Pachythrissops

Pachythrissops is an extinct genus of ray-finned fish. It contains two species, P. laevis from the Purbeckian of England and P. propterus from the Tithonian of Germany. A third species, P. vectensis, has been reassigned to the elopiform genus Arratiaelops. Pachythrissops is often regarded as one of the most primitive members of the order Ichthyodectiformes; however, a phylogenetic analysis by Cavin et al. (2013) placed it and the related genus Ascalabothrissops outside the group.

Pachythrissops

User:Haplochromis · 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
IchthyodectiformesPBDB
Diet
carnivorePBDB, for Ichthyodectiformes
Life habit
nektonicPBDB, for Ichthyodectiformes
Motility
actively mobilePBDB, for Ichthyodectiformes

Time the record covers

At least 19 million years on record.

The record covers at least 145.06 Mya to 125.77 Mya. No occurrence read is dated outside 152.21 Mya to 119.57 Mya.

Late Jurassic — about 2 of 6 occurrencesLate JurassicEarly Cretaceous — about 4 of 6 occurrencesEarly Cretaceous153–152 Mya — about 0.1 occurrences152–151 Mya — about 0.2 occurrences151–149 Mya — about 0.2 occurrences149–148 Mya — about 0.4 occurrences148–147 Mya — about 0.4 occurrences147–146 Mya — about 0.4 occurrences146–145 Mya — about 0.4 occurrences144–143 Mya — about 0.0 occurrences143–142 Mya — about 0.1 occurrences142–140 Mya — about 0.1 occurrences140–139 Mya — about 0.1 occurrences139–138 Mya — about 0.1 occurrences138–137 Mya — about 0.1 occurrences137–136 Mya — about 0.3 occurrences136–135 Mya — about 0.3 occurrences135–134 Mya — about 0.3 occurrences134–132 Mya — about 0.3 occurrences132–131 Mya — about 0.1 occurrences131–130 Mya — about 0.1 occurrences130–129 Mya — about 0.1 occurrences129–128 Mya — about 0.1 occurrences128–127 Mya — about 0.1 occurrences127–126 Mya — about 0.1 occurrences126–125 Mya — about 0.5 occurrences125–123 Mya — about 0.5 occurrences123–122 Mya — about 0.5 occurrences122–121 Mya — about 0.4 occurrences121–120 Mya — about 0.2 occurrences120–119 Mya — about 0.1 occurrences145.06 Mya125.77 Mya152.9 Mya118.9 Mya

6 occurrences of Pachythrissops on record, most of them in the Early Cretaceous. 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

4 formations

Solnhofen — 48.90°N, 11.18°ESolnhofen — 48.94°N, 8.41°EWadhurst Clay — 50.86°N, 0.44°EArcillas de Morella — 40.62°N, 0.10°WSainte-Barbe Clays — 50.48°N, 3.65°E

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The named rock units Pachythrissops has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Pachythrissops and its relatives

Early Cretaceous

Where Pachythrissops and its relatives were recorded in the Early Cretaceous.

Found in the same rock

164 taxa

The Paleobiology Database records 6 sites for Pachythrissops, 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

6 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 content2

Picture of Pachythrissops

Credit
User:Haplochromis
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

Synchrotron Imaging scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Pachythrissops laevis · nhmuk:pal:PV P 41859

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 itIchthyodectiformes through timeFormations of the Early CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Woodward 1919