Opisthoproctus

Opisthoproctus soleatus is an argentiniform species of fish referred to as the barreleye, being the type genus and species of the family Opisthoproctidae. The species lives in most tropical seas, but is more common in the eastern Atlantic, from western Ireland to Mauritania and from Sierra Leone to Angola, and also in the South China Sea. O. soleatus can grow to a standard length of 10.5 centimetres (4.1 in) and usually live from about 500 to 700 metres deep.

Opisthoproctus

S. Johnsen (Duke Uni.) for courtesy of photos, J. Hlidberg for courtesy of illustrations, K. and E. Hjørne for help w… · CC BY 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
Sits inside
OsmeriformesPBDB
Diet
carnivorePBDB, for Osmeriformes
Life habit
nektonicPBDB, for Osmeriformes
Motility
actively mobilePBDB, for Osmeriformes
Environment
freshwaterPBDB, for Osmeriformes

Time the record covers

At least 13 million years on record.

The record covers at least 41.03 Mya to 27.3 Mya. No occurrence read is dated outside 48.07 Mya to 23.04 Mya.

Eocene — about 5 of 7 occurrencesEoceneOligocene — about 2 of 7 occurrencesOligoceneMiocene — about 0 of 7 occurrences49–48 Mya — about 0.3 occurrences48–47 Mya — about 0.6 occurrences47–46 Mya — about 0.6 occurrences46–45 Mya — about 0.6 occurrences45–44 Mya — about 0.6 occurrences44–43 Mya — about 0.6 occurrences43–42 Mya — about 0.6 occurrences42–42 Mya — about 0.6 occurrences42–41 Mya — about 0.4 occurrences28–27 Mya — about 0.2 occurrences27–26 Mya — about 0.4 occurrences26–25 Mya — about 0.4 occurrences25–24 Mya — about 0.4 occurrences24–23 Mya — about 0.4 occurrences23–23 Mya — about 0.2 occurrences41.03 Mya27.3 Mya48.6 Mya22.5 Mya

7 occurrences of Opisthoproctus on record, most of them in the Eocene. 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

7 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

2 formations

Miretrain Marl — 43.56°N, 1.11°WDonzacq Marl — 43.75°N, 0.84°W

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The named rock units Opisthoproctus 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.

Opisthoproctus and its relatives

Eocene

Where Opisthoproctus and its relatives were recorded in the Eocene.

Found in the same rock

132 taxa

The Paleobiology Database records 5 sites for Opisthoproctus, 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

2 references

Each of the 7 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 content1

Picture of Opisthoproctus

Credit
S. Johnsen (Duke Uni.) for courtesy of photos, J. Hlidberg for courtesy of illustrations, K. and E. Hjørne for help w…
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Opisthoproctus 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 itOsmeriformes through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Vaillant 1888