Protosirenidae
Protosirenidae is an extinct primitive family of the order Sirenia.

Conty · 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
- SireniaPBDB
- Diet
- herbivorePBDB, for Sirenia
- Life habit
- aquaticPBDB, for Sirenia
- Motility
- actively mobilePBDB, for Osteichthyes
- Environment
- marinePBDB, for Sirenia
Time the record covers
At least 10 million years on record.
The record covers at least 48.07 Mya to 37.71 Mya. No occurrence read is dated outside 56 Mya to 33.9 Mya.
31 occurrences of Protosirenidae 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
31 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
17 formations
- Tupelo Bay Formation3
- Drazinda Formation2
- Harudi Formation2
- Avon Park Formation2
- Inglis Formation2
- Castle Hayne Formation2
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The named rock units Protosirenidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.
Protosirenidae and its relatives
EoceneWhere Protosirenidae and its relatives were recorded in the Eocene.
Found in the same rock
255 taxa- Protosiren12 sites
- Basilosauridae4 sites
- Basilosaurus4 sites
- Protosiren smithae4 sites
- Eotheroides3 sites
- Galeorhinus3 sites
- Myliobatis3 sites
- Physogaleus3 sites
- Protocetidae3 sites
- Protosiren fraasi3 sites
- Rhinoptera3 sites
- Abdounia2 sites
- Anthozoa2 sites
- Carcharias2 sites
- Cetacea2 sites
- Crocodylia2 sites
- Dasyatis2 sites
- Dermochelyidae2 sites
- Dugongidae2 sites
- Foraminifera2 sites
- Galeocerdo eaglesomei2 sites
- Galeocerdo latidens2 sites
- Gastropoda2 sites
- Isurus praecursor2 sites
The Paleobiology Database records 30 sites for Protosirenidae, 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
23 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
- New protosirenid (Mammalia, Sirenia) in the late Eocene sea cow assemblage of southwestern Morocco1
- Cenozoic vertebrate biostratigraphy of South Carolina, U.S.A. and additions to the fauna1
- Recently discovered basilosaurid, baluchithere rhinoceros, horses, sea cow, proboscidean, eucrocodile, pterosaurs, plesiosaur, fishes, invertebrates and wood fossils, tracks and trackways of dinosaurs from Pakistan; comparison of recognized four titanosaur taxa of Indo-Pakistan with Madagascar1
- The middle-upper Eocene Vertebrate record from Taraya-Laayoune-Dakhla Antlantic Basin (Morocco)1
- Libysiren sickenbergi, gen. et sp. nov.: a new sirenian (Mammalia, Protosirenidae) from the middle Eocene of Libya1
- A new archaeocete and other marine mammals (Cetacea and Sirenia) from lower middle Eocene phosphate deposits of Togo1
- 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
- A new middle Eocene sirenian (Mammalia, Protosirenidae) from India1
Each of the 31 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. 11 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 content1

Picture of Protosirenidae
- Source
- Wikidata/Commons
- Credit
- Conty
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Protosirenidae 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
- 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 itSirenia through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Sickenberg 1934)