Grampus griseus

Risso's dolphin is the only species of the genus Grampus in the family Delphinidae (dolphins). Some of the most closely related species to these dolphins include: pilot whales, pygmy killer whales, melon-headed whales, and false killer whales. These dolphins grow to be about 10 ft in length and can be identified by heavy scarring that appears white. They are located worldwide in cold to temperate waters, but most typically found along continental shelves due to their eating habits. Risso's dolphins have a diet that contains primarily cephalopods. They are able to search for prey at various depths due to their ability to reach depths of almost 600 m (2,000 ft). Individuals typically travel in pods ranging from 10 to 50 dolphins, with which they form tight social bonds.

Grampus griseus

AliceMartinelli8 · 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
Risso's dolphinPBDB
Sits inside
GrampusPBDB
Diet
piscivore, carnivorePBDB, for Delphinidae
Life habit
aquatic, depth=surfacePBDB, for Cetacea
Motility
actively mobilePBDB, for Cetacea
Environment
marine,freshwaterPBDB, for Odontoceti

Time the record covers

At least 3.5 million years on record.

The record covers at least 3.6 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 17 occurrencesMiocene — about 1 of 17 occurrencesMiocenePliocene — about 1 of 17 occurrencesPliocenePleistocene — about 0 of 17 occurrences24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.0 occurrences22–21 Mya — about 0.0 occurrences21–20 Mya — about 0.0 occurrences20–20 Mya — about 0.0 occurrences20–19 Mya — about 0.0 occurrences19–18 Mya — about 0.0 occurrences18–17 Mya — about 0.0 occurrences17–16 Mya — about 0.0 occurrences16–16 Mya — about 0.0 occurrences16–15 Mya — about 0.0 occurrences15–14 Mya — about 0.0 occurrences14–13 Mya — about 0.0 occurrences13–13 Mya — about 0.0 occurrences13–12 Mya — about 0.0 occurrences12–11 Mya — about 0.0 occurrences11–10 Mya — about 0.0 occurrences10–9.4 Mya — about 0.0 occurrences9.4–8.6 Mya — about 0.0 occurrences8.6–7.8 Mya — about 0.0 occurrences7.8–7.1 Mya — about 0.0 occurrences7.1–6.3 Mya — about 0.0 occurrences6.3–5.5 Mya — about 0.0 occurrences5.5–4.7 Mya — about 0.4 occurrences4.7–3.9 Mya — about 0.5 occurrences3.9–3.1 Mya — about 0.2 occurrences3.1–2.4 Mya — about 0.0 occurrences785 ka–0 Mya — about 15 occurrences3.6 Mya11.7 ka23.5 Mya0 Mya

17 occurrences of Grampus griseus on record. 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

17 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 the same rock

40 taxa

The Paleobiology Database records 17 sites for Grampus griseus, 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

7 references

Each of the 17 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 content2

Picture of Grampus griseus

Credit
AliceMartinelli8
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial
Commercial use
the licence does not allow it

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 itGrampus through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Cuvier 1812)