Myledaphus

Myledaphus is an extinct genus of guitarfish. It contains four valid species found in North America, South America, and Central Asia. It is confirmed to have lived during the Late Cretaceous, with possible occurrences in the Paleocene and early Eocene. While the genus is mostly known from teeth, two partial skeletons of M. bipartitus have been found in the Dinosaur Park Formation of Alberta.

Myledaphus

Bloopityboop · CC BY-SA 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
RhinobatidaePBDB
Diet
carnivorePBDB, for Chondrichthyes
Life habit
nektonicPBDB, for Chondrichthyes
Motility
actively mobilePBDB, for Chondrichthyes

Time the record covers

At least 23 million years on record.

The record covers at least 89.8 Mya to 66 Mya. No occurrence read is dated outside 93.9 Mya to 61.66 Mya.

Late Cretaceous — about 241 of 242 occurrencesLate CretaceousPaleocene — about 1 of 242 occurrencesPaleocene95–93 Mya — about 0.2 occurrences93–92 Mya — about 0.5 occurrences92–91 Mya — about 0.5 occurrences91–90 Mya — about 0.5 occurrences90–89 Mya — about 0.1 occurrences87–86 Mya — about 0.1 occurrences86–84 Mya — about 1 occurrence84–83 Mya — about 3 occurrences83–82 Mya — about 11 occurrences82–81 Mya — about 11 occurrences81–80 Mya — about 11 occurrences80–79 Mya — about 11 occurrences79–78 Mya — about 11 occurrences78–77 Mya — about 11 occurrences77–76 Mya — about 11 occurrences76–74 Mya — about 11 occurrences74–73 Mya — about 11 occurrences73–72 Mya — about 11 occurrences72–71 Mya — about 22 occurrences71–70 Mya — about 22 occurrences70–69 Mya — about 22 occurrences69–68 Mya — about 22 occurrences68–67 Mya — about 22 occurrences67–65 Mya — about 12 occurrences65–64 Mya — about 0.3 occurrences64–63 Mya — about 0.3 occurrences63–62 Mya — about 0.3 occurrences62–61 Mya — about 0.1 occurrences89.8 Mya66 Mya94.5 Mya61 Mya

242 occurrences of Myledaphus 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

