Alcobaça Formation

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Alcobaça Formation
Stratigraphic range: Kimmeridgian
~156.9–152.5 Ma
↓
TypeGeological formation
Sub-unitsCamadas de Guimarota
UnderliesLourinhã Formation
OverliesMontejunto Formation
Lithology
PrimaryMarl
OtherMudstone, coal, siltstone, limestone, sandstone
Location
Coordinates39°36′N 9°00′W / 39.6°N 9.0°W / 39.6; -9.0Coordinates: 39°36′N 9°00′W / 39.6°N 9.0°W / 39.6; -9.0
Approximate paleocoordinates33°42′N 1°36′E / 33.7°N 1.6°E / 33.7; 1.6
RegionEstremadura, Leiria, Lisboa
Country Portugal
ExtentLusitanian Basin
Type section
Named forAlcobaça, Portugal
Named byChoffat
Year defined1885
Alcobaça Formation is located in Portugal
Alcobaça Formation
Alcobaça Formation (Portugal)

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.

Vertebrate paleofauna[]

Dinosaur eggs are geographically located in Lisbon District, Portugal.[5] Dinosaur tracks are geographically located in Leiria District, Portugal.[6]

Amphibians[]

Amphibians of the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Celtedens Indeterminate Porto Pinheiro Albanerpetontid
Choristoderes of the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Cteniogenys Indeterminate Guimarota

Ornithischians[]

Indeterminate euornithopod remains located in Lisbon District.[5] Indeterminate stegosaurid remains present in Lisbon District.[5]

Ornithischians of the Alcobaça Formation
Genus Species District Stratigraphic position Abundance Notes Images
Dacentrurus[5] D. armatus[5] Lisboa[5]
Dacentrurus.png
Ornithopoda[5] Indeterminate[5] Lisboa[5]
Trimucrodon[5] T. cuneatus[5] Lisboa[5] Later determined to be indeterminate ornithischian remains.[5]

Saurischians[]

Indeterminate sauropod remains located in Leiria and Lisboa.[7]

Saurischians of the Alcobaça Formation
Genus Species District Stratigraphic position Abundance Notes Images
Allosaurus[6] Indeterminate[6] Leiria[6]
Allosaurus Revised.jpg
Aviatyrannis A. jurassica Guimarota
Lusotitan[5] L. atalaiensis[5] Lisboa[5]
Lusotitan.jpg
Ceratosaurus[5] Indeterminate[5] Lisboa[5]
Ceratosaurus nasicornis DB.jpg
Dinheirosaurus[5] D. lourinhanensis[5] Lisboa[5] "[Two] cervicals, [nine] dorsals, ribs, limb elements."[8]
Dinheirosaurus lourinhanensis.jpg
Lourinhasaurus[5] L. alenquerensis[5] Lisboa[5]
Megalosaurus[5] M. insignis[5] Lisboa[5] Later determined to be indeterminate theropod remains.[5]

Turtles[]

Turtles of the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
P. duchastelli Guimarota
Indeterminate Guimarota
Pleurosternidae Indeterminate Guimarota

Lepidosauromorphs[]

Lepidosauromorphs of the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Becklesius B. hoffstetteri Guimarota
Dorsetisaurus D. purbeckensis Guimarota
Marmoretta Indeterminate Guimarota Basal Lepidosauromorph
P. lignites Guimarota Stem-snake
Saurillodon S. proraformis Guimarota
S. henkeli, cf. obtusus Guimarota

Crocodyliformes[]

Crocodyliformes of the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Goniopholis G. baryglyphaeus Guimarota
Goniopholis BW.jpg
Knoetschkesuchus K. guimarotae Guimarota
Knoetschkesuchus2.jpg
Lisboasaurus L. mitracostatus Guimarota
Machimosaurus M. hugii Guimarota
Machimosaurus buffetDB11.jpg

Mammals[]

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
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
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
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
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
Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

See also[]

References[]

  1. ^ Mateus, O.; Dinis, J.; Cunha, P. P. (2017-09-28). "The Lourinhã Formation: the Upper Jurassic to lower most Cretaceous of the Lusitanian Basin, Portugal – landscapes where dinosaurs walked". Ciências da Terra / Earth Sciences Journal. 19 (1): 75–97. doi:10.21695/cterra/esj.v19i1.355. ISSN 2183-4431.
  2. ^ Fürsich, Franz T.; Schneider, Simon; Werner, Winfried; Lopez-Mir, Berta; Pierce, Colm S. (2021-09-13). "Life at the continental–marine interface: palaeoenvironments and biota of the Alcobaça Formation (Late Jurassic, Central Portugal), with a formal definition of the unit appended". Palaeobiodiversity and Palaeoenvironments. doi:10.1007/s12549-021-00496-x. ISSN 1867-1608.
  3. ^ "Guimarota". Paleobiology Database. Retrieved 31 August 2018.
  4. ^ "Porto Pinheiro, Lourinha". Paleobiology Database. Retrieved 31 August 2018.
  5. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac "16.4 Distrito do Lisboa, Portugal; 1. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  6. ^ a b c d "16.1 Distrito do Leiria, Portugal; 3. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  7. ^ "16.1 Distrito do Leiria, Portugal; 3. Camadas de Alcobaça," and "16.4 Distrito do Lisboa, Portugal; 1. Camadas de Alcobaça," in Weishampel, et al. (2004). Pages 548-549.
  8. ^ "Table 13.1," in Weishampel, et al. (2004). Page 265.

Bibliography[]

  • Weishampel, David B.; Peter Dodson, and Halszka (eds.) Osmólska. 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
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