Alcobaça Formation

The Alcobaça Formation is a geological formation in Portugal. It dates back to the Oxfordian stage of the Late Jurassic.[1] It is an important source of information on the diversity of Late Jurassic mammals.[2][3] Many of the fossils were collected from the now disused and flooded Camadas de Guimarota coal mine.

Alcobaça Formation
Stratigraphic range: Late Jurassic Oxfordian–Kimmeridgian
TypeGeological formation
UnderliesLourinhã Formation
Lithology
PrimaryMarl
OtherMudstone, Coal
Location
Country Portugal
Type section
Named forAlcobaça, Portugal
Named byChoffat
Year defined1885

Vertebrate fauna

Dinosaur eggs are geographically located in Lisbon District, Portugal.[4] Dinosaur tracks are geographically located in Leiria District, Portugal.[5]

Amphibians
Amphibians reported from the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Celtedens Indeterminate Porto Pinheiro

Ornithischians

Indeterminate euornithopod remains located in Lisbon District.[4] Indeterminate stegosaurid remains present in Lisbon District.[4]

Ornithischians of the Alcobaça Formation
Genus Species District Stratigraphic position Abundance Notes Images

Dacentrurus[4]

D. armatus[4]

Lisboa[4]
Dacentrurus

Ornithopoda[4]

Indeterminate[4]

Lisboa[4]

Trimucrodon[4]

T. cuneatus[4]

Lisboa[4]

Later determined to be indeterminate ornithischian remains.[4]

Saurischians

Indeterminate sauropod remains located in Leiria and Lisboa.[6]

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.
Saurischians reported from the Alcobaça Formation
Genus Species District Stratigraphic position Abundance Notes Images

Allosaurus[5]

Indeterminate[5]

Leiria[5]
Allosaurus
Dinheirosaurus
Ceratosaurus
Lusotitan

Lusotitan[4]

L. atalaiensis[4]

Lisboa[4]

Ceratosaurus[4]

Indeterminate[4]

Lisboa[4]

Dinheirosaurus[4]

D. lourinhanensis[4]

Lisboa[4]

"[Two] cervicals, [nine] dorsals, ribs, limb elements."[7]

Lourinhasaurus[4]

L. alenquerensis[4]

Lisboa[4]

Megalosaurus[4]

M. insignis[4]

Lisboa[4]

Later determined to be indeterminate theropod remains.[4]

Turtles
Turtles reported from the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Peltochelys P. duchastelli Guimarota
Platychelys Indeterminate Guimarota
Pleurosternidae Indeterminate Guimarota

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

Crocodyliformes
Crocodyliformes reported from the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Goniopholis G. baryglyphaeus Guimarota
Goniopholis
Knoetschkesuchus
Machimosaurus
Knoetschkesuchus K. guimarotae Guimarota
Lisboasaurus L. mitracostatus Guimarota
Machimosaurus M. hugii Guimarota

Mammals
Mammals reported from the Alcobaça Formation
Genus Species Location Stratigraphic position Material Notes Images
Bathmochoffatia B. hapax Guimarota
Bernardodon B. sp, B. atlanticus Porto Pinheiro
Drescheratherium D. acutum Guimarota
Dryolestes D. leirensis Guimarota
Ecprepaulax E. anomala Porto Pinheiro
Guimarotodon G. leiriensis Guimarota
Guimarotodus G. inflatus Guimarota Dryolestidae
Haldanodon H. exspectatus Guimarota
Henkelodon H. naias, H. sp Guimarota
Henkelotherium H. guimarotae Guimarota
Iberodon I. quadrituberculatus Porto Pinheiro
Kielanodon K. hopsoni Guimarota
Krebsotherium K. lusitanicum Guimarota
Kuehneodon K. guimarotensis, K. dietrichi, K. simpsoni, K. uniradiculatus, K. sp Guimarota
Laolestes L. andresi Porto Pinheiro
Meketibolodon M. robustus Guimarota
Meketichoffatia M. krausei, M. sp Guimarota
Nanolestes N. krusati Porto Pinheiro
N. drescherae Guimarota
Paulchoffatia P. delgadoi Guimarota
Pinheirodon P. sp, P. vastus, P. pygmaeus Porto Pinheiro
Plesiochoffatia P. thoas, P. peperethos Guimarota
Portopinheirodon P. asymmetricus Porto Pinheiro Dryolestidae
Priacodon Indeterminate Porto Pinheiro
Proalbionbaatar P. plagiocyrtus Guimarota
Pseudobolodon P. dryas, P krebsi, P. oreas Guimarota
Renatodon R. amalthea Guimarota Paulchoffatiidae
? Tinodon Indeterminate Porto Pinheiro
Xenachoffatia X. oinopion Guimarota
Paulchoffatiidae Indeterminate Guimarota 4 distinct genera with 7 species
Pinheirodontidae Indeterminate Porto Pinheiro

See also
  • List of dinosaur-bearing rock formations

Footnotes
  1. Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Jurassic, Europe)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 545–549. ISBN 0-520-24209-2.
  2. "Guimarota". Paleobiology Database. Retrieved 31 August 2018.
  3. "Porto Pinheiro, Lourinha". Paleobiology Database. Retrieved 31 August 2018.
  4. "16.4 Distrito do Lisboa, Portugal; 1. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  5. "16.1 Distrito do Leiria, Portugal; 3. Camadas de Alcobaça," in Weishampel, et al. (2004). Page 548.
  6. "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.
  7. "Table 13.1," in Weishampel, et al. (2004). Page 265.

References
  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. ISBN 0-520-24209-2.


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