Megadesmus

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

On record

Recorded, not inferred
Sits inside
MegadesmidaePBDB
Diet
suspension feederPBDB, for Pholadomyida
Life habit
infaunalPBDB, for Pholadomyida
Motility
facultatively mobilePBDB, for Pholadomyida
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 58 million years on record.

The record covers at least 307.4 Mya to 248.6 Mya. No occurrence read is dated outside 330.3 Mya to 247 Mya.

Carboniferous — about 2 of 83 occurrencesCarboniferousPermian — about 75 of 83 occurrencesPermianEarly Triassic — about 6 of 83 occurrencesMiddle Triassic — about 0 of 83 occurrences332–329 Mya — about 0.1 occurrences329–326 Mya — about 0.1 occurrences326–323 Mya — about 0.1 occurrences323–320 Mya — about 0.2 occurrences320–318 Mya — about 0.2 occurrences318–315 Mya — about 0.2 occurrences315–312 Mya — about 0.2 occurrences312–309 Mya — about 0.2 occurrences309–306 Mya — about 0.2 occurrences306–303 Mya — about 0.1 occurrences303–300 Mya — about 0.1 occurrences300–297 Mya — about 0.9 occurrences297–294 Mya — about 2 occurrences294–292 Mya — about 9 occurrences292–289 Mya — about 8 occurrences289–286 Mya — about 3 occurrences286–283 Mya — about 3 occurrences283–280 Mya — about 2 occurrences280–277 Mya — about 2 occurrences277–274 Mya — about 2 occurrences274–271 Mya — about 4 occurrences271–268 Mya — about 4 occurrences268–266 Mya — about 9 occurrences266–263 Mya — about 7 occurrences263–260 Mya — about 2 occurrences260–257 Mya — about 7 occurrences257–254 Mya — about 7 occurrences254–251 Mya — about 1 occurrence251–248 Mya — about 1 occurrence248–245 Mya — about 5 occurrences307.4 Mya248.6 Mya332 Mya245 Mya

83 occurrences of Megadesmus 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

83 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

36 formations

Blenheim — 20.93°S, 148.12°EBlenheim — 21.47°S, 148.52°EBlenheim — 20.74°S, 147.95°EBlenheim — 20.61°S, 147.85°EBlenheim — 20.55°S, 147.85°EBlenheim — 20.60°S, 147.76°EGerringong — 34.42°S, 150.91°EGerringong — 34.50°S, 150.85°EVostochnotaimyrskaya — 74.89°N, 107.99°EVostochnotaimyrskaya — 74.60°N, 106.30°EWasp Head — 35.67°S, 150.31°EWandrawandian — 34.88°S, 150.46°EWandrawandian — 34.87°S, 150.40°EWandrawandian — 34.83°S, 150.38°EFerntree — 43.00°S, 147.33°EFerntree — 42.92°S, 147.26°EFerntree — 42.78°S, 147.37°ETiverton — 20.93°S, 148.14°ETiverton — 21.49°S, 148.55°EGebbie — 20.93°S, 148.13°EChumik — 33.00°N, 77.39°EAbels Bay — 43.18°S, 147.24°ELekvorkuta — 67.68°N, 64.18°ELekvorkuta — 68.80°N, 65.00°ELizzie Creek — 21.20°S, 148.32°ELizzie Creek — 22.03°S, 149.18°EPalmarito — 8.03°N, 71.35°WSenja — 29.48°N, 82.90°EMangarewa — 45.79°S, 167.96°EBurnett — 24.95°S, 151.35°ECallytharra — 25.50°S, 115.90°EWardak — 34.08°N, 68.48°EZhanjin — 33.72°N, 80.35°EQudi — 33.72°N, 80.35°EImtachan — 62.50°N, 139.00°EYstanakhskaya — 74.89°N, 107.99°EKhuren — 60.88°N, 147.29°EMalbina — 42.75°S, 147.18°E

Loading coastlines…

The named rock units Megadesmus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 further formations hold fewer occurrences each and are not listed. 10 occurrences have no formation on record, which is common for older literature.

Megadesmus and its relatives

Permian

Where Megadesmus and its relatives were recorded in the Permian.

Found in the same rock

333 taxa

The Paleobiology Database records 77 sites for Megadesmus, 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

34 references

Each of the 83 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. 22 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 Megadesmus was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

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

No 3D scan of Megadesmus 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itMegadesmidae through timeFormations of the PermianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Sowerby 1838