Alligator olseni

Alligator olseni is an extinct species of alligator. They lived in the Early Miocene period, around 20.4–15.97 million years ago and possibly earlier. Their range was principally in what is now known as Florida, United States, and possibly extending into southeastern Texas. It is a small alligator with an estimated body length of 2.6 metres (8.5 ft).

Alligator olseni

Geekgecko · CC BY 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
AlligatorPBDB
Diet
carnivorePBDB, for Crocodylia
Motility
actively mobilePBDB, for Osteichthyes
Environment
marinePBDB, for Mesoeucrocodylia

Time the record covers

At least 1.9 million years on record.

The record covers at least 20.45 Mya to 18.5 Mya. No occurrence read is dated outside 23.04 Mya to 15.98 Mya.

Oligocene — about 0 of 4 occurrencesMiocene — about 4 of 4 occurrencesMiocene23–23 Mya — about 0.0 occurrences23–23 Mya — about 0.1 occurrences23–22 Mya — about 0.1 occurrences22–22 Mya — about 0.1 occurrences22–22 Mya — about 0.1 occurrences22–22 Mya — about 0.1 occurrences22–21 Mya — about 0.1 occurrences21–21 Mya — about 0.1 occurrences21–21 Mya — about 0.1 occurrences21–21 Mya — about 0.1 occurrences21–20 Mya — about 0.1 occurrences20–20 Mya — about 0.0 occurrences20–20 Mya — about 0.0 occurrences20–20 Mya — about 0.0 occurrences20–19 Mya — about 0.0 occurrences19–19 Mya — about 0.0 occurrences19–19 Mya — about 0.0 occurrences19–18 Mya — about 0.1 occurrences18–18 Mya — about 0.3 occurrences18–18 Mya — about 0.3 occurrences18–18 Mya — about 0.3 occurrences18–17 Mya — about 0.3 occurrences17–17 Mya — about 0.3 occurrences17–17 Mya — about 0.3 occurrences17–17 Mya — about 0.3 occurrences17–16 Mya — about 0.3 occurrences16–16 Mya — about 0.0 occurrences16–16 Mya — about 0.0 occurrences20.45 Mya18.5 Mya23.5 Mya15.5 Mya

4 occurrences of Alligator olseni 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

4 occurrences

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

3 formations

Torreya — 30.61°N, 84.25°WTorreya — 30.50°N, 84.50°WFleming — 31.00°N, 93.40°WAlachua — 29.70°N, 82.60°W

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The named rock units Alligator olseni has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Alligator olseni and its relatives

Miocene

Where Alligator olseni and its relatives were recorded in the Miocene.

Found in the same rock

122 taxa

The Paleobiology Database records 4 sites for Alligator olseni, 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

3 references

Each of the 4 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 Alligator olseni

Credit
Geekgecko
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Alligator olseni 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 itAlligator through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. White 1942