Where: Algarve, Portugal (37.3° N, 8.1° W: paleocoordinates 17.1° N, 0.1° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Grès de Silves Formation, Carnian to Carnian (237.0 - 208.5 Ma)
• "The Penina Bonebed is located in the part of the Gres de Silves Formation termed ‘AB2’ (Fig. 1) and previously considered to be Rhaetian–Hettangian (latest Triassic–earliest Jurassic) in age. The bonebed is most likely older than Jurassic, however, because it is located considerably below Central Atlantic Magmatic Province (CAMP) basalts in local section. The Portuguese CAMP basalts have been radioisotopically dated at 198.1 Ma, which would place the basalts in the earliest Jurassic (Sinemurian). However, these dates need to be corrected for decay constant bias and are likely to be a few million years older. In any event, the Portuguese basalts are likely somewhat younger than many other radioisotopically dated CAMP sections in North America and North Africa. A more precise Triassic age determination of the bonebed is not currently possible, because the stratigraphy and geochronology of the Gres de Silves Formation have only been studied in cursory detail. Our research group is currently revising the geology of the formation, and we recently tentatively proposed, based on vertebrate biostratigraphy, that at least part of the ‘AB2’ unit (i.e., that containing the Penina Bonebed) is likely to be late Carnian–Norian in age" (Brusatte et al. 2014)
• bed-level stratigraphic resolution
Environment/lithology: fluvial-deltaic; lithified, fine-grained, red, argillaceous sandstone
Size class: macrofossils
Collected by Thomas Schröter, Octavio Mateus, Richard Butler, Steve Brusatte, Sebastian Steyer in 1979-1980, 2009-2011
Collection methods: quarrying, mechanical,
• FCT-UNL, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
Primary reference: F. Witzmann and T. Gassner. 2008. Metoposaurid and mastodonsaurid stereospondyls from the Triassic-Jurassic boundary of Portugal. Alcheringa 32:37-51 [R. Butler/R. Butler]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 82902: authorized by Richard Butler, entered by Richard Butler on 04.08.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Osteichthyes | |
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Reptilia | |
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Amphibia | |
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Metoposaurus algarvensis n. sp.1
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