Baiomys

Baiomys, the New World pygmy mice, is a genus of rodents in the family Cricetidae. Together with Scotinomys, it forms the tribe Baiomyini. It contains the smallest rodents in North America. It currently contains three extant species:Southern pygmy mouse, Baiomys brunneus Mexican pygmy mouse, Baiomys musculus Northern pygmy mouse, Baiomys taylori

Baiomys

Juan Carlos Pérez Magaña · 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
Also called
pygmy mousePBDB
Sits inside
BaiomyiniPBDB
Diet
herbivorePBDB, for Rodentia
Life habit
ground dwellingPBDB, for Rodentia
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 3.3 million years on record.

The record covers at least 4.7 Mya to 1.4 Mya. No occurrence read is dated outside 9.4 Mya to 210 ka.

Miocene — about 3 of 35 occurrencesMiocenePliocene — about 18 of 35 occurrencesPliocenePleistocene — about 14 of 35 occurrencesPleistoceneHolocene — about 0 of 35 occurrences9.6–9.2 Mya — about 0.1 occurrences9.2–8.9 Mya — about 0.2 occurrences8.9–8.6 Mya — about 0.2 occurrences8.6–8.3 Mya — about 0.2 occurrences8.3–7.9 Mya — about 0.2 occurrences7.9–7.6 Mya — about 0.2 occurrences7.6–7.3 Mya — about 0.2 occurrences7.3–6.9 Mya — about 0.2 occurrences6.9–6.6 Mya — about 0.2 occurrences6.6–6.3 Mya — about 0.2 occurrences6.3–5.9 Mya — about 0.2 occurrences5.9–5.6 Mya — about 0.2 occurrences5.6–5.3 Mya — about 0.2 occurrences5.3–5.0 Mya — about 0.2 occurrences5.0–4.6 Mya — about 0.8 occurrences4.6–4.3 Mya — about 3 occurrences4.3–4.0 Mya — about 3 occurrences4.0–3.6 Mya — about 3 occurrences3.6–3.3 Mya — about 3 occurrences3.3–3.0 Mya — about 3 occurrences3.0–2.6 Mya — about 3 occurrences2.6–2.3 Mya — about 3 occurrences2.3–2.0 Mya — about 3 occurrences2.0–1.6 Mya — about 3 occurrences1.6–1.3 Mya — about 3 occurrences1.3–990 ka Mya — about 1 occurrence990 ka–660 ka Mya — about 1.0 occurrences660 ka–330 ka Mya — about 0.8 occurrences330 ka–0 Mya — about 0.3 occurrences4.7 Mya1.4 Mya9.9 Mya0 Mya

35 occurrences of Baiomys 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

35 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

8 formations

St. David — 32.00°N, 110.20°WSt. David — 31.97°N, 110.30°WGila Conglomerate — 32.70°N, 109.10°WGila Conglomerate — 32.69°N, 109.45°WRexroad — 37.10°N, 100.90°WRexroad — 37.20°N, 100.30°WGlenns Ferry — 42.80°N, 114.90°WSan Timoteo — 33.90°N, 117.00°WBlanco — 33.70°N, 101.10°WPalm Spring — 32.90°N, 117.10°WRancho Viejo Beds — 21.20°N, 100.70°W

Loading coastlines…

The named rock units Baiomys has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.

Baiomys and its relatives

Pliocene

Where Baiomys and its relatives were recorded in the Pliocene.

Found in the same rock

391 taxa

The Paleobiology Database records 34 sites for Baiomys, 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

22 references

Each of the 35 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. 10 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 Baiomys

Credit
Juan Carlos Pérez Magaña
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

CT scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Baiomys taylori · ibm:gpp:CNMA 10974

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 itBaiomyini through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. True 1894