Ageroolithus

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Dinosaur egg

title: "Ageroolithus" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["dinosaur-reproduction", "fossil-parataxa-described-in-1997"] description: "Dinosaur egg" topic_path: "general/dinosaur-reproduction" source: "https://en.wikipedia.org/wiki/Ageroolithus" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Dinosaur egg ::

|fossil_range = |taxon = Ageroolithus |authority = Vianey-Liaud and López-Martínez, 1997 |subdivision_ranks = Oospecies |subdivision =

  • A. fontllongensis Vianey-Liaud and Lopez-Martinez, 1997

Ageroolithus is an oogenus of dinosaur egg. It may have been laid by a theropod.

Distribution

Ageroolithus fossils are found in the early Maastrichtian Tremp Basin of Lleida, Spain, from the Upper Cretaceous of France, and from the Lower Cretaceous of Galve, Spain.

History

Ageroolithus was first discovered and described in 1997 by the French paleontologist Monique Vianey-Liaud and the Spanish paleontologist Nieves López Martínez while excavating the Tremp Basin in Spain. Further specimens were discovered in Galve in 1998 and in France in 2000. In 2012, Albert Sellés described Ageroolithus-like eggshells from the Tremp Basin in his PhD thesis at the Universitat de Barcelona.

Description

Ageroolithus fontllongensis was first described on the basis of nine eggshell fragments. and cf. Ageroolithus. The eggshell has a smooth surface, and at 25–36 mm thick is thinner than most other eggs of the ratite morphotype.) is not clearly divided into units. It has narrow, straight pore canals measuring 15 to 25 μm in diameter.

The specimens referred to cf. Ageroolithus by Sellés in 2012 are very similar to Ageroolithus in thickness, ornamentation, and the ratio between prismatic and mammillary layers. They differ from Ageroolithus because their shell is composed of three structural layers instead of two.

Parataxonomy

Ageroolithus has not been placed in any known oofamily, but it is classified in the ratite morphotype, alongside Elongatoolithidae, Laevisoolithidae, Medioolithidae, and Ornitholithidae. It contains a single oospecies: A. fontllongensis.

References

References

  1. (1997). "Late Cretaceous Dinosaur Eggshells from the Tremp Basin, Southern Pyrenees, Lleida, Spain". Journal of Paleontology.
  2. Some more recently described eggshell fragments have been referred to ''A.'' [[aff.]] ''fontllongensis''Ruiz-Omeñaca, J. I., Canudo, J. I., Aurell, M., Bádenas, B., Barco, J. L., Cuenca-Bescós, G., & Ipas, J. (2004). Estado de las investigaciones sobre los vertebrados del Jurásico Superior y Cretácico Inferior de Galve (Teruel). Estudios Geológicos, 60(3-6), 179-202.
  3. Selles, Albert G.. (2012). "Oological Record of Dinosaurs in South-Central Pyrenees (SW Europe): Parataxonomy, diversity and biostratigraphical implications". Universitat de Barcelona.
  4. Konstantin E. Mikhailov, Emily S. Bray & Karl E. Hirsch. (1996). "Parataxonomy of fossil egg remains (Veterovata): basic principles and applications". [[Journal of Vertebrate Paleontology]].

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