Andreolepis hedei

Andreolepis is an extinct genus of prehistoric fish, which lived around 420 million years ago. It was described by Walter Gross in 1968 based on scales found in the Hemse Formation in Gotland, Sweden. It is placed in the monogeneric family Andreolepididae and is generally regarded as a primitive member of the class Actinopterygii based on its ganoid scale structure; however some new research regards it as a stem group of osteichthyans.

Andreolepis hedei

Märss · CC BY-NC 4.0 · via GBIF. 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
AndreolepisPBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At most 4 million years on record.

Every occurrence read is dated to somewhere between 426.7 Mya and 422.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Silurian — about 5 of 5 occurrencesSilurian427–427 Mya — about 0.1 occurrences427–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–426 Mya — about 0.1 occurrences426–425 Mya — about 0.1 occurrences425–425 Mya — about 0.1 occurrences425–425 Mya — about 0.1 occurrences425–425 Mya — about 0.2 occurrences425–425 Mya — about 0.2 occurrences425–425 Mya — about 0.2 occurrences425–424 Mya — about 0.2 occurrences424–424 Mya — about 0.2 occurrences424–424 Mya — about 0.2 occurrences424–424 Mya — about 0.2 occurrences424–424 Mya — about 0.2 occurrences424–424 Mya — about 0.2 occurrences424–423 Mya — about 0.2 occurrences423–423 Mya — about 0.2 occurrences423–423 Mya — about 0.2 occurrences423–423 Mya — about 0.6 occurrences423–423 Mya — about 0.7 occurrences427.2 Mya422.2 Mya

5 occurrences of Andreolepis hedei on record, most of them in the Silurian. 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.

Found in

4 formations

Hemse Beds — 57.28°N, 18.62°EHimmiste — 59.07°N, 24.79°EWest Khatanzeya — 71.00°N, 58.00°EVelikoretskaya — 67.59°N, 49.12°E

Loading coastlines…

The named rock units Andreolepis hedei 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.

Andreolepis hedei and its relatives

Silurian

Where Andreolepis hedei and its relatives were recorded in the Silurian.

Found in the same rock

45 taxa

The Paleobiology Database records 5 sites for Andreolepis hedei, 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

4 references

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. 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 Andreolepis hedei

Source
GBIF
Credit
Märss
Licence
CC BY-NC 4.0
Commercial use
the licence does not allow it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itAndreolepis through timeFormations of the SilurianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gross 1968