Rhizoprionodon longurio

The Pacific sharpnose shark often migrates along the Pacific coast of Mexico. They are most commonly caught in the artisanal fishery of Mazatlán. When a large sample of Pacific sharpnose sharks were observed scientists concluded that this type of shark was a "viviparous shark of small size which is born at an average length of 31 cm." Their gestation period is between ten and eleven months.

Rhizoprionodon longurio

D Ross Robertson · Public Domain · 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
Also called
Pacific sharpnose sharkPBDB
Sits inside
RhizoprionodonPBDB
Diet
carnivorePBDB, for Carcharhiniformes
Life habit
nektonicPBDB, for Carcharhiniformes
Motility
actively mobilePBDB, for Carcharhiniformes

Time the record covers

At least 7.1 million years on record.

The record covers at least 7.246 Mya to 129 ka. No occurrence read is dated outside 13.82 Mya to 11.7 ka.

Miocene — about 2 of 6 occurrencesMiocenePliocene — about 1 of 6 occurrencesPliocenePleistocene — about 3 of 6 occurrencesPleistocene14–13 Mya — about 0.1 occurrences13–13 Mya — about 0.1 occurrences13–12 Mya — about 0.1 occurrences12–12 Mya — about 0.1 occurrences12–11 Mya — about 0.1 occurrences11–11 Mya — about 0.1 occurrences11–11 Mya — about 0.1 occurrences11–10 Mya — about 0.1 occurrences10–9.5 Mya — about 0.1 occurrences9.5–9.1 Mya — about 0.1 occurrences9.1–8.6 Mya — about 0.1 occurrences8.6–8.1 Mya — about 0.1 occurrences8.1–7.6 Mya — about 0.1 occurrences7.6–7.2 Mya — about 0.1 occurrences5.7–5.3 Mya — about 0.0 occurrences5.3–4.8 Mya — about 0.3 occurrences4.8–4.3 Mya — about 0.3 occurrences4.3–3.8 Mya — about 0.3 occurrences3.8–3.3 Mya — about 0.1 occurrences1.9–1.4 Mya — about 0.4 occurrences1.4–955 ka Mya — about 0.5 occurrences955 ka–477 ka Mya — about 0.2 occurrences477 ka–0 Mya — about 2 occurrences7.246 Mya129 ka14.3 Mya0 Mya

6 occurrences of Rhizoprionodon longurio on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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

6 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

3 formations

Palos Verdes Sand — 33.66°N, 117.90°WPalos Verdes Sand — 33.99°N, 118.45°WAngostura — 0.88°N, 78.83°WAngostura — 0.60°N, 80.43°WTirabuzón — 27.37°N, 112.29°W

Loading coastlines…

The named rock units Rhizoprionodon longurio 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.

Rhizoprionodon longurio and its relatives

Pleistocene

Where Rhizoprionodon longurio and its relatives were recorded in the Pleistocene.

Found in the same rock

449 taxa

The Paleobiology Database records 5 sites for Rhizoprionodon longurio, 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 6 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 Rhizoprionodon longurio

Credit
D Ross Robertson
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Rhizoprionodon longurio 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 itRhizoprionodon through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Jordan and Gilbert 1883)