Leptorhynchos

Leptorhynchos is an extinct genus of caenagnathid theropod from the Late Cretaceous of what is now the US state of Texas, although it has been suggested to also exist in Alberta and South Dakota. The type species is L. gaddisi, and it is currently the only widely accepted valid species. The generic name of Leptorhynchos comes from the Greek "leptos" meaning "small" and "rhynchos" meaning "beak". The specific epithet is in honor of the Gaddis family, who owned the land on which the holotype was discovered.

Leptorhynchos

Uncredited · 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
CaenagnathidaePBDB
Diet
omnivorePBDB, for Oviraptorosauria
Life habit
ground dwelling, depth=surfacePBDB, for Oviraptorosauria
Motility
actively mobilePBDB, for Oviraptorosauria
Environment
terrestrialPBDB, for Oviraptorosauria

Time the record covers

At most 18 million years on record.

Every occurrence read is dated to somewhere between 83.6 Mya and 66 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Late Cretaceous — about 10 of 10 occurrencesLate CretaceousPaleocene — about 0 of 10 occurrences84–83 Mya — about 0.1 occurrences83–83 Mya — about 0.4 occurrences83–82 Mya — about 0.4 occurrences82–82 Mya — about 0.4 occurrences82–81 Mya — about 0.4 occurrences81–80 Mya — about 0.4 occurrences80–80 Mya — about 0.4 occurrences80–79 Mya — about 0.4 occurrences79–79 Mya — about 0.4 occurrences79–78 Mya — about 0.4 occurrences78–77 Mya — about 0.4 occurrences77–77 Mya — about 0.4 occurrences77–76 Mya — about 0.4 occurrences76–75 Mya — about 0.4 occurrences75–75 Mya — about 0.4 occurrences75–74 Mya — about 0.4 occurrences74–74 Mya — about 0.4 occurrences74–73 Mya — about 0.4 occurrences73–72 Mya — about 0.4 occurrences72–72 Mya — about 0.2 occurrences72–71 Mya — about 0.2 occurrences71–70 Mya — about 0.2 occurrences70–70 Mya — about 0.2 occurrences70–69 Mya — about 0.2 occurrences69–69 Mya — about 0.2 occurrences69–68 Mya — about 0.2 occurrences68–67 Mya — about 0.2 occurrences67–67 Mya — about 0.2 occurrences67–66 Mya — about 0.2 occurrences66–66 Mya — about 0.0 occurrences84.1 Mya65.5 Mya

10 occurrences of Leptorhynchos on record, most of them in the Late Cretaceous. 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

10 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

Dinosaur Park — 50.74°N, 111.49°WDinosaur Park — 50.70°N, 111.27°WDinosaur Park — 50.81°N, 111.63°WAguja — 29.32°N, 103.52°WFrenchman — 49.52°N, 108.82°WFrenchman — 50.21°N, 107.37°WTwo Medicine — 48.94°N, 112.64°W

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The named rock units Leptorhynchos has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Leptorhynchos and its relatives

Late Cretaceous

Where Leptorhynchos and its relatives were recorded in the Late Cretaceous.

Found in the same rock

86 taxa

The Paleobiology Database records 10 sites for Leptorhynchos, 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 10 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 Leptorhynchos

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Leptorhynchos 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 itCaenagnathidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Longrich et al. 2013