Where: Maranhão, Brazil (2.5° S, 44.5° W: paleocoordinates 9.4° S, 19.3° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Alcântara Formation (Itapecuru Group), Cenomanian (100.5 - 93.9 Ma)
• São Luís-Grajaú Basin; some reworking possible; Albian-Cenomanian age is based upon palynology
• group of beds-level stratigraphic resolution
Environment/lithology: estuary or bay; fine-grained, quartzose sandstone and conglomerate
Size classes: macrofossils, mesofossils
Collected by M. A. Medeiros in 1994–present
Collection methods: surface (float), surface (in situ), mechanical,
Primary reference: M. A. Medeiros and I. Villas Bôas. 1999. Occorência de uma paleocomunidade continental do Cenomaniano (Cretáceo Superior) do nordeste do Brasil [Occurence of a continental paleocommunity from the Cenomanian (Upper Cretaceous) of northeastern Brazil]. XV Jornadas Argentinas de Paleontología de Vertebrados, Resúmenes. Ameghiniana 36(4 (suppl.)):15R [M. Carrano/M. Carrano/M. Carrano]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 56365: authorized by Matthew Carrano, entered by Matthew Carrano on 17.11.2005, edited by Mark Uhen, Roger Benson, Jonathan Tennant, Richard Butler and Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
Osteichthyes | |
"Protopterus humei" = Ceratodus humei13
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Coelacanthimorpha | |
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Reptilia | |
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Theropoda indet.13 Marsh 1881 theropod teeth; UFMA 1.20.186, 239, 498, 500, 503, 525, 528, 533, 548, 553
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Noasauridae indet.10 Bonaparte and Powell 1980 ceratosaur UFMA 1.20.554 (a-i): nine isolated 'Masiakasaurus-like' teeth
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Spinosauridae indet.12, Spinosauridae indet.4, "Oxalaia quilombensis n. gen. n. sp." = Spinosaurus aegyptiacus7, Sigilmassasaurus sp.14
"Oxalaia quilombensis n. gen. n. sp." = Spinosaurus aegyptiacus7 Stromer 1915 tetanuran theropod tooth morphotype 1
Sigilmassasaurus sp.14 Russell 1996 tetanuran theropod distal caudal centra, UFMA 1.10.240, 1.10.229
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Carcharodontosauridae indet.3 Stromer 1931 allosauroid teeth, incl. UFRJ 22 Rd, 23 Rd; UFMA 1.10.049, 246, 1.20.029
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Titanosauriformes indet.11 Salgado et al. 1997 sauropod mid-distal caudal, UFMA 1.10.246; caudal centrum, UFMA 1.10.049
Titanosauria indet.16 Bonaparte and Coria 1993 sauropod dorsal centrum, UFMA 1.10.176; anterior-mid caudal centrum, UFMA 1.10.174
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cf. Limaysaurus tessonei16 Calvo and Salgado 1995 Limay lizard UFMA 1.10.168, 188, 806, 015, 283, 170, 306, 728, 983, 1040, 1530, 169, 1802, 951, 990, 1252, 198
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Anhangueridae indet.6 pterosaur UFMA 1.20.178-1, UFMA 1.20.166, UFMA 1.20.130, UFMA 1.20.1744, URC R.77-1, URC R.77-2, URC R.77-3, URC R.77-4, URC R.77-5, teeth (four morphotypes)
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Actinopteri | |
Lepidotes sp. Agassiz 1832 gar | |
Pycnodontiformes indet.13 Berg 1937 | |
Atlanticopristis equatorialis n. gen. n. sp.15
Atlanticopristis equatorialis n. gen. n. sp.15 Pereira and Medeiros 2008 | |
Eotrigonodon sp.13 Weiler 1929
Stephanodus sp.13 Zittel 1883 | |
Chondrichthyes | |
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Polypodiopsida | |
Equisetales indet.14 Dumortier 1829 | |
Osmundaceae indet.14 Berchtold and Presl | |
Paradoxopteris | |
Bartschichthys | |
Bartschichthys sp.13 Gayet and Meunier 1996 |