Amaltheus

Amaltheus is an oxyconic ammonite with a fairly open umbilicus, serrated keel, and slightly sigmoidal ribs from the Lower Jurassic, many of which are strigate. Amaltheus, named by de Montfort, 1808, is indicative of the upper Pliensbachian stage in Europe, north Africa, Caucasus, Siberia, N. Alaska, Canada, Oregon, and possibly Honduras; and is the type for the Amaltheidae and a member of the Eoderoceratoidea.

Amaltheus

BerndH · CC BY-SA 3.0 · 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
AmaltheinaePBDB
Diet
carnivorePBDB, for Ammonoidea
Life habit
nektonicPBDB, for Ammonoidea
Motility
fast-movingPBDB, for Ammonoidea
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 700 thousand years on record.

The record covers at least 184.2 Mya to 183.5 Mya. No occurrence read is dated outside 201.4 Mya to 174.7 Mya.

Late Triassic — about 0 of 258 occurrencesEarly Jurassic — about 258 of 258 occurrencesEarly JurassicMiddle Jurassic — about 0 of 258 occurrences202–201 Mya — about 0.1 occurrences201–200 Mya — about 0.2 occurrences200–199 Mya — about 0.2 occurrences199–198 Mya — about 0.2 occurrences198–197 Mya — about 0.2 occurrences197–196 Mya — about 0.2 occurrences196–195 Mya — about 0.2 occurrences195–195 Mya — about 0.2 occurrences195–194 Mya — about 0.2 occurrences194–193 Mya — about 6 occurrences193–192 Mya — about 26 occurrences192–191 Mya — about 26 occurrences191–190 Mya — about 26 occurrences190–189 Mya — about 26 occurrences189–188 Mya — about 26 occurrences188–187 Mya — about 26 occurrences187–186 Mya — about 26 occurrences186–185 Mya — about 26 occurrences185–184 Mya — about 32 occurrences184–183 Mya — about 11 occurrences183–182 Mya — about 1.0 occurrences182–182 Mya — about 0.3 occurrences182–181 Mya — about 0.2 occurrences181–180 Mya — about 0.2 occurrences180–179 Mya — about 0.2 occurrences179–178 Mya — about 0.2 occurrences178–177 Mya — about 0.2 occurrences177–176 Mya — about 0.2 occurrences176–175 Mya — about 0.2 occurrences175–174 Mya — about 0.1 occurrences184.2 Mya – 183.5 Mya201.9 Mya174.2 Mya

258 occurrences of Amaltheus on record, most of them in the Early 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

258 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

22 formations

Scalpa Sandstone — 57.38°N, 6.00°WTeradani — 36.93°N, 137.68°EInklin — 59.33°N, 133.72°WInklin — 59.30°N, 133.97°WInklin — 59.30°N, 133.92°WInklin — 59.42°N, 134.00°WKingak — 68.30°N, 137.70°WKingak — 68.05°N, 138.07°WKingak — 68.32°N, 137.78°WIsztimér — 47.19°N, 17.90°EIsztimér — 47.28°N, 17.84°EAllgäu — 47.14°N, 9.84°EAllgäu — 47.17°N, 10.04°EAllgäu — 47.25°N, 10.12°EFannin — 53.38°N, 132.27°WFannin — 53.20°N, 132.05°WMarnes de Villeneuve — 43.85°N, 3.12°ECleveland Ironstone — 54.26°N, 1.28°WFernie — 52.27°N, 113.80°WFernie — 51.08°N, 114.08°WAmaltheus Clay — 52.07°N, 10.85°EMiddle Lias — 51.80°N, 1.88°WCamino — 43.05°N, 4.07°WTiglukpuk — 68.87°N, 148.23°WAlmstrom Creek — 67.40°N, 138.47°WTakwahoni — 58.18°N, 128.98°WTűzkövesárok Limestone — 47.28°N, 18.08°ETalkeetna — 61.84°N, 147.43°WBarahona — 41.29°N, 0.79°WHigashinagano — 34.15°N, 131.05°ENishinakayama — 34.16°N, 131.06°EAmaltheenton — 49.35°N, 11.36°E

Loading coastlines…

The named rock units Amaltheus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 174 occurrences have no formation on record, which is common for older literature.

Amaltheus and its relatives

Early Jurassic

Where Amaltheus and its relatives were recorded in the Early Jurassic.

Found in the same rock

328 taxa

The Paleobiology Database records 165 sites for Amaltheus, 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

40 references

Each of the 258 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. 28 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 content2

Picture of Amaltheus

Credit
BerndH
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itAmaltheinae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (de Montfort 1808)