Egg type
Fusioolithus
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 5 countries, most often India and Spain.
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 11 October 2026- Named by
- Fernández and Khosla 2015
medium
medium: 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
medium
medium: 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
medium
medium: Only PBDB gives this; nothing contradicts it.Omnisaura calculation83.6–66 million years ago, from its dated fossil recordsmedium
medium: Omnisaura's calculation from 61 confirmed PBDB records.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Found in
- ArgentinaFrance
medium
medium: Only PBDB records it (12 records).Indiamedium
medium: Only PBDB records it (2 records).Perumedium
medium: Only PBDB records it (28 records).Spainmedium
medium: Only PBDB records it (2 records).medium
medium: Only PBDB records it (17 records).Sources
Given by: Paleobiology Database. How it was chosen: Union of all sources (ISO 3166).
- Rock formations
- AllenArén
medium
medium: Only PBDB records it (8 records).Baguamedium
medium: Only PBDB records it (2 records).Chorrillomedium
medium: Only PBDB records it (2 records).Conquesmedium
medium: Only PBDB records it (4 records).La Posamedium
medium: Only PBDB records it (5 records).Lametamedium
medium: Only PBDB records it (4 records).Lower Red Garumnianmedium
medium: Only PBDB records it (24 records).Calcaire de Rognacmedium
medium: Only PBDB records it (3 records).Kallamedulow
low: Only one PBDB record.Taklilow
low: Only one PBDB record.Talarnlow
low: Only one PBDB record.low
low: Only one PBDB record.mixed
mixed: 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
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Parent group
- Fusioolithidae
medium
medium: Only PBDB gives this; nothing contradicts it.Sources
Given by: Paleobiology Database. How it was chosen: PBDB leads.
- Species named in its records
- Fusioolithus baghensis, Fusioolithus berthei, Fusioolithus mohabeyi, Fusioolithus padiyalensis
Sources
Given by: Paleobiology Database (the species its fossil records are identified as).
- Older or other names
- Patagoolithus (a junior synonym)
Sources
Given by: Paleobiology Database (names it treats as this genus).
- 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.
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 and appearance aren't covered yet, and diet and way of life only as PBDB infers them for the wider group. Omnisaura leaves the rest 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.
Connections
Genera linked to Fusioolithus by where and when their fossils were found, by classification and by who named them. Select a name to open its page.
Found in the same rocks 33
Genera and other fossil types from the same rock units, from rocks of overlapping age, the most shared fossil sites first.
Found in India 9
Other genera found in India, from rocks of overlapping age, the most fossil sites there first.
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