Alcobaça Formation
Stratigraphic range: Kimmeridgian
~
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; -9.0
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
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Celtedens Indeterminate Porto Pinheiro Albanerpetontid
Choristoderes of the Alcobaça Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
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
GenusSpeciesDistrictStratigraphic positionAbundanceNotesImages
Dacentrurus[5] D. armatus[5] Lisboa[5]
Ornithopoda[5] Indeterminate[5] Lisboa[5]
Stegosaurus[7] 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[5] T. cuneatus[5] Lisboa[5] Later determined to be indeterminate ornithischian remains.[5]

Saurischians

Indeterminate sauropod remains located in Leiria and Lisboa.[8]

Saurischians of the Alcobaça Formation
GenusSpeciesDistrictStratigraphic positionAbundanceNotesImages
Allosaurus[6] Indeterminate[6] Leiria[6]
Aviatyrannis A. jurassica Guimarota
Lusotitan[5] L. atalaiensis[5] Lisboa[5]
Ceratosaurus[5] Indeterminate[5] Lisboa[5]
Dinheirosaurus[5] D. lourinhanensis[5] Lisboa[5] "[Two] cervicals, [nine] dorsals, ribs, limb elements."[9]
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
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Peltochelys P. duchastelli Guimarota
Platychelys Indeterminate Guimarota
Pleurosternidae Indeterminate Guimarota

Lepidosauromorphs

Lepidosauromorphs of the Alcobaça Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
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

Crocodyliformes of the Alcobaça Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Goniopholis G. baryglyphaeus Guimarota A goniopholidid
Knoetschkesuchus K. guimarotae Guimarota An atoposaurid
Lisboasaurus L. mitracostatus Guimarota
Machimosaurus M. hugii Guimarota A marine machimosaurid

Mammals

Mammals of the Alcobaça Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
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
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. hdl:10316/79879. 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. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 "16.4 Distrito do Lisboa, Portugal; 1. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  6. 1 2 3 4 "16.1 Distrito do Leiria, Portugal; 3. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  7. Escaso, Fernando; Ortega, Francisco; Dantas, Pedro; Malafaia, Elisabete; Pimentel, Nuno L.; Pereda-Suberbiola, Xabier; Sanz, José Luis; Kullberg, José Carlos; Kullberg, María Carla (2006-12-23). "New evidence of shared dinosaur across Upper Jurassic Proto-North Atlantic: Stegosaurus from Portugal". Naturwissenschaften. 94 (5): 367–374. Bibcode:2007NW.....94..367E. doi:10.1007/s00114-006-0209-8. PMID 17187254. S2CID 10930309.
  8. "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.
  9. "Table 13.1," in Weishampel, et al. (2004). Page 265.
  10. Malafaia, E.; Ortega, F.; Escaso, F.; Dantas, P.; Pimentel, N.; Gasulla, J. M.; Ribeiro, B.; Barriga, F.; Sanz, J. L. (2010). "Vertebrate fauna at the Allosaurus fossil-site of Andrés (Upper Jurassic), Pombal, Portugal". Journal of Iberian Geology. 36 (2): 193–204. doi:10.5209/rev_JIGE.2010.v36.n2.7. ISSN 1698-6180.

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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