Tokudaia osimensis

The Ryukyu spiny rat is a species of rodent in the family Muridae. Endemic to Amami Ōshima island in the Amami Islands of the Ryukyu archipelago of Japan, its natural habitat is subtropical moist broadleaf forest. The karyotype has an odd diploid number, 2n = 25. Like its relative T. tokunoshimensis, it has lost its Y chromosome and SRY gene.

A picture published with the record for Tokudaia osimensis. What it shows has not been checked.

map data: Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. distribution: Ishii, N. &… · CC BY-SA 3.0 · 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.

Time the record covers

At most 2.6 million years on record.

Every occurrence read is dated to somewhere between 2.58 Mya and 0 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pliocene — about 0 of 2 occurrencesPleistocene — about 2 of 2 occurrencesPleistoceneHolocene — about 0 of 2 occurrences2.7–2.6 Mya — about 0.0 occurrences2.6–2.5 Mya — about 0.1 occurrences2.5–2.4 Mya — about 0.1 occurrences2.4–2.3 Mya — about 0.1 occurrences2.3–2.2 Mya — about 0.1 occurrences2.2–2.1 Mya — about 0.1 occurrences2.1–2.0 Mya — about 0.1 occurrences2.0–1.8 Mya — about 0.1 occurrences1.8–1.7 Mya — about 0.1 occurrences1.7–1.6 Mya — about 0.1 occurrences1.6–1.5 Mya — about 0.1 occurrences1.5–1.4 Mya — about 0.1 occurrences1.4–1.3 Mya — about 0.1 occurrences1.3–1.2 Mya — about 0.1 occurrences1.2–1.1 Mya — about 0.1 occurrences1.1–1.0 Mya — about 0.1 occurrences1.0–924 ka Mya — about 0.1 occurrences924 ka–821 ka Mya — about 0.1 occurrences821 ka–719 ka Mya — about 0.1 occurrences719 ka–616 ka Mya — about 0.1 occurrences616 ka–513 ka Mya — about 0.1 occurrences513 ka–411 ka Mya — about 0.1 occurrences411 ka–308 ka Mya — about 0.1 occurrences308 ka–205 ka Mya — about 0.1 occurrences205 ka–103 ka Mya — about 0.1 occurrences103 ka–0 Mya — about 0.1 occurrences3.08 Mya0 Mya

2 occurrences of Tokudaia osimensis on record, most of them in the Pleistocene. 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

2 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

Itokina — 27.50°N, 129.00°E

Loading coastlines…

The named rock units Tokudaia osimensis 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.

Tokudaia osimensis and its relatives

Pleistocene

Where Tokudaia osimensis and its relatives were recorded in the Pleistocene.

Found in the same rock

6 taxa

The Paleobiology Database records 2 sites for Tokudaia osimensis, 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

2 references

Each of the 2 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 Tokudaia osimensis

Credit
map data: Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. distribution: Ishii, N. &…
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Tokudaia osimensis 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 itFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.