Spheroolithidae

Spheroolithidae is an oofamily of dinosaur eggs. It contains Guegoolithus, Spheroolithus, and Paraspheroolithus. Like modern birds, the eggshell membrane formed before the calcareous part of the shell.

Spheroolithidae

Daderot · Public Domain · 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
HadrosauroideaPBDB
Diet
herbivorePBDB, for Ornithopoda
Life habit
ground dwelling, gregariousPBDB, for Ornithischia
Motility
actively mobilePBDB, for Ornithischia
Environment
terrestrialPBDB, for Ornithischia

Time the record covers

At least 64 million years on record.

The record covers at least 137.05 Mya to 72.2 Mya. No occurrence read is dated outside 139.1 Mya to 66 Mya.

Early Cretaceous — about 11 of 83 occurrencesEarly CretaceousLate Cretaceous — about 72 of 83 occurrencesLate CretaceousPaleocene — about 0 of 83 occurrences141–138 Mya — about 0.5 occurrences138–135 Mya — about 0.6 occurrences135–133 Mya — about 0.2 occurrences133–130 Mya — about 0.2 occurrences130–128 Mya — about 0.2 occurrences128–125 Mya — about 0.6 occurrences125–123 Mya — about 2 occurrences123–120 Mya — about 2 occurrences120–118 Mya — about 0.7 occurrences118–115 Mya — about 0.7 occurrences115–113 Mya — about 0.8 occurrences113–110 Mya — about 1 occurrence110–108 Mya — about 0.4 occurrences108–105 Mya — about 0.4 occurrences105–103 Mya — about 0.4 occurrences103–100 Mya — about 0.7 occurrences100–97 Mya — about 2 occurrences97–95 Mya — about 2 occurrences95–92 Mya — about 2 occurrences92–90 Mya — about 1 occurrence90–87 Mya — about 5 occurrences87–85 Mya — about 6 occurrences85–82 Mya — about 7 occurrences82–80 Mya — about 7 occurrences80–77 Mya — about 7 occurrences77–75 Mya — about 7 occurrences75–72 Mya — about 7 occurrences72–70 Mya — about 7 occurrences70–67 Mya — about 7 occurrences67–65 Mya — about 3 occurrences137.05 Mya72.2 Mya141 Mya65 Mya

83 occurrences of Spheroolithidae on record, most of them in the Late Cretaceous. 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

34 formations

Nemegt — 43.85°N, 100.48°ENemegt — 44.07°N, 102.67°ENemegt — 43.87°N, 100.01°ENemegt — 43.48°N, 100.36°ENemegt — 43.60°N, 100.46°ENemegt — 43.58°N, 107.69°EZhaoying — 33.24°N, 111.68°ETwo Medicine — 47.82°N, 112.66°WTwo Medicine — 47.71°N, 112.22°WBaruungoyot — 42.51°N, 105.25°EBaruungoyot — 43.66°N, 107.84°EBaruungoyot — 44.44°N, 109.78°EBaruungoyot — 43.32°N, 99.83°EBaruungoyot — 42.29°N, 105.74°EJingangkou — 36.93°N, 120.73°ECedar Mountain — 39.05°N, 111.04°WCedar Mountain — 38.64°N, 111.27°WCedar Mountain — 38.85°N, 111.15°WCedar Mountain — 38.94°N, 111.08°WOldman — 49.28°N, 112.58°WOldman — 49.14°N, 112.58°WOldman — 50.75°N, 111.51°WQuantou — 43.59°N, 124.89°EQuantou — 42.88°N, 124.18°EDjadokhta — 44.52°N, 103.15°EDjadokhta — 44.16°N, 103.69°EDjadokhta — 44.05°N, 102.82°EGaogou — 33.19°N, 111.79°EGaogou — 33.05°N, 111.39°EBlesa — 40.95°N, 0.77°WEl Gallo — 30.07°N, 115.78°WIren Dabasu — 43.83°N, 112.43°EIren Dabasu — 43.73°N, 112.18°EDinosaur Park — 50.75°N, 111.51°WDinosaur Park — 50.75°N, 111.47°WJiangjunding — 36.93°N, 120.66°EMajiacun — 33.30°N, 111.48°EMajiacun — 33.50°N, 112.88°ENorth Horn — 39.17°N, 111.27°WSanshui — 23.20°N, 113.27°ESanshui — 23.06°N, 113.23°ELameta — 20.72°N, 78.32°ELameta — 20.68°N, 79.35°EBaynshire — 43.94°N, 101.33°EAllen — 40.45°S, 66.62°WCerro del Pueblo — 25.67°N, 101.30°WPingling — 25.25°N, 114.61°EVillanueva de Huerva — 41.34°N, 1.04°W

Loading coastlines…

The named rock units Spheroolithidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 10 further formations hold fewer occurrences each and are not listed. 2 occurrences have no formation on record, which is common for older literature.

Spheroolithidae and its relatives

Late Cretaceous

Where Spheroolithidae and its relatives were recorded in the Late Cretaceous.

Found in the same rock

324 taxa

The Paleobiology Database records 76 sites for Spheroolithidae, 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

44 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. 32 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 Spheroolithidae

Credit
Daderot
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Spheroolithidae 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 itHadrosauroidea through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Zhao 1979