Lissodus

Lissodus is an extinct genus of hybodont. While fossils attributed to this genus are known spanning from the latest Devonian (Famennian) to the very end of the Cretaceous (Maastrichtian), others consider the genus to have a more narrow range, spanning from the Early Triassic to the end of the Early Cretaceous (Albian). Lissodus is often placed in the family Lonchidiidae, though other authors consider it incertae sedis within Hybodontiformes. Lonchidion has often been regarded as synonymous, but many recent authors consider it to be a distinct but closely related genus. Some authors have proposed that Lissodus is not a valid genus, and that its teeth instead represent a morphological type present among many juvenile hybodonts but that is later lost in adults.

Lissodus

Rees, J. · 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
HybodontiformesPBDB
Diet
carnivorePBDB, for Chondrichthyes
Life habit
nektonicPBDB, for Chondrichthyes
Motility
actively mobilePBDB, for Chondrichthyes

Time the record covers

At least 263 million years on record.

The record covers at least 346.7 Mya to 83.6 Mya. No occurrence read is dated outside 358.86 Mya to 66 Mya.

Devonian — about 0 of 154 occurrencesCarboniferous — about 4 of 154 occurrencesCarboniferousPermian — about 9 of 154 occurrencesPermianEarly Triassic — about 15 of 154 occurrencesMiddle Triassic — about 11 of 154 occurrencesLate Triassic — about 74 of 154 occurrencesLate TriassicEarly Jurassic — about 13 of 154 occurrencesEarly JurassicMiddle Jurassic — about 4 of 154 occurrencesLate Jurassic — about 1 of 154 occurrencesEarly Cretaceous — about 12 of 154 occurrencesEarly CretaceousLate Cretaceous — about 11 of 154 occurrencesLate CretaceousPaleocene — about 0 of 154 occurrences365–355 Mya — about 0.4 occurrences355–344 Mya — about 3 occurrences344–334 Mya — about 0.6 occurrences334–324 Mya — about 0.2 occurrences304–294 Mya — about 1.0 occurrences294–283 Mya — about 0.0 occurrences273–263 Mya — about 6 occurrences263–253 Mya — about 1.0 occurrences253–243 Mya — about 18 occurrences243–233 Mya — about 12 occurrences233–223 Mya — about 5 occurrences223–212 Mya — about 5 occurrences212–202 Mya — about 50 occurrences202–192 Mya — about 16 occurrences192–182 Mya — about 5 occurrences182–172 Mya — about 4 occurrences172–162 Mya — about 4 occurrences152–141 Mya — about 0.7 occurrences141–131 Mya — about 1 occurrence131–121 Mya — about 2 occurrences121–111 Mya — about 1 occurrence111–101 Mya — about 7 occurrences101–91 Mya — about 9 occurrences91–80 Mya — about 1.0 occurrences80–70 Mya — about 1 occurrence70–60 Mya — about 0.1 occurrences346.7 Mya83.6 Mya365 Mya60 Mya

154 occurrences of Lissodus 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

154 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

59 formations

Westbury — 53.03°N, 0.81°WWestbury — 51.60°N, 2.63°WWestbury — 51.93°N, 2.17°WWestbury — 51.82°N, 2.41°WWestbury — 50.72°N, 3.05°WWestbury — 51.55°N, 2.40°WWestbury — 51.18°N, 3.38°WExter — 48.55°N, 9.07°EExter — 51.57°N, 9.05°EExter — 52.56°N, 9.04°EZhitkov — 42.93°N, 132.43°ECañete — 39.61°N, 0.77°WCañete — 39.87°N, 1.48°WCañete — 39.38°N, 0.78°WCañete — 39.14°N, 1.07°WGrès de Mortinsart — 49.70°N, 5.66°EGrès de Mortinsart — 49.75°N, 5.79°EIsheevo — 55.78°N, 48.93°EIsheevo — 55.04°N, 46.78°EBahariya — 28.43°N, 28.92°EMarnes de Châlins — 46.91°N, 5.67°EForest Marble — 51.87°N, 1.27°WForest Marble — 50.71°N, 2.78°WChangxing — 29.16°N, 114.61°EChangxing — 25.17°N, 114.93°ELipovskaya — 49.26°N, 43.67°EMoenave — 37.10°N, 113.54°WAïn el Guettar — 32.66°N, 10.21°EKlettgau — 47.50°N, 8.02°EMarshalltown — 40.30°N, 74.30°WGara Sbaa — 30.51°N, 4.84°WVinita — 37.46°N, 77.67°WMarnes de Jamoigne — 49.72°N, 5.22°EColorado City — 32.17°N, 101.25°WIron Springs — 37.37°N, 113.35°WArtoles — 40.82°N, 0.28°WWessex — 50.64°N, 1.41°WKhodzhakul — 40.60°N, 71.83°EPhu Kradung — 16.27°N, 104.43°E

Loading coastlines…

The named rock units Lissodus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 35 further formations hold fewer occurrences each and are not listed. 49 occurrences have no formation on record, which is common for older literature.

Lissodus and its relatives

Late Triassic

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

Found in the same rock

922 taxa

The Paleobiology Database records 143 sites for Lissodus, 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

92 references

Each of the 154 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. 80 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 Lissodus

Credit
Rees, J.
Licence
CC BY-SA 4.0
Commercial use
the licence allows it

No 3D scan of Lissodus 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 itHybodontiformes through timeFormations of the Late TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Brough 1935