Stegomastodon

Stegomastodon is an extinct genus of gomphotheres. It ranged throughout North America from the Pliocene, to the Early Pleistocene. The former South American species have been synonymized with Notiomastodon platensis.

Stegomastodon

WolfmanSF · 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
Sits inside
GomphotheriidaePBDB
Diet
grazerPBDB
Life habit
ground dwellingPBDB
Motility
actively mobilePBDB, for Osteichthyes
Environment
terrestrialPBDB, for Eutheria

Time the record covers

At least 4.5 million years on record.

The record covers at least 4.7 Mya to 129 ka. No occurrence read is dated outside 9.4 Mya to 11.7 ka.

Miocene — about 3 of 58 occurrencesMiocenePliocene — about 29 of 58 occurrencesPliocenePleistocene — about 26 of 58 occurrencesPleistoceneHolocene — about 0 of 58 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 1 occurrence4.6–4.3 Mya — about 4 occurrences4.3–4.0 Mya — about 4 occurrences4.0–3.6 Mya — about 4 occurrences3.6–3.3 Mya — about 5 occurrences3.3–3.0 Mya — about 5 occurrences3.0–2.6 Mya — about 5 occurrences2.6–2.3 Mya — about 4 occurrences2.3–2.0 Mya — about 4 occurrences2.0–1.6 Mya — about 4 occurrences1.6–1.3 Mya — about 4 occurrences1.3–990 ka Mya — about 2 occurrences990 ka–660 ka Mya — about 2 occurrences660 ka–330 ka Mya — about 2 occurrences330 ka–0 Mya — about 5 occurrences4.7 Mya129 ka9.9 Mya0 Mya

58 occurrences of Stegomastodon on record, most of them in the Pliocene. 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

58 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

22 formations

Blanco — 33.70°N, 101.10°WBlanco — 33.81°N, 101.21°WBlanco — 33.78°N, 101.29°WSt. David — 32.00°N, 110.20°WGila Conglomerate — 32.70°N, 109.10°WGila Conglomerate — 32.70°N, 109.00°WRexroad — 37.20°N, 100.30°WRexroad — 37.13°N, 100.48°WPalomas — 34.00°N, 107.00°WPalomas — 33.10°N, 107.30°WBallard — 37.20°N, 100.30°WSuelo — 28.60°S, 59.03°WSnake Creek — 42.40°N, 103.80°WRancho Viejo Beds — 21.20°N, 100.70°WVerde — 34.50°N, 112.50°WSan Diego — 32.90°N, 117.10°WGlenns Ferry — 43.60°N, 116.80°WCrooked Creek — 37.20°N, 100.30°WLong Pine — 42.38°N, 98.23°WSierra Ladrones — 34.00°N, 107.00°WBon Homme Gravel — 43.00°N, 97.40°WPalm Spring — 32.90°N, 117.10°WSeymour — 33.80°N, 99.70°WCamp Rice — 32.00°N, 106.70°WSappa — 40.20°N, 99.40°WChapala — 20.33°N, 103.13°WDolores — 34.38°S, 57.88°W

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The named rock units Stegomastodon 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.

Stegomastodon and its relatives

Pliocene

Where Stegomastodon and its relatives were recorded in the Pliocene.

Found in the same rock

450 taxa

The Paleobiology Database records 56 sites for Stegomastodon, 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

43 references

Each of the 58 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. 31 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 Stegomastodon

Credit
WolfmanSF
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-ShareAlike
Commercial use
cannot be read from the licence given — check the record

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 itGomphotheriidae through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Pohlig 1912