Amphilestidae

Amphilestidae is a family of Mesozoic mammals, generally regarded as eutriconodonts. They may form a paraphyletic or polyphyletic assemblage, though they share with gobiconodontids their similar tooth occlusion patterns and may be especially closely related to them. They occur from the Middle Jurassic to Cenomanian, and have a distribution across Laurasia.

Amphilestidae

via iDigBio · CC BY · via iDigBio. 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
TheriamorphaPBDB
Diet
carnivorePBDB
Life habit
ground dwellingPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Mammalia

Time the record covers

At least 43 million years on record.

The record covers at least 165.3 Mya to 121.4 Mya. No occurrence read is dated outside 201.4 Mya to 113.2 Mya.

Late Triassic — about 0 of 16 occurrencesEarly Jurassic — about 0 of 16 occurrencesEarly JurassicMiddle Jurassic — about 8 of 16 occurrencesMiddle JurassicLate Jurassic — about 4 of 16 occurrencesLate JurassicEarly Cretaceous — about 4 of 16 occurrencesEarly Cretaceous203–200 Mya — about 0.0 occurrences200–197 Mya — about 0.1 occurrences197–194 Mya — about 0.1 occurrences194–191 Mya — about 0.1 occurrences191–188 Mya — about 0.1 occurrences188–185 Mya — about 0.1 occurrences185–182 Mya — about 0.1 occurrences182–179 Mya — about 0.1 occurrences179–176 Mya — about 0.1 occurrences176–173 Mya — about 0.2 occurrences173–170 Mya — about 0.3 occurrences170–166 Mya — about 4 occurrences166–163 Mya — about 3 occurrences163–160 Mya — about 0.7 occurrences160–157 Mya — about 0.1 occurrences157–154 Mya — about 0.1 occurrences154–151 Mya — about 0.9 occurrences151–148 Mya — about 1 occurrence148–145 Mya — about 0.6 occurrences145–142 Mya — about 1 occurrence142–139 Mya — about 0.2 occurrences127–124 Mya — about 0.3 occurrences124–121 Mya — about 0.6 occurrences121–118 Mya — about 0.9 occurrences118–114 Mya — about 0.9 occurrences114–111 Mya — about 0.4 occurrences165.3 Mya121.4 Mya203 Mya111 Mya

16 occurrences of Amphilestidae on record, most of them in the Middle Jurassic. 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

16 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

Ilek — 55.90°N, 87.96°EIlek — 56.53°N, 91.81°EMorrison — 41.89°N, 106.00°WTaynton Limestone — 51.85°N, 1.43°WWhite Limestone — 51.75°N, 1.17°WJiulongshan — 41.00°N, 119.00°EKsar Metlili — 32.70°N, 3.22°WBalabansai — 41.34°N, 72.23°ETendaguru — 9.68°S, 39.22°EForest Marble — 50.71°N, 2.78°W

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The named rock units Amphilestidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Amphilestidae and its relatives

Middle Jurassic

Where Amphilestidae and its relatives were recorded in the Middle Jurassic.

Found in the same rock

296 taxa

The Paleobiology Database records 12 sites for Amphilestidae, 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

10 references

Each of the 16 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 Amphilestidae

Source
iDigBio
Credit
via iDigBio
Licence
CC BY
Commercial use
the licence allows it

No 3D scan of Amphilestidae 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 itTheriamorpha through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Osborn 1888)