Oxytoma

Oxytoma is an extinct genus of bivalve molluscs that lived from the Late Permian to the early Paleocene, with a worldwide distribution except Australia. The genus was named in 1864 by Fielding Bradford Meek.

Oxytoma

H. Zell · 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
OxytomidaePBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
stationary, attachedPBDB
Vision
blindPBDB, for Bivalvia
Environment
marinePBDB, for Pectinida

Time the record covers

At least 193 million years on record.

The record covers at least 259.857 Mya to 66 Mya. No occurrence read is dated outside 264.28 Mya to 61.66 Mya.

Permian — about 3 of 804 occurrencesEarly Triassic — about 2 of 804 occurrencesMiddle Triassic — about 11 of 804 occurrencesLate Triassic — about 124 of 804 occurrencesLate TriassicEarly Jurassic — about 363 of 804 occurrencesEarly JurassicMiddle Jurassic — about 101 of 804 occurrencesLate Jurassic — about 79 of 804 occurrencesLate JurassicEarly Cretaceous — about 52 of 804 occurrencesEarly CretaceousLate Cretaceous — about 68 of 804 occurrencesLate CretaceousPaleocene — about 1 of 804 occurrences268–261 Mya — about 0.7 occurrences261–254 Mya — about 2 occurrences254–247 Mya — about 2 occurrences247–240 Mya — about 6 occurrences240–233 Mya — about 14 occurrences233–226 Mya — about 10 occurrences226–219 Mya — about 28 occurrences219–212 Mya — about 25 occurrences212–205 Mya — about 27 occurrences205–198 Mya — about 71 occurrences198–191 Mya — about 128 occurrences191–184 Mya — about 151 occurrences184–177 Mya — about 35 occurrences177–170 Mya — about 35 occurrences170–163 Mya — about 58 occurrences163–156 Mya — about 34 occurrences156–149 Mya — about 15 occurrences149–142 Mya — about 48 occurrences142–135 Mya — about 24 occurrences135–128 Mya — about 10 occurrences128–121 Mya — about 4 occurrences121–114 Mya — about 2 occurrences114–107 Mya — about 6 occurrences107–100 Mya — about 3 occurrences100–93 Mya — about 5 occurrences93–86 Mya — about 10 occurrences86–79 Mya — about 12 occurrences79–72 Mya — about 15 occurrences72–65 Mya — about 26 occurrences65–58 Mya — about 0.7 occurrences259.857 Mya66 Mya268 Mya58 Mya

804 occurrences of Oxytoma on record, most of them in the Early Jurassic. 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

804 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

156 formations

Kap Leslie — 70.48°N, 21.97°WPeschanka — 43.25°N, 131.72°EPeschanka — 43.30°N, 132.05°EPeschanka — 43.32°N, 131.83°EPeschanka — 43.45°N, 131.77°EPeschanka — 43.65°N, 131.80°EPeschanka — 43.47°N, 132.05°EPeschanka — 43.55°N, 131.98°EPeschanka — 43.63°N, 132.40°EPeschanka — 43.80°N, 132.17°EPeschanka — 43.67°N, 132.05°EPeschanka — 43.83°N, 132.13°EPeschanka — 43.78°N, 132.33°EPeschanka — 43.47°N, 132.37°ELower Lias — 51.80°N, 1.88°WFernie — 52.35°N, 117.05°WFernie — 53.57°N, 116.43°WFernie — 49.52°N, 115.08°WFernie — 50.62°N, 115.17°WFernie — 51.92°N, 115.43°WFernie — 52.47°N, 115.78°WFernie — 57.05°N, 122.87°WFernie — 53.25°N, 118.25°WFernie — 51.97°N, 115.24°WFernie — 52.25°N, 115.67°WFernie — 50.10°N, 122.98°WFernie — 56.03°N, 123.05°WCape Stewart Beds — 70.44°N, 22.64°WCape Stewart Beds — 70.46°N, 22.71°WCape Stewart Beds — 70.47°N, 22.64°WCleveland Ironstone — 54.45°N, 0.57°WWhitby Mudstone — 54.45°N, 0.57°WChari — 23.50°N, 70.50°EKalchreuth — 49.55°N, 11.13°EDhruma — 24.23°N, 46.58°EDhruma — 22.62°N, 46.00°EDhruma — 22.53°N, 46.17°EDhruma — 23.97°N, 46.17°EDhruma — 23.97°N, 46.00°EDhruma — 23.08°N, 46.33°EDhruma — 22.83°N, 46.83°EDhruma — 21.88°N, 45.83°EKossen — 47.55°N, 12.17°EKossen — 47.47°N, 11.65°EKossen — 47.66°N, 12.45°EKossen — 47.58°N, 12.57°ECalcaire a gryphees — 48.00°N, 6.00°EMaude — 53.20°N, 132.05°WMaude — 53.17°N, 132.03°WMaude — 53.42°N, 132.27°WPawkowki — 49.10°N, 111.15°WPawkowki — 49.10°N, 111.35°WPawkowki — 49.10°N, 111.21°WPawkowki — 49.01°N, 111.21°WPawkowki — 49.10°N, 112.14°WPawkowki — 49.19°N, 111.89°WAmaltheenton — 49.79°N, 11.04°EAmaltheenton — 52.25°N, 7.85°EAmaltheenton — 52.05°N, 8.30°EAmaltheenton — 49.35°N, 11.36°EPaksa — 73.00°N, 113.00°EHabo beds — 23.20°N, 69.80°ETolo Channel — 22.45°N, 114.28°ETolo Channel — 22.49°N, 114.32°EPierre Shale — 43.25°N, 104.27°WPierre Shale — 43.31°N, 104.22°WKoessen — 47.00°N, 13.00°EKoessen — 47.71°N, 13.20°EKoessen — 47.67°N, 12.70°EKingak — 68.33°N, 137.75°WKingak — 68.16°N, 138.04°WKingak — 68.05°N, 138.07°WCape Stewart — 70.45°N, 22.65°WCape Stewart — 70.44°N, 22.65°WCape Stewart — 70.47°N, 22.36°WCape Stewart — 70.46°N, 22.33°WAgardhfjellet — 78.10°N, 13.91°EAlmstrom Creek — 68.23°N, 135.93°WAlmstrom Creek — 68.07°N, 135.48°W

Loading coastlines…

The named rock units Oxytoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 132 further formations hold fewer occurrences each and are not listed. 313 occurrences have no formation on record, which is common for older literature.

Oxytoma and its relatives

Early Jurassic

Where Oxytoma and its relatives were recorded in the Early Jurassic.

Found in the same rock

1,364 taxa

The Paleobiology Database records 656 sites for Oxytoma, and this reads 240 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

176 references

Each of the 804 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. 164 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 Oxytoma

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

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 itOxytomidae through timeFormations of the Early JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Meek and Hayden 1865)