Alcobaça FormationThe Alcobaça Formation, previously known as the Guimarota Formation and also known as the Consolação Unit, is a geological formation in Portugal. It dates back to the Kimmeridgian stage of the Late Jurassic. It is an important source of information on the diversity of Late Jurassic mammals. Many of the fossils were collected from the now disused and flooded Camadas de Guimarota coal mine.
Morrison FormationThe Morrison Formation is a distinctive sequence of Upper Jurassicsedimentary rock found in the western United States which has been the most fertile source of dinosaurfossils in North America. It is composed of mudstone, sandstone, siltstone, and limestone and is light gray, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period.
Late JurassicThe Late Jurassic is the third epoch of the Jurassic period, and it spans the geologic time from 161.5 ± 1.0 to 143.1 ± 0.6 million years ago (Ma), which is preserved in Upper Jurassic strata. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age.
AploconodonAploconodon is an extinct genus of Late Jurassic mammals belonging to the family Amphidontidae. It contains one species, A. comoensis. It is present in stratigraphic zone 5 of the Morrison Formation. See alsoList of prehistoric mammalsPaleobiota of the Morrison FormationReferencesFoster, J. (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press.
TriconolestesTriconolestes is an extinct genus of Late Jurassiceutriconodont mammal from the Morrison Formation, present in stratigraphic zones 4. Known from only a single molar, it is a small mammal typically considered an amphilestid. However, it has also been compared to Argentoconodon, which has been considered a volaticothere related to gliding mammals such as Volaticotherium and Ichthyoconodon.
LaolestesLaolestes is an extinctgenus of dryolestid mammal. Fossil remains are known from the Morrison Formation, in stratigraphic zones 5 and 6., the Late Jurassic of Portugal, and Early CretaceousWadhurst Clay of the United Kingdom.AmphidonAmphidon is an extinct genus of Late Jurassic mammal from the Morrison Formation. It is present in stratigraphic zone five. Two species have been named in the genus: Amphidon superstes and Amphidon aequicrurius, by Simpson in 1925.AmblotheriumAmblotherium is an extinct genus of Late Jurassic and Early Cretaceous mammal. The type species Amblotherium pusillum is from the Lulworth Formation of southern England, while the referred species Amblotherium gracilis is from stratigraphic zones 2, 3 and 5 of the Morrison Formation of the US.EuthlastusEuthlastus is an extinct genus of Late Jurassic (Kimmeridgian - Tithonian) mammal from the Morrison Formation. Present in stratigraphic zones 5 and 6. It is represented by only five upper molars.ComodonComodon is an extinct genus of Late Jurassic mammal from the Morrison Formation of Wyoming. Fossils of this taxon are present in stratigraphic zone 5.TathiodonTathiodon is an extinct genus of Late Jurassic (Kimmeridgian - Tithonian) mammal from the Morrison Formation. Present in stratigraphic zone 5.
PaurodonPaurodon is an extinct genus of Late Jurassic mammal from the Morrison Formation of the Western United States.
Morrison FormationThe Morrison Formation is a distinctive sequence of Upper Jurassicsedimentary rock found in the western United States which has been the most fertile source of dinosaurfossils in North America. It is composed of mudstone, sandstone, siltstone, and limestone and is light gray, greenish gray, or red. Most of the fossils occur in the green siltstone beds and lower sandstones, relics of the rivers and floodplains of the Jurassic period.Late JurassicThe Late Jurassic is the third epoch of the Jurassic period, and it spans the geologic time from 161.5 ± 1.0 to 143.1 ± 0.6 million years ago (Ma), which is preserved in Upper Jurassic strata. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age.AploconodonAploconodon is an extinct genus of Late Jurassic mammals belonging to the family Amphidontidae. It contains one species, A. comoensis. It is present in stratigraphic zone 5 of the Morrison Formation. See alsoList of prehistoric mammalsPaleobiota of the Morrison FormationReferencesFoster, J. (2007). Jurassic West: The Dinosaurs of the Morrison Formation and Their World. Indiana University Press.TriconolestesTriconolestes is an extinct genus of Late Jurassiceutriconodont mammal from the Morrison Formation, present in stratigraphic zones 4. Known from only a single molar, it is a small mammal typically considered an amphilestid. However, it has also been compared to Argentoconodon, which has been considered a volaticothere related to gliding mammals such as Volaticotherium and Ichthyoconodon.LaolestesLaolestes is an extinctgenus of dryolestid mammal. Fossil remains are known from the Morrison Formation, in stratigraphic zones 5 and 6., the Late Jurassic of Portugal, and Early CretaceousWadhurst Clay of the United Kingdom.AmphidonAmphidon is an extinct genus of Late Jurassic mammal from the Morrison Formation. It is present in stratigraphic zone five. Two species have been named in the genus: Amphidon superstes and Amphidon aequicrurius, by Simpson in 1925.AmblotheriumAmblotherium is an extinct genus of Late Jurassic and Early Cretaceous mammal. The type species Amblotherium pusillum is from the Lulworth Formation of southern England, while the referred species Amblotherium gracilis is from stratigraphic zones 2, 3 and 5 of the Morrison Formation of the US.EuthlastusEuthlastus is an extinct genus of Late Jurassic (Kimmeridgian - Tithonian) mammal from the Morrison Formation. Present in stratigraphic zones 5 and 6. It is represented by only five upper molars.ComodonComodon is an extinct genus of Late Jurassic mammal from the Morrison Formation of Wyoming. Fossils of this taxon are present in stratigraphic zone 5.TathiodonTathiodon is an extinct genus of Late Jurassic (Kimmeridgian - Tithonian) mammal from the Morrison Formation. Present in stratigraphic zone 5.PaurodonPaurodon is an extinct genus of Late Jurassic mammal from the Morrison Formation of the Western United States.*As an Amazon Associate I earn from qualifying purchases.