Omnisaura
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Egg type

Fusioolithus

Fernández and Khosla 2015

Fusioolithus is an egg type: the name is for the fossil eggs themselves. The animal that laid them is not known for certain. Its eggs are found in rocks 83.6–66 million years old in 4 countries, most often India and Spain.

Confidence labels
How sure are we?0 high18 medium4 lowHow we rate confidence

Confidence labels are switched off. Facts with low confidence, or where sources disagree, still carry a small dot: tap it for the reason.

At a glance

Data as of 12 October 2026
83.6–66 Ma
Triassic
Jurassic
Cretaceous
252 million years ago20114366

The last non-bird dinosaurs died out 66 million years ago. That's as far from us as the end of this bar.

Named by
Fernández and Khosla 2015
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Described in
M. S. Fernández, A. Khosla (2015). Parataxonomic review of the Upper Cretaceous dinosaur eggshells belonging to the oofamily Megaloolithidae from India and Argentina. Historical Biology 27(2): 158–180. Read it
mediummedium: Only PBDB gives this; its author and year match the naming authority (Fernández and Khosla 2015).
Sources

Given by: Paleobiology Database. The publication the Paleobiology Database gives as the authority for this genus name, usually the one that first named and described it.

Dated to
Campanian to Maastrichtian, 83.6–66 million years ago
mediummedium: Only PBDB gives this; nothing contradicts it.
Omnisaura calculation83.6–66 million years ago, from its dated fossil records
mediummedium: Omnisaura's calculation from 61 confirmed PBDB records.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Found in
Argentina
mediummedium: Only PBDB records it (12 records).
France
mediummedium: Only PBDB records it (2 records).
India
mediummedium: Only PBDB records it (28 records).
Spain
mediummedium: Only PBDB records it (17 records).
Sources

Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).

Rock formations
Allen
mediummedium: Only PBDB records it (8 records).
Arén
mediummedium: Only PBDB records it (2 records).
Bagua
mediummedium: Only PBDB records it (2 records).
Chorrillo
mediummedium: Only PBDB records it (4 records).
Conques
mediummedium: Only PBDB records it (5 records).
La Posa
mediummedium: Only PBDB records it (4 records).
Lameta
mediummedium: Only PBDB records it (24 records).
Lower Red Garumnian
mediummedium: Only PBDB records it (3 records).
Calcaire de Rognac
lowlow: Only one PBDB record.
Kallamedu
lowlow: Only one PBDB record.
Takli
lowlow: Only one PBDB record.
Talarn
lowlow: Only one PBDB record.
mixedmixed: Levels differ between entries; each has its own.
Sources

Given by: Paleobiology Database. How it was chosen: Canonical names, automatic and editor-approved matches applied.

Egg family
Fusioolithidae
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Parent group
Fusioolithidae
mediummedium: Only PBDB gives this; nothing contradicts it.
Sources

Given by: Paleobiology Database. How it was chosen: PBDB leads.

Known from
Eggs
Sources

Given by: Paleobiology Database (what the name was based on).

Laid by
Not known for certain. Eggs rarely show which animal laid them.
Sources: Paleobiology Database (CC BY 4.0)Confidence levels and gaps are Omnisaura's own assessment.

Gaps are answers

What isn't known yet

  • The animal that laid them: not known for certain, as for most egg types.
  • Type species: no source we use gives it yet.
  • Order: no source we use gives it yet.
  • Common names: no source we use gives it yet.
  • What it was named after: no source we use gives it yet.
  • Resting on one source: 5 facts come from a single source with nothing against them (rated medium): name (PBDB); authority (PBDB); parent group (PBDB); family (PBDB); age (headline) (PBDB).

Size, diet and behaviour aren't covered yet. Omnisaura leaves them out rather than guess.

Where sources disagree

None open. Where our sources overlap, they agree on everything shown here.

Did it meet…?

?

Same time, different places. Their fossils overlap in age, 83.6 to 66 million years ago, but no rock formation holds both.

Going by the ages and rock formations of their dated fossils, as on the map. Compare their fossil sites on the map.

Found in the same rocks

Genera and other fossil types from the same formations, from rocks of the same age.

MegaloolithusHadrosauropodusPrismatoolithusPararhabdodonIsisaurusNullotitanAustroraptorIsasicursorKankRocasaurusSankofaAbditosaurusAbelisaurusAdynomosaurusAeolosaurusAgeroolithusand 17 more

Credits

Where this page comes from

  • Paleobiology DatabaseCC BY 4.0 · fossil records, ages, classification
  • OmnisauraOmnisaura editorial · confidence levels and gaps
  • PaleoMAP PaleoCoastlines (Kocsis and Scotese 2021)CC BY 4.0 · ancient coastlines on the small map
  • Natural EarthPublic domain · today's coastlines