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First period of the Mesozoic Era
The Triassic (/traɪˈæsɪk/ try-A-sik) is a geologic period and a stratigraphic system that spans 50.5 million years from the end of the Permian Period 251
Triassic
Earth's most severe extinction event
O–S The Permian–Triassic extinction event was an extinction event that occurred around the boundary between the Permian and Triassic geologic periods
Permian–Triassic extinction event
Permian–Triassic_extinction_event
Mass extinction ending the Triassic period
Cap Late D O–S The Triassic–Jurassic (Tr-J) extinction event, often called the Triassic–Jurassic mass extinction (TJME) or end-Triassic extinction, marks
Triassic–Jurassic_extinction
First of three epochs of the Triassic Period
The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between 251.902 Ma and 247 Ma (million
Early_Triassic
Third and final epoch of the Triassic Period
The Late Triassic is the third and final epoch of the Triassic Period in the geologic time scale, spanning the time between 237 Ma and 201.4 Ma (million
Late_Triassic
Second epoch of the Triassic period
timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided
Middle_Triassic
Musical comedy
Triassic Parq is a musical comedy with music by Marshall Pailet, and lyrics and book by Marshall Pailet, Bryce Norbitz and Steve Wargo. The novel and film
Triassic_Parq
Television Film
Triassic Attack is a 2010 television film directed by Colin Ferguson and produced by UFO International Productions. It premiered November 27, 2010, on
Triassic_Attack
Second period of the Mesozoic Era
system that lasted about 58.3 million years, spanning from the end of the Triassic Period 201.4 Ma (million years ago) to the beginning of the Cretaceous
Jurassic
Sixth and last period of the Paleozoic Era
to the beginning of the Triassic Period 251.902 Ma. It is the sixth and last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic
Permian
Diverse clade of specialized reptiles
era, first appearing early in the Triassic period. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya
Dinosaur
Second era of the Phanerozoic Eon
history, lasting from about 252 to 66 million years ago (Ma), comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance
Mesozoic
Genus of theropod dinosaurs from the late Triassic
that lived approximately 215 to 201.4 million years ago during the late Triassic period from the middle Norian to Rhaetian age in what is now the southwestern
Coelophysis
Fourth and current eon of the geological timescale
Jurassic Period. It has three major epochs: Early Triassic, Middle Triassic, and Late Triassic. The Early Triassic lasted between 252 million to 247 million years
Phanerozoic
Genus of Late Permian and Early Triassic dicynodont therapsids
genus of herbivorous dicynodont therapsids from the late Permian and Early Triassic epochs (around 248 million years ago). It had a widespread distribution
Lystrosaurus
Fossil sites from the Triassic period
The list of Triassic Lagerstätten is a documentation of Lagerstätte fossils sites around the world, dated to the Triassic period. These are characterized
List_of_Triassic_lagerstätten
Clade of therapsids
(approximately 260 mya), and extensively diversified after the Permian–Triassic extinction event. Mammals are cynodonts, as are their extinct ancestors
Cynodontia
(2026) study fungal decay structures in Agathoxylon wood from the Upper Triassic (Norian) strata of the Löwenstein Formation (Germany), and interpret the
2026_in_paleontology
Neoproterozoic to Cretaceous landmass
Gondwana began to separate from northern Pangea (Laurasia) during the Triassic, and started to fragment during the Early Jurassic (around 180 Ma). The
Gondwana
Genus of sauropodomorph dinosaurs
an extinct genus of unaysaurid sauropodomorph dinosaurs from the Upper Triassic (Norian) Pebbly Arkose Formation of Zimbabwe. The genus contains a single
Musango
Subdivisions of geological time
the Triassic Period (252 - 201 Ma), though Lucas later designated LVFs for other periods as well. Eight worldwide LVFs are defined for the Triassic. The
