Mesocetus

Uncredited · 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
- TranatocetidaePBDB
- Diet
- carnivore, suspension feederPBDB, for Mysticeti
- Life habit
- aquaticPBDB, for Mysticeti
- Motility
- actively mobilePBDB, for Cetacea
- Environment
- marinePBDB, for Mysticeti
Time the record covers
At least 34 million years on record.
The record covers at least 37.71 Mya to 3.6 Mya. No occurrence read is dated outside 41.03 Mya to 774 ka.
39 occurrences of Mesocetus on record, most of them in the Miocene. 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
39 occurrences- Eocene13%
- Miocene82%
- Pliocene4%
- Pleistoceneunder 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
10 formations
- Calvert Formation · Chesapeake Group8
- Sables d'Anvers Formation3
- Groote Heide Formation3
- Aridal Formation3
- Studienka Formation2
- Choptank Formation · Chesapeake Group2
Loading coastlines…
The named rock units Mesocetus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 occurrences have no formation on record, which is common for older literature.
Mesocetus and its relatives
MioceneWhere Mesocetus and its relatives were recorded in the Miocene.
Found in the same rock
370 taxa- Odontoceti11 sites
- Carcharhinus5 sites
- Phocidae5 sites
- Kentriodon4 sites
- Leptophoca lenis4 sites
- Mysticeti4 sites
- Otodus megalodon4 sites
- Testudines4 sites
- Acer3 sites
- Albula3 sites
- Alnus3 sites
- Balaenula balaenopsis3 sites
- Carya3 sites
- Castanea3 sites
- Cicuta3 sites
- Corylus3 sites
- Cyperaceae3 sites
- Dasyatis3 sites
- Eocetus schweinfurthi3 sites
- Ilex3 sites
- Juglans3 sites
- Lagodon rhomboides3 sites
- Liquidambar3 sites
- Manikara sp.3 sites
The Paleobiology Database records 32 sites for Mesocetus, 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
25 references- USNM Chesapeake Group Cetacean Collection Data5
- Mesocetus aff. agrami (Mysticeti, Cetotheriidae) iz srednjomicenskih naslaga sjeverne bosne4
- Geology and biostratigraphy of the Potomac River Cliffs at Stratford Hall, Westmoreland County, Virginia3
- The oldest Eocene marine vertebrate fauna from the Sahara Desert in Southwestern Morocco2
- The Kor & Bot collection revisited, with a biostratigraphic interpretation of the Early Pleistocene Oosterschelde Fauna (Oosterschelde Estuary, the Netherlands)2
- Temporal and spatial distribution of Miocene mammals in the western Carpatians (Slovakia)2
- On fossil Cetacea and Pinnipedia in the Netherlands2
- Not sure les Cetaces fossiles de l Aquitaine2
- A new platyrostrine sperm whale from the Early Miocene of the southeastern Pacific (East Pisco Basin, Peru) supports affinities with the southwestern Atlantic cetacean fauna1
- Taphonomy and palaeoecology of the lower Miocene marine vertebrate assemblage of Ullujaya (Chilcatay Formation, East Pisco Basin, southernPeru)1
- New fauna of archaeocete whales (Mammalia, Cetacea) from the Bartonian middle Eocene of southern Morocco1
- "Double-headed" ribs in a Miocene whale1
Each of the 39 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. 13 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 Mesocetus
- Source
- Wikidata/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 Mesocetus 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itTranatocetidae through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Van Beneden 1880