242 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

34 formations

Hell Creek — 47.80°N, 106.10°WHell Creek — 46.03°N, 103.77°WHell Creek — 46.21°N, 103.77°WHell Creek — 46.38°N, 103.96°WHell Creek — 45.95°N, 103.96°WHell Creek — 46.41°N, 103.94°WHell Creek — 46.10°N, 103.30°WHell Creek — 46.33°N, 103.90°WHell Creek — 45.94°N, 103.95°WHell Creek — 47.55°N, 107.13°WHell Creek — 47.62°N, 107.32°WHell Creek — 47.57°N, 107.10°WHell Creek — 47.52°N, 106.40°WHell Creek — 47.55°N, 107.25°WHell Creek — 47.53°N, 106.92°WHell Creek — 47.07°N, 106.92°WHell Creek — 47.60°N, 106.27°WHell Creek — 47.60°N, 107.23°WHell Creek — 46.90°N, 101.50°WHell Creek — 47.60°N, 107.00°WHell Creek — 46.46°N, 104.00°WHell Creek — 46.33°N, 104.01°WHell Creek — 46.41°N, 103.50°WHell Creek — 45.66°N, 105.08°WHell Creek — 45.89°N, 104.55°WHell Creek — 45.50°N, 103.10°WHell Creek — 45.64°N, 103.49°WHell Creek — 47.60°N, 106.92°WHell Creek — 47.27°N, 107.13°WHell Creek — 45.53°N, 101.63°WHell Creek — 45.00°N, 103.19°WHell Creek — 45.05°N, 101.97°WDinosaur Park — 50.81°N, 111.32°WDinosaur Park — 49.12°N, 110.47°WDinosaur Park — 50.75°N, 111.48°WDinosaur Park — 50.74°N, 111.49°WDinosaur Park — 50.79°N, 111.62°WDinosaur Park — 50.75°N, 111.40°WDinosaur Park — 50.68°N, 108.09°WLance — 43.30°N, 104.37°WLance — 43.12°N, 104.64°WLance — 41.57°N, 108.67°WLance — 41.57°N, 108.65°WLance — 43.18°N, 104.53°WLance — 43.15°N, 104.57°WLance — 43.80°N, 104.62°WLance — 43.00°N, 104.50°WLance — 43.25°N, 104.65°WLance — 43.25°N, 104.52°WLance — 43.27°N, 104.62°WJudith River — 46.47°N, 109.30°WJudith River — 46.46°N, 109.41°WJudith River — 46.10°N, 109.10°WJudith River — 48.03°N, 109.01°WJudith River — 47.79°N, 108.94°WJudith River — 48.01°N, 108.91°WJudith River — 48.58°N, 109.22°WJudith River — 48.05°N, 106.32°WJudith River — 48.53°N, 109.67°WJudith River — 47.87°N, 109.15°WJudith River — 48.25°N, 109.30°WJudith River — 46.76°N, 108.00°WJudith River — 47.74°N, 108.96°WJudith River — 43.64°N, 109.35°WJudith River — 46.42°N, 109.27°WJudith River — 46.40°N, 109.66°WJudith River — 46.44°N, 109.83°WOldman — 50.75°N, 111.51°WOldman — 49.10°N, 110.94°WOldman — 49.08°N, 110.84°WOldman — 49.08°N, 110.68°WOldman — 49.16°N, 110.72°WOldman — 50.83°N, 111.32°WOldman — 49.96°N, 110.26°WMesaverde — 42.85°N, 107.28°WMesaverde — 44.08°N, 107.74°WMesaverde — 44.10°N, 107.75°WMesaverde — 44.17°N, 107.81°WFerris — 41.80°N, 107.00°WFerris — 41.94°N, 106.89°WFox Hills — 46.47°N, 99.58°WFox Hills — 46.42°N, 100.74°WFox Hills — 44.52°N, 102.39°WFox Hills — 45.13°N, 101.80°WHorseshoe Canyon — 51.55°N, 112.87°WHorseshoe Canyon — 52.00°N, 112.88°WHorseshoe Canyon — 51.55°N, 112.88°WFrenchman — 49.50°N, 109.10°WFrenchman — 49.04°N, 106.60°WFrenchman — 49.40°N, 107.40°WFrenchman — 49.30°N, 108.40°WFruitland — 36.49°N, 108.49°WFruitland — 36.27°N, 108.26°WForemost — 50.07°N, 111.14°WForemost — 49.13°N, 110.87°WJudith River — 49.10°N, 109.50°WJudith River — 50.50°N, 107.83°WKirtland — 36.28°N, 108.18°WKirtland — 36.51°N, 108.32°WKaiparowits — 37.45°N, 111.53°WKaiparowits — 37.40°N, 111.20°WLaramie — 40.39°N, 104.49°WScollard — 52.33°N, 113.12°WSt. Mary River — 49.91°N, 112.99°WBeshtyubin — 40.10°N, 67.00°EMedicine Bow — 41.80°N, 107.00°WMilk River — 49.08°N, 111.44°WOlmos — 27.81°N, 101.16°WBissekty — 42.12°N, 62.66°EMasuk — 38.06°N, 110.98°W

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The named rock units Myledaphus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 further formations hold fewer occurrences each and are not listed. 2 occurrences have no formation on record, which is common for older literature.

Myledaphus and its relatives

Late Cretaceous

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

Found in the same rock

816 taxa

The Paleobiology Database records 240 sites for Myledaphus, 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

78 references

Each of the 242 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. 66 further references are not listed. 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 content2

Picture of Myledaphus

Credit
Bloopityboop
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

Structured light scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Myledaphus sp. · dmnh:epv:150607

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 itRhinobatidae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Cope 1876