Tremembé Formation

The Tremembé Formation is a major Oligocene geological formation within the Taubaté Basin of Brazil. It is notable for its fossils.

Tremembé Formation
Stratigraphic range: Deseadan
Location
Coordinates	12.9°S 38.5°W / -12.9; -38.5
Approximate paleocoordinates	12.7°S 5.7°W / -12.7; -5.7
Region	São Paulo
Country	Brazil
Extent	Taubaté Basin
Type section
Named for	Tremembé
Tremembé Formation (Brazil)

Location

The Tremembé Formation located within the Taubaté Basin in the state of São Paulo.^[1]

Geology

The formation is characterized by lacustrine deposits^[2] which were laid down during the Oligocene.^[3]

Paleontology

The Tremembé Formation contains many fossils which are of interest to paleontologists.^[1][4] Fish are particularly well preserved.^[5] Among other mammals significant Sparassodonta and Proborhyaenidae finds have been made.^[6]

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.

Amphibians

Amphibians of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Ymboirana	Y. acrux				A thiphlonectid caecilian

Birds

Birds of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Agnopterus	A. sicki				A phoenicopterid phoenicopteriform
Ameripodius	A. silvasantosi				A quercymegapodiid pangalliform
Brasilogyps	B. faustoid				A catharid cathartiform
Chaunoides	C. antiquus				A anhimid anseriform
Hoazinavis	H. lacustris				A opisthocomid opisthocomiform
Palaeodus	P. ambiguus				A phoenicopterid phoenicopteriform
Paraphysornis	P. brasilensis				A physornithine phorusrhacid
Taubacrex	T. granivora				A quercymegapodiid pangalliform
Taubatornis	T. campbelli				A teratornithid cathartiform

Reptiles

Crocodylomorphs

Crocodylomorphs of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Caiman	C. tremembensis				A caimanine alligatorid

Lepidosaurs

Lepidosaurs of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Testudines

Testudines of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Fish

Fishes of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Brycon	B. alvus				A bryconine bryconid
Cyphocharax	C. rosesi				A curimatid toothless characin
Lignobrycon	L. ligniticus				A triportheine triportheid
Megacheinodon	M. unicus				A cheinodontine charanid
Plesiocurimata	P. alvarengai				A curomatid toothless characin
Santosius	S. antiquus				A Perchicthyid centrarchiform
Steindachneridion	S. iherengi				pimelodid siluriform
	S. silvasantosi
Taubateia	T. paraiba				loricariid siluriform
Tremembichthys	T. garciae				A chichlasomatin chichline
	T. pauloensis

Mammals

Meridiolestidans

Meridiolestidans of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Meridiungulates

Meridiungulates of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Astrapotheria Indet.	Indeterminate
Rhynchippus	R. brasiliensis				A notohippid notoungulate
Taubatherium	T. paulacoutoi				A leontiniid notoungulate

Xenarthrans

Xenarthrans of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Eocoelophorus	E. glyptodontoides				An armadillo

Metatherians

Metatherians of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Proborhyaenidae Indet.	Indeterminate

Rodents

Rodents of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Acarechimys	A. minutus				A eumysopine echimyid
Paulacoutomys	P. paulista				A echimyid octodontoid

Primates

Primates of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images

Bats

Bats of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Mormopterus	M. faustoi				An free-tailed bat

Insects

Insect of the Tremembé Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Taubaracne	T. maculosa				An spider