Janassa

Janassa is an extinct genus of petalodont cartilaginous fish that lived in marine environments in what is now central United States of America and Europe during the Carboniferous and upper Permian.

Janassa

Ta-tea-two-te-to · CC BY 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
JanassinaePBDB
Diet
carnivorePBDB, for Petalodontiformes
Life habit
nektonicPBDB, for Petalodontiformes
Motility
actively mobilePBDB, for Petalodontiformes

Time the record covers

At least 70 million years on record.

The record covers at least 330.3 Mya to 259.857 Mya. No occurrence read is dated outside 358.86 Mya to 254.14 Mya.

Devonian — about 0 of 47 occurrencesCarboniferous — about 16 of 47 occurrencesCarboniferousPermian — about 31 of 47 occurrencesPermian361–357 Mya — about 0.1 occurrences357–354 Mya — about 0.3 occurrences354–350 Mya — about 0.3 occurrences350–346 Mya — about 0.3 occurrences346–343 Mya — about 0.5 occurrences343–339 Mya — about 0.5 occurrences339–336 Mya — about 0.5 occurrences336–332 Mya — about 0.5 occurrences332–328 Mya — about 0.4 occurrences328–325 Mya — about 1.0 occurrences325–321 Mya — about 0.6 occurrences321–317 Mya — about 0.3 occurrences317–314 Mya — about 1 occurrence314–310 Mya — about 3 occurrences310–307 Mya — about 3 occurrences307–303 Mya — about 2 occurrences303–299 Mya — about 0.3 occurrences299–296 Mya — about 0.0 occurrences296–292 Mya — about 0.9 occurrences292–288 Mya — about 1 occurrence288–285 Mya — about 0.5 occurrences285–281 Mya — about 0.5 occurrences281–277 Mya — about 0.5 occurrences277–274 Mya — about 0.7 occurrences274–270 Mya — about 2 occurrences270–267 Mya — about 2 occurrences267–263 Mya — about 0.3 occurrences263–259 Mya — about 2 occurrences259–256 Mya — about 14 occurrences256–252 Mya — about 6 occurrences330.3 Mya259.857 Mya361 Mya252 Mya

47 occurrences of Janassa on record, most of them in the Permian. 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

47 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

12 formations

Kupferschiefer — 51.53°N, 11.54°EKupferschiefer — 51.50°N, 11.57°EKupferschiefer — 50.98°N, 10.01°EKupferschiefer — 50.83°N, 10.35°EKupferschiefer — 51.55°N, 11.41°EPhosphoria — 43.01°N, 109.00°WPhosphoria — 43.19°N, 109.16°WPhosphoria — 42.67°N, 108.68°WZechstein — 51.23°N, 8.89°EZechstein — 51.49°N, 6.55°EZechstein — 51.53°N, 11.49°ELueders — 33.75°N, 99.15°WLueders — 33.75°N, 99.12°WIchinotani — 36.22°N, 137.51°EWreford Limestone — 37.10°N, 96.81°WWreford Limestone — 39.05°N, 96.75°WRaisby — 55.03°N, 1.44°WRaisby — 54.63°N, 1.61°WHeath — 46.95°N, 108.96°WMinnelusa — 44.22°N, 103.41°WKalinovskaya — 51.93°N, 55.26°EPark City — 43.19°N, 109.16°WSte. Genevieve — 37.19°N, 86.10°W

Loading coastlines…

The named rock units Janassa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Janassa and its relatives

Permian

Where Janassa and its relatives were recorded in the Permian.

Found in the same rock

215 taxa

The Paleobiology Database records 40 sites for Janassa, 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

23 references

Each of the 47 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. 11 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 Janassa

Credit
Ta-tea-two-te-to
Licence
CC BY 4.0
Commercial use
the licence allows it

No 3D scan of Janassa 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 itJanassinae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.