Amniota

Searched as Amniota indet.. The Paleobiology Database treats Amniota as the accepted name.

Amniotes are tetrapod vertebrate animals belonging to the clade Amniota, a large group that comprises the vast majority of living terrestrial and semiaquatic vertebrates. Amniotes evolved from amphibious stem tetrapod ancestors during the Carboniferous period. Amniota is defined as the smallest crown clade containing humans, the Greek tortoise, and the Nile crocodile. Amniotes represent a crucial evolutionary step in vertebrate history, marking the transition from aquatic to fully terrestrial life.

Amniota

User:Andrew Y. Huang User:Minette Layne Michael Allen Smith User:Haplochromis · 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
Also called
amniotePBDB
Sits inside
CotylosauriaPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB

Time the record covers

At least 269 million years on record.

The record covers at least 307.4 Mya to 37.71 Mya. No occurrence read is dated outside 309.8 Mya to 33.9 Mya.

Carboniferous — about 3 of 12 occurrencesPermian — about 3 of 12 occurrencesPermianEarly Triassic — about 0 of 12 occurrencesMiddle Triassic — about 1 of 12 occurrencesLate Triassic — about 1 of 12 occurrencesLate TriassicEarly Jurassic — about 0 of 12 occurrencesMiddle Jurassic — about 1 of 12 occurrencesLate Jurassic — about 1 of 12 occurrencesEarly Cretaceous — about 0 of 12 occurrencesLate Cretaceous — about 1 of 12 occurrencesLate CretaceousPaleocene — about 0 of 12 occurrencesEocene — about 1 of 12 occurrencesOligocene — about 0 of 12 occurrences315–306 Mya — about 1 occurrence306–296 Mya — about 2 occurrences277–267 Mya — about 2 occurrences267–258 Mya — about 1.0 occurrences248–239 Mya — about 1 occurrence229–220 Mya — about 0.4 occurrences220–210 Mya — about 0.4 occurrences210–201 Mya — about 0.2 occurrences172–162 Mya — about 0.9 occurrences162–153 Mya — about 0.1 occurrences153–143 Mya — about 1.0 occurrences143–134 Mya — about 0.0 occurrences86–76 Mya — about 0.6 occurrences76–67 Mya — about 0.4 occurrences38–28 Mya — about 1 occurrence307.4 Mya37.71 Mya315 Mya28 Mya

12 occurrences of Amniota on record, most of them in the Carboniferous. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

12 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

9 formations

Chickasha — 35.97°N, 98.32°WChickasha — 36.01°N, 98.36°WChickasha — 35.95°N, 98.22°WMorrison — 40.50°N, 109.17°WKladno — 49.71°N, 13.21°EStanton — 38.38°N, 95.26°WOtter Sandstone — 50.67°N, 3.27°WTwo Medicine — 47.63°N, 112.58°WCumnock — 35.62°N, 79.10°WBalabansai — 41.15°N, 73.47°EMattoon — 38.44°N, 87.86°W

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The named rock units Amniota has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Amniota and its relatives

Carboniferous

Where Amniota and its relatives were recorded in the Carboniferous.

Found in the same rock

2,266 taxa

The Paleobiology Database records at least 556 sites for Amniota, and this reads 240 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

10 references

Each of the 12 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 Amniota

Credit
User:Andrew Y. Huang User:Minette Layne Michael Allen Smith User:Haplochromis
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Amniota 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 itCotylosauria through timeFormations of the CarboniferousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Haeckel 1866)