Hydrodamalinae

Hydrodamalinae is a recently extinct subfamily of the sirenian family Dugongidae. The Steller's sea cow was hunted to extinction by 1768, while the genus Dusisiren is known from fossils dating from the middle Miocene to early Pliocene.

Hydrodamalinae

Emőke Dénes · 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
Sits inside
DugongidaePBDB
Diet
herbivorePBDB, for Dugongidae
Life habit
aquaticPBDB, for Sirenia
Motility
actively mobilePBDB, for Osteichthyes
Environment
marinePBDB, for Sirenia

Time the record covers

At least 11 million years on record.

The record covers at least 11.63 Mya to 11.7 ka. No occurrence read is dated outside 15.98 Mya to 0 Mya.

Miocene — about 29 of 78 occurrencesMiocenePliocene — about 26 of 78 occurrencesPliocenePleistocene — about 15 of 78 occurrencesPleistocene16–16 Mya — about 0.0 occurrences16–15 Mya — about 0.5 occurrences15–15 Mya — about 0.5 occurrences15–14 Mya — about 0.5 occurrences14–14 Mya — about 0.5 occurrences14–13 Mya — about 0.5 occurrences13–13 Mya — about 0.5 occurrences13–12 Mya — about 0.5 occurrences12–12 Mya — about 0.9 occurrences12–11 Mya — about 3 occurrences11–10 Mya — about 3 occurrences10–9.9 Mya — about 3 occurrences9.9–9.3 Mya — about 3 occurrences9.3–8.8 Mya — about 3 occurrences8.8–8.2 Mya — about 3 occurrences8.2–7.7 Mya — about 3 occurrences7.7–7.1 Mya — about 2 occurrences7.1–6.6 Mya — about 1 occurrence6.6–6.0 Mya — about 1 occurrence6.0–5.5 Mya — about 1 occurrence5.5–4.9 Mya — about 3 occurrences4.9–4.4 Mya — about 4 occurrences4.4–3.8 Mya — about 3 occurrences3.8–3.3 Mya — about 6 occurrences3.3–2.7 Mya — about 8 occurrences2.7–2.2 Mya — about 4 occurrences2.2–1.6 Mya — about 2 occurrences1.6–1.1 Mya — about 2 occurrences1.1–549 ka Mya — about 3 occurrences549 ka–0 Mya — about 15 occurrences11.63 Mya11.7 ka16.5 Mya0 Mya

78 occurrences of Hydrodamalinae on record, most of them in the Miocene. 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

78 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

25 formations

Monterey — 33.56°N, 117.71°WMonterey — 33.56°N, 117.75°WMonterey — 37.90°N, 122.72°WMonterey — 34.61°N, 120.44°WSanta Margarita — 37.06°N, 122.04°WSanta Margarita — 37.01°N, 122.01°WSanta Margarita — 37.07°N, 122.05°WSanta Margarita — 35.13°N, 118.82°WSan Mateo — 33.20°N, 117.37°WSan Mateo — 33.26°N, 117.30°WYsidro — 26.23°N, 112.50°WYsidro — 26.29°N, 112.45°WPismo — 35.17°N, 120.73°WPismo — 35.39°N, 120.85°WCapistrano — 33.56°N, 117.71°WCapistrano — 33.55°N, 117.71°WSarumaru — 36.67°N, 138.07°EShimonopporo — 43.15°N, 141.51°EShimonopporo — 42.81°N, 141.54°EDrakes Bay — 37.99°N, 123.00°WPurisima — 36.95°N, 122.04°WSan Diego — 32.48°N, 117.00°WLomita Marl — 33.78°N, 118.34°WSouth Bight II — 51.54°N, 178.98°ESan Diego — 32.90°N, 117.10°WShiotsubo — 37.60°N, 139.74°EHorokaoshirarika — 43.84°N, 141.88°EMandano — 35.34°N, 140.15°EMashike — 43.84°N, 141.88°EHongo — 38.33°N, 140.21°EIimuro — 35.62°N, 139.57°EShiroiwa — 37.34°N, 138.83°ETowsley — 34.40°N, 118.45°WTamari — 34.77°N, 138.02°ENakawatari — 38.77°N, 140.15°E

Loading coastlines…

The named rock units Hydrodamalinae has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 27 occurrences have no formation on record, which is common for older literature.

Hydrodamalinae and its relatives

Miocene

Where Hydrodamalinae and its relatives were recorded in the Miocene.

Found in the same rock

387 taxa

The Paleobiology Database records 73 sites for Hydrodamalinae, 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

29 references

Each of the 78 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. 17 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 Hydrodamalinae

Credit
Emőke Dénes
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Hydrodamalinae 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 itDugongidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Palmer 1895)