Fossil - Skeleton visible only dorsal side

Collection: De Zigno Collection

Systematic- Paleontology

Reign: Animalia
Phylum/Division: Chordata (Vertebrata)
Class: Reptilia
Order: Chelonia
Family: Trionychidae
Scientific name: Trionyx schaurothianus Negri, 1893

Type status: Holotype

Geological age

Geochronology (Chronostratigraphy)

Eon (Eontema): Phanerozoic
Era (Eratema): Cenozoic
Period (System): Paleogene
Epoca (Serie): Oligocene
Age (Plain): Rupelian
Other chronological subdivisions: Lower Oligocene

Description: Trionychidae are common fossils in the Paleogene deposits from Veneto. Widespread even today, they are commonly known as "soft-shelled turtles" because the bones of the carapace plates are not covered by horny scales, but from a simple skin, although the shield maintains a certain consistency. They are aquatic forms, carnivorous, of medium or small size. For example the carapax of Trionyx sinensis (Southeast Asia) is about 20 cm long, while T. ferox from Florida can reach 40-50 cm in length. Their habitat consists of marshes and freshwater or brackish water, in tropical climate. The fossil Trionychidae are known in many European Tertiary formations, especially belonging to the interval from Eocene to Pliocene, in France, Germany, Belgium and England. In Italy numerous remains were found in Bolca (Verona), Monte Duello (Verona), Monteviale (Vicenza) and near Belluno.


Continent / Subcontinent: Europe
State : Italy
Region: Veneto
Province: Vicenza
Municipality: Monteviale
Place: Monteviale

Università degli Studi di Padova, Museo di Geologia e Paleontologia

Item code: 10818Z


  • Negri, 1893, p. 1, t. 2.
  • Bergounioux, 1954.
  • Kotsakis, 1984.
  • Pandolfi, L., Carnevale, G., Costeur, L., Del Favero, L., Fornasiero, M., Ghezzo, E., Maiorino, L., Mietto, P., Piras, P., Rook, L., Sansalone, G. and Kotsakis, T. Reassessing the earliest Oligocene vertebrate assemblage of Monteviale (Vicenza, Italy). p. 1-45. Journal of Systematic Palaeontology, 2016.