Hemiauchenia

Hemiauchenia is an extinct genus of lamine camelids that evolved in North America in the Miocene epoch about 10 million years ago. This genus diversified and entered South America in the Late Pliocene about three to two million years ago, as part of the Great American Biotic Interchange. The genus became extinct at the end of the Pleistocene. The monophyly of the genus has been considered questionable, with phylogenetic analyses finding the genus to paraphyletic or polyphyletic, with some species suggested to be more closely related to living lamines than to other Hemiauchenia species.

Hemiauchenia

Geekgecko · CC BY 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
LaminiPBDB
Diet
browser, grazerPBDB
Life habit
ground dwellingPBDB, for Camelidae
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Artiodactyla

Time the record covers

At least 9.2 million years on record.

The record covers at least 9.4 Mya to 129 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 272 occurrencesMiocene — about 47 of 272 occurrencesMiocenePliocene — about 59 of 272 occurrencesPliocenePleistocene — about 166 of 272 occurrencesPleistocene24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.1 occurrences22–21 Mya — about 0.1 occurrences21–20 Mya — about 0.1 occurrences20–20 Mya — about 0.1 occurrences20–19 Mya — about 0.1 occurrences19–18 Mya — about 0.1 occurrences18–17 Mya — about 0.1 occurrences17–16 Mya — about 0.1 occurrences16–16 Mya — about 0.1 occurrences16–15 Mya — about 0.1 occurrences15–14 Mya — about 0.1 occurrences14–13 Mya — about 0.1 occurrences13–13 Mya — about 0.1 occurrences13–12 Mya — about 1 occurrence12–11 Mya — about 1 occurrence11–10 Mya — about 1 occurrence10–9.4 Mya — about 1 occurrence9.4–8.6 Mya — about 8 occurrences8.6–7.8 Mya — about 8 occurrences7.8–7.1 Mya — about 8 occurrences7.1–6.3 Mya — about 8 occurrences6.3–5.5 Mya — about 8 occurrences5.5–4.7 Mya — about 8 occurrences4.7–3.9 Mya — about 18 occurrences3.9–3.1 Mya — about 20 occurrences3.1–2.4 Mya — about 22 occurrences2.4–1.6 Mya — about 28 occurrences1.6–785 ka Mya — about 42 occurrences785 ka–0 Mya — about 88 occurrences9.4 Mya129 ka23.5 Mya0 Mya

272 occurrences of Hemiauchenia 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

272 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

64 formations

Palm Spring — 32.90°N, 117.10°WBermont — 28.80°N, 82.20°WBermont — 27.70°N, 82.50°WBermont — 26.90°N, 82.00°WBermont — 27.00°N, 82.20°WGila Conglomerate — 32.84°N, 110.00°WGila Conglomerate — 32.58°N, 109.48°WGila Conglomerate — 32.90°N, 109.10°WGila Conglomerate — 32.70°N, 109.10°WGila Conglomerate — 32.70°N, 109.00°WCamp Rice — 32.00°N, 106.70°WCamp Rice — 31.50°N, 105.20°WCamp Rice — 32.65°N, 107.23°WAlachua — 29.55°N, 82.52°WAlachua — 29.65°N, 82.60°WAlachua — 29.40°N, 82.60°WAlachua — 29.10°N, 82.30°WSt. David — 32.00°N, 110.20°WAsh Hollow — 43.20°N, 100.70°WAsh Hollow — 41.30°N, 101.89°WAsh Hollow — 42.80°N, 100.80°WPeace River — 27.50°N, 82.50°WPeace River — 27.90°N, 81.80°WPeace River — 27.68°N, 81.95°WPeace Valley Beds — 34.71°N, 118.81°WTamiami — 27.37°N, 82.45°WTamiami — 27.30°N, 80.80°WTamiami — 26.50°N, 81.80°WBlanco — 33.70°N, 101.10°WBlanco — 33.77°N, 101.28°WBlanco — 33.81°N, 101.21°WLove — 31.50°N, 105.20°WRancho Viejo Beds — 21.03°N, 100.75°WRancho Viejo Beds — 21.08°N, 100.67°W"unnamed sandstone" — 33.90°N, 117.00°WCaloosahatchee — 27.04°N, 81.82°WDolores — 34.42°S, 56.26°WDolores — 34.38°S, 57.88°WSalto Ander Egg — 32.07°S, 60.55°WSalto Ander Egg — 31.03°S, 60.50°WSopas — 31.25°S, 57.00°WSopas — 30.43°S, 56.45°WSopas — 32.05°S, 56.12°WBridwell — 33.70°N, 101.10°WBridwell — 33.70°N, 101.90°WPanaca — 37.80°N, 114.30°WRexroad — 37.20°N, 100.30°WPalomas — 34.00°N, 107.00°WPalomas — 33.10°N, 107.30°WRingold — 47.00°N, 118.50°WRingold — 46.30°N, 119.10°WSeymour — 33.80°N, 99.70°WSeymour — 33.75°N, 99.50°W

Loading coastlines…

The named rock units Hemiauchenia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 40 further formations hold fewer occurrences each and are not listed. 133 occurrences have no formation on record, which is common for older literature.

Hemiauchenia and its relatives

Pleistocene

Where Hemiauchenia and its relatives were recorded in the Pleistocene.

Found in the same rock

1,860 taxa

The Paleobiology Database records 259 sites for Hemiauchenia, and this reads 240 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

139 references

Each of the 272 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. 127 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 content1

Picture of Hemiauchenia

Credit
Geekgecko
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Hemiauchenia 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 itLamini through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Gervais and Ameghino 1880