Nemacanthus

Nemacanthus is an extinct genus of cartilaginous fish in the family Palaeospinacidae.

Nemacanthus

Ghedoghedo · CC BY-SA 3.0 · 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
PalaeospinacidaePBDB
Diet
carnivorePBDB, for Synechodontiformes
Life habit
nektonicPBDB, for Synechodontiformes
Motility
actively mobilePBDB, for Synechodontiformes

Time the record covers

At least 81 million years on record.

The record covers at least 264.28 Mya to 182.9 Mya. No occurrence read is dated outside 266.9 Mya to 174.7 Mya.

Permian — about 1 of 83 occurrencesPermianEarly Triassic — about 3 of 83 occurrencesMiddle Triassic — about 0 of 83 occurrencesLate Triassic — about 75 of 83 occurrencesLate TriassicEarly Jurassic — about 4 of 83 occurrencesEarly JurassicMiddle Jurassic — about 0 of 83 occurrences269–266 Mya — about 0.5 occurrences266–262 Mya — about 0.5 occurrences253–250 Mya — about 0.6 occurrences250–246 Mya — about 2 occurrences240–237 Mya — about 0.0 occurrences237–234 Mya — about 0.3 occurrences234–230 Mya — about 0.3 occurrences230–227 Mya — about 0.3 occurrences227–224 Mya — about 0.1 occurrences224–221 Mya — about 0.1 occurrences221–218 Mya — about 0.1 occurrences218–214 Mya — about 0.6 occurrences214–211 Mya — about 2 occurrences211–208 Mya — about 0.1 occurrences208–205 Mya — about 15 occurrences205–202 Mya — about 53 occurrences202–198 Mya — about 5 occurrences195–192 Mya — about 0.1 occurrences192–189 Mya — about 0.4 occurrences189–186 Mya — about 0.4 occurrences186–182 Mya — about 0.4 occurrences182–179 Mya — about 0.7 occurrences179–176 Mya — about 0.7 occurrences176–173 Mya — about 0.3 occurrences264.28 Mya182.9 Mya269 Mya173 Mya

83 occurrences of Nemacanthus on record, most of them in the Late Triassic. 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

83 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

13 formations

Westbury — 53.03°N, 0.81°WWestbury — 51.60°N, 2.63°WWestbury — 51.24°N, 2.34°WWestbury — 51.82°N, 2.41°WWestbury — 51.93°N, 2.17°WWestbury — 50.72°N, 3.05°WWestbury — 50.78°N, 2.99°WWestbury — 51.18°N, 3.38°WExter — 48.55°N, 9.07°EExter — 51.57°N, 9.05°EExter — 52.56°N, 9.04°EGrès de Mortinsart — 49.70°N, 5.66°EGrès de Mortinsart — 49.75°N, 5.79°EThaynes — 42.23°N, 111.44°WGrès à Avicula contorta — 48.62°N, 6.33°ESables de Mortinsart — 49.71°N, 5.62°EGrès de Infralias — 48.01°N, 5.53°EGrès de Boisset — 46.91°N, 5.90°EKhuff — 21.01°N, 57.67°EMagnesian Conglomerate — 51.47°N, 2.62°WKössener Schichten — 48.13°N, 16.24°EVikinghøgda — 78.31°N, 16.60°EKossen — 47.53°N, 11.09°E

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The named rock units Nemacanthus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 34 occurrences have no formation on record, which is common for older literature.

Nemacanthus and its relatives

Late Triassic

Where Nemacanthus and its relatives were recorded in the Late Triassic.

Found in the same rock

348 taxa

The Paleobiology Database records 62 sites for Nemacanthus, 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

48 references

Each of the 83 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. 36 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 Nemacanthus

Credit
Ghedoghedo
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Nemacanthus 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 itPalaeospinacidae through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Agassiz 1836