- Wikipedia, “Protosiren”
- 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 itProtosirenidae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Abel 1904