Trichechus hesperamazonicus

Trichechus hesperamazonicus, the western Amazonian manatee, is an extinct species of manatee that lived about 40 thousand years ago in the Madeira River, in the Brazilian state of Rondônia. It is known from this single locality, with possible occurrences in the Brazilian state of Acre.

No picture of Trichechus hesperamazonicus was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Trichechus hesperamazonicus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
TrichechusPBDB
Diet
herbivorePBDB, for Trichechidae
Life habit
aquaticPBDB, for Sirenia
Motility
actively mobilePBDB, for Osteichthyes
Environment
freshwaterPBDB, for Trichechidae

Time the record covers

At most 129 thousand years on record.

The one occurrence read is dated to somewhere between 129 ka and 0 Mya, which is a dating window rather than a span.

Pleistocene — about 1 of 1 occurrencePleistoceneHolocene — about 0 of 1 occurrence147 ka–126 ka Mya — about 0.0 occurrences126 ka–105 ka Mya — about 0.2 occurrences105 ka–84 ka Mya — about 0.2 occurrences84 ka–63 ka Mya — about 0.2 occurrences63 ka–42 ka Mya — about 0.2 occurrences42 ka–21 ka Mya — about 0.2 occurrences21 ka–0 Mya — about 0.2 occurrences629 ka0 Mya

1 occurrence of Trichechus hesperamazonicus 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

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

Rio Madeira — 10.05°S, 65.33°W

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

Trichechus hesperamazonicus and its relatives

Pleistocene

Where Trichechus hesperamazonicus and its relatives were recorded in the Pleistocene.

Found in the same rock

2 taxa

The Paleobiology Database records 1 site for Trichechus hesperamazonicus, 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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content0

No picture of Trichechus hesperamazonicus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Trichechus hesperamazonicus, or no answer at all. This entry cannot say which.

No 3D scan of Trichechus hesperamazonicus 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 itTrichechus through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Perini et al. 2020