Mergus australis

The Auckland Island merganser, also known as the New Zealand merganser, is an extinct species of typical merganser.

Mergus australis

Te Papa · 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
Also called
Auckland Islands merganserPBDB
Sits inside
MergusPBDB
Diet
herbivorePBDB, for Anatinae
Life habit
volantPBDB, for Anatinae
Motility
actively mobilePBDB, for Theropoda
Environment
freshwaterPBDB, for Anatinae

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 2 of 6 occurrencesPleistoceneHolocene — about 4 of 6 occurrences147 ka–126 ka Mya — about 0.1 occurrences126 ka–105 ka Mya — about 0.4 occurrences105 ka–84 ka Mya — about 0.4 occurrences84 ka–63 ka Mya — about 0.4 occurrences63 ka–42 ka Mya — about 0.4 occurrences42 ka–21 ka Mya — about 0.4 occurrences21 ka–0 Mya — about 4 occurrences629 ka0 Mya

6 occurrences of Mergus australis on record, most of them in the Holocene. 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

6 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

Hillgrove — 45.13°S, 170.97°E

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The named rock units Mergus australis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Mergus australis and its relatives

Holocene

Where Mergus australis and its relatives were recorded in the Holocene.

Found in the same rock

123 taxa

The Paleobiology Database records 6 sites for Mergus australis, 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

3 references

Each of the 6 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. 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 Mergus australis

Credit
Te Papa
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Mergus australis 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 itMergus through timeFormations of the HoloceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Hombron and Jacquinot 1841