Phaedrysmocheilus

Phaedrysmocheilus is a genus of Early Triassic Tainoceratids from Siberia. The shell is a rapidly expanding, moderately involute nautilicone; smooth in the adult stage but laterally ribbed in the juvenile stage. Volutions are convex laterally, arched ventrally, embraced dorsally. Whorl sections change during development from being slightly depressed, early, to slightly compressed later, changing from being relatively wide to relatively high. The umbilicus is deep and funnel shaped. Sutures are slightly sinuous.

No picture of Phaedrysmocheilus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Phaedrysmocheilus, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
PleuronautilidaePBDB
Diet
carnivorePBDB, for Nautilida
Life habit
nektobenthicPBDB, for Nautilida
Motility
actively mobilePBDB, for Nautilida
Vision
well-developedPBDB, for Cephalopoda
Environment
marinePBDB, for Cephalopoda

Time the record covers

At least 5.5 million years on record.

The record covers at least 254.14 Mya to 248.6 Mya. No occurrence read is dated outside 259.857 Mya to 247 Mya.

Permian — about 1 of 67 occurrencesPermianEarly Triassic — about 66 of 67 occurrencesEarly TriassicMiddle Triassic — about 0 of 67 occurrences260–259 Mya — about 0.1 occurrences259–259 Mya — about 0.1 occurrences259–259 Mya — about 0.1 occurrences259–258 Mya — about 0.1 occurrences258–258 Mya — about 0.1 occurrences258–257 Mya — about 0.1 occurrences257–257 Mya — about 0.1 occurrences257–256 Mya — about 0.1 occurrences256–256 Mya — about 0.1 occurrences256–255 Mya — about 0.1 occurrences255–255 Mya — about 0.1 occurrences255–254 Mya — about 0.1 occurrences254–254 Mya — about 0.0 occurrences251–251 Mya — about 0.5 occurrences251–250 Mya — about 2 occurrences250–250 Mya — about 2 occurrences250–249 Mya — about 2 occurrences249–249 Mya — about 2 occurrences249–248 Mya — about 10 occurrences248–248 Mya — about 17 occurrences248–247 Mya — about 17 occurrences247–247 Mya — about 15 occurrences254.14 Mya248.6 Mya260.4 Mya246.5 Mya

67 occurrences of Phaedrysmocheilus on record, most of them in the Early 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

67 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

9 formations

Zhitkov — 43.03°N, 131.93°EZhitkov — 42.93°N, 131.92°EZhitkov — 42.92°N, 132.30°EThaynes — 42.11°N, 111.26°WThaynes — 43.33°N, 111.26°WThaynes — 42.12°N, 111.25°WPastanakhskaya/Ystannakhskaya — 72.85°N, 120.98°ETartalinskaya — 44.36°N, 51.40°ESchmidt — 43.03°N, 131.93°EPastakh — 71.81°N, 127.24°EYstanakh — 71.81°N, 127.24°EKamenushka — 43.59°N, 132.17°EJulfa — 38.98°N, 45.53°E

Loading coastlines…

The named rock units Phaedrysmocheilus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 37 occurrences have no formation on record, which is common for older literature.

Phaedrysmocheilus and its relatives

Early Triassic

Where Phaedrysmocheilus and its relatives were recorded in the Early Triassic.

Found in the same rock

154 taxa

The Paleobiology Database records 56 sites for Phaedrysmocheilus, 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

16 references

Each of the 67 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. 4 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 content0

No picture of Phaedrysmocheilus was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Phaedrysmocheilus, or no answer at all. This entry cannot say which.

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itPleuronautilidae through timeFormations of the Early TriassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Shimansky and Erlanger 1955