Hemitrygon akajei

The red stingray is a species of stingray in the family Dasyatidae, found in the northwestern Pacific Ocean off Japan, Korea, and China, and possibly elsewhere. It primarily inhabits shallow, sandy habitats close to shore, and has been known to enter brackish water. The red stingray has a diamond-shaped pectoral fin disc and gains its common name from its bright orange-red underside; there may also be patches of orange at various spots on its upper surface. Most individuals are no more than 1 m (3.3 ft) long.

Hemitrygon akajei

Ishikawa Ken from Kamakura, Japan · CC BY-SA 2.0 · 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
Also called
red stingrayPBDB
Sits inside
HemitrygonPBDB
Diet
carnivorePBDB, for Myliobatiformes
Life habit
nektobenthicPBDB, for Myliobatiformes
Motility
actively mobilePBDB, for Myliobatiformes

Time the record covers

At most 1.8 million years on record.

The one occurrence read is dated to somewhere between 5.333 Mya and 3.6 Mya, which is a dating window rather than a span.

Miocene — about 0 of 1 occurrencePliocene — about 1 of 1 occurrencePliocene5.4–5.3 Mya — about 0.0 occurrences5.3–5.2 Mya — about 0.1 occurrences5.2–5.1 Mya — about 0.1 occurrences5.1–5.0 Mya — about 0.1 occurrences5.0–4.9 Mya — about 0.1 occurrences4.9–4.8 Mya — about 0.1 occurrences4.8–4.7 Mya — about 0.1 occurrences4.7–4.6 Mya — about 0.1 occurrences4.6–4.6 Mya — about 0.1 occurrences4.6–4.5 Mya — about 0.1 occurrences4.5–4.4 Mya — about 0.1 occurrences4.4–4.3 Mya — about 0.1 occurrences4.3–4.2 Mya — about 0.1 occurrences4.2–4.1 Mya — about 0.1 occurrences4.1–4.0 Mya — about 0.1 occurrences4.0–3.9 Mya — about 0.1 occurrences3.9–3.8 Mya — about 0.1 occurrences3.8–3.7 Mya — about 0.1 occurrences3.7–3.6 Mya — about 0.1 occurrences3.6–3.6 Mya — about 0.0 occurrences5.83 Mya3.1 Mya

1 occurrence of Hemitrygon akajei on record, most of them in the Pliocene. 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

1 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

1 formation

Tatsunokuchi — 38.27°N, 140.86°E

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

Hemitrygon akajei and its relatives

Pliocene

Where Hemitrygon akajei and its relatives were recorded in the Pliocene.

Found in the same rock

11 taxa

The Paleobiology Database records 1 site for Hemitrygon akajei, and this reads all of them. The number is how many of those sites it was catalogued from too.

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

1 reference

Each of the 1 occurrence 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 the Paleobiology Database's own record for the work.

Media and terms

Media content3

Picture of Hemitrygon akajei

Credit
Ishikawa Ken from Kamakura, Japan
Licence
CC BY-SA 2.0
Commercial use
the licence allows it

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Hemitrygon akajei · tcwc:ichthyology:7377.13

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

Smithsonian Open Access was 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 itHemitrygon through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Muller and Henle 1841)