Villalba de la Sierra Formation
Geologic formation in Spain
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The Villalba de la Sierra Formation is a Campanian to Maastrichtian geologic formation in Spain. Fossil dinosaur eggs have been reported from the formation, that comprises gypsiferous, grey, argillaceous mudstones and sandstones, deposited in a floodplain environment[1][2] characterised by high seasonality and variability in water availability.[3]
| Villalba de la Sierra Formation | |
|---|---|
| Stratigraphic range: Campanian-Maastrichtian ~ | |
Excavation of a titanosaur at Lo Hueco | |
| Type | Geological formation |
| Lithology | |
| Primary | Mudstone |
| Other | Sandstone, gypsum |
| Location | |
| Coordinates | 40.0°N 2.0°W |
| Approximate paleocoordinates | 30.7°N 0.6°W |
| Region | Castilla-La Mancha |
| Country | Spain |
| Extent | Iberian Ranges |
| Type section | |
| Named for | Villalba de la Sierra |
  Villalba de la Sierra Formation (Spain) | |
Fossil content
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Dinosaur
Sauropods
| Sauropods of the Villalba de la Sierra Formation | |||||
|---|---|---|---|---|---|
| Taxon/ootaxon | Species/oospecies | Presence | Materials | Notes | Images |
| Lohuecotitan[4] | L. pandafilandi | Lo Hueco. | A disarticulated partial skeleton | A titanosaurian sauropod | |
| Qunkasaura[5] | Q. pintiquiniestra | Lo Hueco. | A partial skeleton belonging to a single individual. | A opisthocoelicaudiine saltasaurid; closely related to Abditosaurus kuehnei. |  |
| Litosoolithus[6] | L. poyosi | Poyos. | Multiple partial to almost complete eggs and clutches. | Very large fusioolithid titanosaurian eggs with very thin eggshells and dispersituberculated ornamentation. | |
| Fusioolithus[7] | F. baghensis | Poyos. | Multiple partial to almost complete eggs and clutches. | Widespread fusioolithid titanosaurian eggs with ridged compactituberculated ornamentation. | |
| Megaloolithus[8] | M. siruguei | Portilla. | Isolated eggshells. | European megaloolithid titanosaurian eggs with thick eggshells and compactituberculated ornamentation. | |
Theropods
| Theropods of the Villalba de la Sierra Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Abelisauridae indet.[9] | Indeterminate | Poyos | Teeth, cranial and postcranial elements | An abelisaurid theropod; closely related to Arcovenator escotae. | |
| Velociraptorinae indet.[10] | Indeterminate | A velociraptorine dromaeosaurid | |||
Reptiles
Crocodiles
| Crocodiles of the Villalba de la Sierra Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Agaresuchus[11] | A. fontisensis | A allodaposuchid eusuchian | |||
| Lohuecosuchus[12] | L. megadontos | A allodaposuchid eusuchian | |||
| Musturzabalsuchus | M. sp | A allodaposuchid eusuchian | |||
Turtles
| Turtles of the Villalba de la Sierra Formation | |||||
|---|---|---|---|---|---|
| Taxon | Species | Presence | Materials | Notes | Images |
| Foxemys[13] | F. mechinorum | A bothremydid side-necked turtle | |||
| Iberoccitanemys[14] | I. convenarum | A bothremydid side-necked turtle | |||