Feliz Deserto Formation

Feliz Deserto Formation
Stratigraphic range: Berriasian-Valanginian ~145–132  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Location
Region	Sergipe-Alagoas Basin of Northeastern Brazil
Country	Brazil
Type section
Named for	Feliz Deserto

The Feliz Deserto Formation is a geologic formation of the Early Cretaceous age (Berriasian to Valanginian) in northeastern Brazil's Sergipe-Alagoas Basin. The formation belongs to the rift phase, in which a great lake formed. ^[1]

Background

The formation provides vertebrate fossils of Lepidotes fish and teeth of crocodylomorphs and theropods, including what may be the oldest members of the Spinosauridae reported in South America. ^{[1] [2]}

Fossil content

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.

Dinosaurs

Theropods

Theropods of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Baryonychinae indet. [1]	Indeterminate			A tooth	A spinosaurid theropod
Spinosaurinae indet. [3]	Indeterminate			Eight teeth	A spinosaurid theropod
Theropoda indet. [3]	Indeterminate			A toe bone

Crocodylomorphs

Crocodylomorphs of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Crocodyliformes indet. [3]	Indeterminate			Six isolated teeth
Mesoeucrocodylia indet. [3]	Indeterminate			An isolated osteoderm
Neosuchia Indet. [3]	Indeterminate			Eleven isolated teeth

Fish

Fishes of the Feliz Deserto Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Lepidotes [3]	L. sp.				A lepidotid fish

References

1. ARAGÃO, PAULO (2021). "DENTES FÓSSEIS DE ARCOSSAUROS DA FORMAÇÃO FELIZ DESERTO (CRETÁCEO INFERIOR), BACIA DE SERGIPE-ALAGOAS". Departamento de Biologia, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Sergipe.
2. Sales, Marcos A. F.; Liparini, Alexandre; De Andrade, Marco (2017). "The oldest South American occurrence of Spinosauridae (Dinosauria, Theropoda)" . Journal of South American Earth Sciences . 74: 83–88. Bibcode:2017JSAES..74...83S. doi:10.1016/j.jsames.2016.10.005 – via Elsevier Science Direct.
3. Lacerda, M.B.S.; de Andrade, M.B.; Sales, M.A.F.; Aragão, P.R.L.; Vieira, F.S.; Bittencourt, J.S.; Liparini, A. (2023). "The vertebrate fossil record from the Feliz Deserto Formation (Lower Cretaceous), Sergipe, NE Brazil: paleoecological, taphonomic, and paleobiogeographic implications". Cretaceous Research. 147 105463. Bibcode:2023CrRes.14705463L. doi:10.1016/j.cretres.2022.105463. ISSN   0195-6671. S2CID   255635144.