Clarkina

Clarkina is an extinct genus of conodonts. It is considered to be an offshore, outer shelf or basinal, deep-water taxon.

No picture of Clarkina 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 Clarkina, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
GondolellidaePBDB
Diet
carnivorePBDB, for Conodonta
Life habit
nektonicPBDB, for Conodonta
Motility
actively mobilePBDB, for Conodonta
Vision
well-developedPBDB, for Conodonta

Time the record covers

At least 98 million years on record.

The record covers at least 259.857 Mya to 161.5 Mya. No occurrence read is dated outside 264.28 Mya to 154.8 Mya.

Permian — about 103 of 144 occurrencesPermianEarly Triassic — about 40 of 144 occurrencesMiddle Triassic — about 0 of 144 occurrencesLate Triassic — about 0 of 144 occurrencesEarly Jurassic — about 0 of 144 occurrencesMiddle Jurassic — about 0 of 144 occurrencesLate Jurassic — about 1 of 144 occurrences266–263 Mya — about 0.7 occurrences263–259 Mya — about 3 occurrences259–255 Mya — about 8 occurrences255–251 Mya — about 116 occurrences251–247 Mya — about 15 occurrences164–160 Mya — about 0.2 occurrences160–156 Mya — about 0.6 occurrences156–153 Mya — about 0.2 occurrences259.857 Mya161.5 Mya266 Mya153 Mya

144 occurrences of Clarkina 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

144 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

17 formations

Changxing — 31.10°N, 119.73°EChangxing — 29.49°N, 106.40°EChangxing — 30.17°N, 109.00°EDalong — 32.62°N, 105.86°EDalong — 32.65°N, 105.88°EChangxing Limestone — 31.10°N, 119.73°EKangshare — 28.67°N, 85.82°EKangshare — 28.65°N, 85.83°EDaye — 30.17°N, 109.00°ETransitional Bed — 31.00°N, 120.00°ETalung — 23.70°N, 109.32°EDinwoody — 41.55°N, 114.14°WKhunamuh — 34.00°N, 75.00°EMajiaoling — 23.35°N, 106.02°EFeixianguan — 32.31°N, 105.46°EWujiaping — 32.62°N, 105.86°EChandalaz — 42.83°N, 132.90°EChandalaz — 42.92°N, 133.05°EQinglong — 31.00°N, 120.00°EChanghsing — 30.90°N, 119.93°EHashikadani — 35.68°N, 136.58°ELinghao — 24.40°N, 106.30°E

Loading coastlines…

The named rock units Clarkina has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 occurrences have no formation on record, which is common for older literature.

Clarkina and its relatives

Permian

Where Clarkina and its relatives were recorded in the Permian.

Found in the same rock

232 taxa

The Paleobiology Database records 68 sites for Clarkina, 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 144 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 content0

No picture of Clarkina 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 Clarkina, 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 itGondolellidae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Kozur 1990