Lophonetta specularioides

The crested duck or South American crested duck is a species of duck native to South America, belonging to the monotypic genus Lophonetta. It is sometimes included in Anas, but it belongs to a South American clade that diverged early in dabbling duck evolution. There are two subspecies: L. specularioides alticola and L. specularioides specularioides. The Patagonian crested duck is also called the southern crested duck and its range lies in the Falklands, Chile, and Argentina.

Lophonetta specularioides

Charles J. Sharp · 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
crested duckPBDB
Sits inside
LophonettaPBDB
Diet
herbivorePBDB, for Anseriformes
Life habit
volantPBDB, for Anseriformes
Motility
actively mobilePBDB, for Theropoda
Environment
terrestrialPBDB, for Theropoda

Time the record covers

At most 129 thousand years on record.

Every occurrence read is dated to somewhere between 129 ka and 0 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Pleistocene — about 1 of 2 occurrencesPleistoceneHolocene — about 1 of 2 occurrences147 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 1 occurrence629 ka0 Mya

2 occurrences of Lophonetta specularioides on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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

Laguna de Tagua Tagua — 34.50°S, 71.17°W

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The named rock units Lophonetta specularioides 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.

Lophonetta specularioides and its relatives

Pleistocene

Where Lophonetta specularioides and its relatives were recorded in the Pleistocene.

Found in the same rock

52 taxa

The Paleobiology Database records 2 sites for Lophonetta specularioides, 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

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. Each entry links to doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.

Media and terms

Media content1

Picture of Lophonetta specularioides

Credit
Charles J. Sharp
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Lophonetta specularioides was found in MorphoSource and Sketchfab.

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 itLophonetta through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (King 1828)