| Alcobaça Formation | |
| Type: | Geological formation |
| Age: | Kimmeridgian ~ |
| Period: | Late Jurassic |
| Prilithology: | Marl |
| Otherlithology: | Mudstone, coal, siltstone, limestone, sandstone |
| Namedfor: | Alcobaça, Portugal |
| Year Ts: | 1885 |
| Region: | Estremadura, Leiria, Lisboa |
| Coordinates: | 39.6°N -9°W |
| Paleocoordinates: | 33.7°N 1.6°W |
| Subunits: | Camadas de Guimarota |
| Underlies: | Lourinhã Formation |
| Overlies: | Montejunto Formation |
| Extent: | Lusitanian Basin |
The Alcobaça Formation, previously known as the Guimarota Formation and also known as the Consolação Unit,[1] is a geological formation in Portugal.[2] It dates back to the Kimmeridgian stage of the Late Jurassic. It is an important source of information on the diversity of Late Jurassic mammals.[3] [4] Many of the fossils were collected from the now disused and flooded Camadas de Guimarota coal mine.
Dinosaur eggs are geographically located in Lisbon District, Portugal. Dinosaur tracks are geographically located in Leiria District, Portugal.
Indeterminate euornithopod remains located in Lisbon District. Indeterminate stegosaurid remains present in Lisbon District.
| Ornithischians of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | District | Stratigraphic position | Abundance | Notes | Images |
| Dacentrurus | D. armatus | Lisboa | ||||
| Ornithopoda | Indeterminate | Lisboa | ||||
| Stegosaurus[5] | S. cf. ungulatus | "...one tooth, five cervical vertebrae (including the axis), five dorsal vertebrae, cervical and dorsal ribs, three caudal vertebrae, chevrons, preacetabular process of the left ilium, right tibia, fibula, astragalus and [calcaneus], a cervical plate, and several fragments of plates." | ||||
| Trimucrodon | T. cuneatus | Lisboa | Later determined to be indeterminate ornithischian remains. | |||
Indeterminate sauropod remains located in Leiria and Lisboa.[6]
| Saurischians of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | District | Stratigraphic position | Abundance | Notes | Images |
| Allosaurus[7] | Indeterminate | Leiria | ||||
| Aviatyrannis | A. jurassica | Guimarota | ||||
| Lusotitan[8] | L. atalaiensis | Lisboa | ||||
| Ceratosaurus | Indeterminate | Lisboa | ||||
| Dinheirosaurus | D. lourinhanensis | Lisboa | "[Two] cervicals, [nine] dorsals, ribs, limb elements."[9] | |||
| Lourinhasaurus | L. alenquerensis | Lisboa | ||||
| Megalosaurus | M. insignis | Lisboa | Later determined to be indeterminate theropod remains. | |||
| Turtles of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Peltochelys | P. duchastelli | Guimarota | ||||
| Platychelys | Indeterminate | Guimarota | ||||
| Indeterminate | Guimarota | |||||
| Lepidosauromorphs of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Becklesius | B. hoffstetteri | Guimarota | Paramacellodid lizard | |||
| Dorsetisaurus | D. purbeckensis | Guimarota | Anguimorph lizard | |||
| Marmoretta | Indeterminate | Guimarota | Basal Lepidosauromorph | |||
| Portugalophis | P. lignites | Guimarota | Stem-snake | |||
| Saurillodon | S. proraformis | Guimarota | A lizard | |||
| Saurillus | S. henkeli, cf. obtusus | Guimarota | A lizard | |||
| cf. Opisthias[10] | Indeterminate | Andrés, Pombal | A rhynchocephalian | |||
| Crocodyliformes of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Goniopholis | G. baryglyphaeus | Guimarota | A goniopholidid | |||
| Knoetschkesuchus | K. guimarotae | Guimarota | An atoposaurid | |||
| Lisboasaurus | L. mitracostatus | Guimarota | ||||
| Machimosaurus | M. hugii | Guimarota | A marine machimosaurid | |||
| Mammals of the Alcobaça Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Bathmochoffatia | B. hapax | Guimarota | A paulchoffatiid multituberculate | |||
| Bernardodon | B. sp, B. atlanticus | Porto Pinheiro | A pinheirodontid multituberculate | |||
| Drescheratherium | D. acutum | Guimarota | A paurodontid dryolestidan | |||
| Dryolestes | D. leirensis | Guimarota | A dryolestid dryolestidan | |||
| Ecprepaulax | E. anomala | Porto Pinheiro | A pinheirodontid multituberculate | |||
| Guimarotodon | G. leiriensis | Guimarota | A paulchoffatiid multituberculate | |||
| Guimarotodus | G. inflatus | Guimarota | A dryolestid dryolestidan | |||
| Haldanodon | H. exspectatus | Guimarota | A docodont | |||
| Henkelodon | H. naias, H. sp | Guimarota | A paulchoffatiid multituberculate | |||
| Henkelotherium | H. guimarotae | Guimarota | A dryolestidan | |||
| Iberodon | I. quadrituberculatus | Porto Pinheiro | A pinheirodontid multituberculate | |||
| Kielanodon | K. hopsoni | Guimarota | A paulchoffatiid multituberculate | |||
| Krebsotherium | K. lusitanicum | Guimarota | A dryolestid dryolestidan | |||
| Kuehneodon | K. guimarotensis, K. dietrichi, K. simpsoni, K. uniradiculatus, K. sp | Guimarota | A paulchoffatiid multituberculate | |||
| Laolestes | L. andresi | Porto Pinheiro | A dryolestid dryolestidan | |||
| Meketibolodon | M. robustus | Guimarota | A paulchoffatiid multituberculate | |||
| Meketichoffatia | M. krausei, M. sp | Guimarota | A paulchoffatiid multituberculate | |||
| Nanolestes | N. krusati | Porto Pinheiro | A cladotherian | |||
| N. drescherae | Guimarota | |||||
| Paulchoffatia | P. delgadoi | Guimarota | A paulchoffatiid multituberculate | |||
| Pinheirodon | P. sp, P. vastus, P. pygmaeus | Porto Pinheiro | A pinheirodontid multituberculate | |||
| Plesiochoffatia | P. thoas, P. peperethos | Guimarota | A paulchoffatiid multituberculate | |||
| Portopinheirodon | P. asymmetricus | Porto Pinheiro | A dryolestid dryolestidan | |||
| Priacodon | Indeterminate | Porto Pinheiro | A triconodontid | |||
| Proalbionbaatar | P. plagiocyrtus | Guimarota | A multituberculate of uncertain placement | |||
| Pseudobolodon | P. dryas, P krebsi, P. oreas | Guimarota | A paulchoffatiid multituberculate | |||
| Renatodon | R. amalthea | Guimarota | A paulchoffatiid multituberculate | |||
| ? Tinodon | Indeterminate | Porto Pinheiro | A tinodontid symmetrodont | |||
| Xenachoffatia | X. oinopion | Guimarota | A paulchoffatiid multituberculate | |||
| Paulchoffatiidae | Indeterminate | Guimarota | 4 distinct genera with 7 species | |||
| Pinheirodontidae | Indeterminate | Porto Pinheiro | ||||