Amaltheus

Searched as Amaltheus stokesi typica. The Paleobiology Database treats Amaltheus as the accepted name.

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 most 8.7 million years on record.

Every occurrence read is dated to somewhere between 192.9 Mya and 184.2 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Early Jurassic — about 5 of 5 occurrencesEarly Jurassic193–193 Mya — about 0.1 occurrences193–192 Mya — about 0.2 occurrences192–192 Mya — about 0.2 occurrences192–192 Mya — about 0.2 occurrences192–191 Mya — about 0.2 occurrences191–191 Mya — about 0.2 occurrences191–191 Mya — about 0.2 occurrences191–190 Mya — about 0.2 occurrences190–190 Mya — about 0.2 occurrences190–190 Mya — about 0.2 occurrences190–190 Mya — about 0.2 occurrences190–189 Mya — about 0.2 occurrences189–189 Mya — about 0.2 occurrences189–189 Mya — about 0.2 occurrences189–188 Mya — about 0.2 occurrences188–188 Mya — about 0.2 occurrences188–188 Mya — about 0.2 occurrences188–187 Mya — about 0.2 occurrences187–187 Mya — about 0.2 occurrences187–187 Mya — about 0.2 occurrences187–186 Mya — about 0.2 occurrences186–186 Mya — about 0.2 occurrences186–186 Mya — about 0.2 occurrences186–185 Mya — about 0.2 occurrences185–185 Mya — about 0.2 occurrences185–185 Mya — about 0.2 occurrences185–184 Mya — about 0.2 occurrences184–184 Mya — about 0.1 occurrences193.4 Mya183.7 Mya

5 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

5 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.

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

1 reference

Each of the 5 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. Each entry links to doi.org. 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)