Hemirhabdorhynchus

Hemirhabdorhynchus is an extinct genus of prehistoric marine ray-finned fish, presumed to be an early billfish, that lived from the early to middle Eocene of Europe & Africa. It is known only from fragmentary remains of rostra, and thus its exact taxonomic position is uncertain. Under some previous taxonomic treatments, it was considered an ancestor of the modern Tetrapturus.

No picture of Hemirhabdorhynchus was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Hemirhabdorhynchus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
IstiophoridaePBDB
Motility
actively mobilePBDB, for Osteichthyes

Time the record covers

At least 25 million years on record.

The record covers at least 48.07 Mya to 23.04 Mya. No occurrence read is dated outside 56 Mya to 13.82 Mya.

Paleocene — about 0 of 4 occurrencesEocene — about 3 of 4 occurrencesEoceneOligocene — about 0 of 4 occurrencesMiocene — about 1 of 4 occurrencesMiocene57–55 Mya — about 0.2 occurrences55–54 Mya — about 0.6 occurrences54–52 Mya — about 0.6 occurrences52–51 Mya — about 0.6 occurrences51–50 Mya — about 0.6 occurrences50–48 Mya — about 0.6 occurrences23–22 Mya — about 0.1 occurrences22–20 Mya — about 0.2 occurrences20–19 Mya — about 0.2 occurrences19–17 Mya — about 0.2 occurrences17–16 Mya — about 0.2 occurrences16–14 Mya — about 0.2 occurrences14–13 Mya — about 0.1 occurrences48.07 Mya23.04 Mya56.8 Mya13 Mya

4 occurrences of Hemirhabdorhynchus on record, most of them in the Eocene. 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

4 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

Pungo River — 35.40°N, 76.80°WLondon Clay — 51.40°N, 0.83°E

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The named rock units Hemirhabdorhynchus 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.

Hemirhabdorhynchus and its relatives

Eocene

Where Hemirhabdorhynchus and its relatives were recorded in the Eocene.

Found in the same rock

352 taxa

The Paleobiology Database records 3 sites for Hemirhabdorhynchus, 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

3 references

Each of the 4 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 content0

No picture of Hemirhabdorhynchus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Hemirhabdorhynchus, or no answer at all. This entry cannot say which.

No 3D scan of Hemirhabdorhynchus 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 itIstiophoridae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Casier 1946