Bortolin site (lower) (Triassic to of Brazil)

Also known as Antonini Bortolin site

Where: Rio Grande do Sul, Brazil (29.6° S, 53.4° W: paleocoordinates 48.1° S, 15.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Alemoa Member (Santa Maria Formation), Ladinian to Ladinian (242.0 - 228.0 Ma)

• "the base of the Pinheiros-Chiniquá Sequence (Horn et al., 2014) of the Santa Maria Supersequence (Zerfass et al., 2003), formerly known as the Alemoa Member, Santa Maria Formation"

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; massive, red mudstone and fine-grained sandstone

• "The whole sedimentary package was deposited in a fluvial environment, in which the red mudstones represent deposition in the floodplains, whereas small layers of fine-grained sandstones are interpreted to be related to the distal facies of crevasse deposits. The distal floodplains have a great concentration of sandstones, whereas in the proximal floodplains the sandstones are quite rare."
• "massive red mudstones with a minimum thickness of 8 m, divided into two walls with a length of about 20 m each, which form the north and east slopes of the artificial dam. It contains small layers of inter-fingered fine-grained sandstones, showing plane-parallel lamination and cross stratification, strongly cemented by calcium carbonate. Carbonate nodules and punctual mottling are common in the mudstones, especially at the base of the outcrop, whereas tubular or irregular carbonate concretions and mottling of significant lateral continuity are present in the sandstones."

Size class: macrofossils

Collected in 2008

Collection methods: surface (in situ),

Primary reference: A. E. B. Pavanatto, A. T. S. Da-Rosa, R. Temp-Müller, L. Roberto-da-Silva, A. M. Ribeiro, A. G. Martinelli, and S. Dias-da-Silva. 2020. Bortolin site, a new fossiliferous locality in the Triassic (Ladinian/Carnian) of southern Brazil. Revista Brasileira de Paleontologia 23(2):123-137 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 214440: authorized by Matthew Carrano, entered by Matthew Carrano on 30.09.2020, edited by Emma Dunne

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Vertebrata -
Vertebrata indet.
Vertebrata indet. vertebrate
UFSM 11484, ovoid coprolite; UFSM 11485, cylindrical coprolite
Coelacanthimorpha
 Coelacanthiformes - Mawsoniidae
Mawsoniidae indet.
Mawsoniidae indet. Schultze 1993 coelacanth
MCN-PV 10346, fragment of otoccipital region
Reptilia
 Pseudosuchia -
Rauisuchia indet., cf. Decuriasuchus quartacolonia
Rauisuchia indet. Huene 1942 archosaur
UFSM 11488, L jugal; UFSM 11530a, b, c, humerus (a) & 2 isolated vertebrae (b, c).
cf. Decuriasuchus quartacolonia Franca et al. 2011 archosaur
MCN-PV 10317, partial skull roof
Osteichthyes
 Dicynodontia -
Dicynodontia indet.
Dicynodontia indet. dicynodont
UFSM 11482, distal fragment of tusk; UFSM 11483, isolated tusk; UFSM 11530d, neural spine; MCN-PV 10252, R humerus
 Dicynodontia - Stahleckeriidae
Dinodontosaurus sp.
Dinodontosaurus sp. Romer 1943 dicynodont
MCN-PV 10247, skull & associated R humerus; ULBRA PVT 013-001, complete skull
 Therapsida - Traversodontidae
Paratraversodon franciscaensis n. gen. n. sp., Luangwa sudamericana
Paratraversodon franciscaensis n. gen. n. sp. Kerber et al. 2024 cynodont
Holotype: ULBRA PVT-049, skull (cranium and lower jaw)
Luangwa sudamericana Abdala and Sa-Teixeira 2004 cynodont
MCN-PV 10314, disarticulated cranial bones, several postcanines & postcranial elements
 Therapsida - Chiniquodontidae
Chiniquodon sp.
Chiniquodon sp. Huene 1936 cynodont
MCN-PV 10315, incomplete lower jaw