Triassic land vertebrate faunachrons
Triassic_land_vertebrate_faunachrons
Clade of tetrapods
the Early Triassic. Synapsid population and diversity were severely reduced by the Capitanian mass extinction event and the Permian–Triassic extinction
Synapsida
Group of diapsids broadly classified as reptiles
relatives. The oldest true archosaur fossils are known from the Early Triassic period, though the first archosauriforms and archosauromorphs (reptilians
Archosaur
Rapid decrease in Earth's biodiversity
End Permian extinction, or the "Great Dying", occurred at the Permian–Triassic transition. It was the Phanerozoic Eon's largest extinction: 53% of marine
Extinction_event
National park in Arizona, United States
known for its fossils, especially fallen trees that lived in the Late Triassic Epoch, about 225 million years ago. The sediments containing the fossil
Petrified Forest National Park
Petrified_Forest_National_Park
Largest known delta plain in Earth's geological history
The Triassic Boreal Ocean (TBO) Delta Plain was a fluvial delta plain formation located in Northern Pangaea during the Triassic period (Carnian) from
Triassic Boreal Ocean Delta Plain
Triassic_Boreal_Ocean_Delta_Plain
Large region of volcanic rock in Russia
eruptions continued for roughly two million years and spanned the Permian–Triassic boundary, or P–T boundary, which occurred around 251.9 million years ago
Siberian_Traps
Clade of tetrapods including mammals
Guadalupian (Middle Permian) through to the Early Triassic. In the aftermath of the Permian–Triassic extinction event, therapsids declined in relative
Therapsida
Extinct order of tetrapods
amphibians—that flourished worldwide during the Carboniferous, Permian and Triassic periods, with fossils being found on every continent. A few species continued
Temnospondyli
faunas from southern China during the Triassic. Evidence from the study of coprolites from the Lower Triassic Nanlinghu Formation (China), indicative
2026_in_reptile_paleontology
Extinct genus of amphibians
("wicker chest") is an extinct genus of temnospondyl amphibian known from the Triassic period. The type species, Gerrothorax pulcherrimus, is known from Greenland
Gerrothorax
Extinct genus of dinosaurs
after the Japanese giant movie monster Godzilla. It lived in the Late Triassic Period, containing a single known species, Gojirasaurus quayi. Gojirasaurus
Gojirasaurus
Extinct genus of fishes
Birgeria is a genus of carnivorous marine ray-finned fish from the Triassic period. Birgeria had a global distribution, with fossil known from Madagascar
Birgeria
Desojo (2026). Terras et al. (2026) compare the cranial morphology of Triassic pseudosuchians and other reptiles (including dinosaurs), and argue that
2026 in archosaur paleontology
2026_in_archosaur_paleontology
Founding Father, U.S. president from 1801 to 1809
Society. 49 (3): 433–440. JSTOR 25082844. Sues, H.-D.; Olsen, P. E. (1990). "Triassic Vertebrates of Gondwanan Aspect from the Richmond Basin of Virginia". Science
Thomas_Jefferson
Extinct genus of lycopsid plants in the Order Isoetales
dominated vegetation during the Early Triassic across Eurasia and elsewhere, in the aftermath of the Permian–Triassic extinction event. During this period
Pleuromeia
Major feature of the supercontinent
portion of the supercontinent Pangaea during the Carboniferous, Permian and Triassic periods. They were formed as a result of collision between the large landmasses
Central_Pangean_Mountains
Extinct genus of reptiles
sauros, 'lizard') is an extinct genus of sauropterygian reptile from the Triassic period, approximately 245–228 million years ago, with fossils being distributed
Nothosaurus
Clade of reptiles
in the Triassic Period. Dinosauromorpha was originally defined to include dinosauriforms and lagerpetids (a family of small long-legged Triassic reptiles)
Dinosauromorpha
Major climatic change and biotic turnover during the Triassic
the latter part of the Carnian Stage, the first subdivision of the Late Triassic Epoch, and lasted for perhaps 1–2 million years (around 234–232 million
Carnian_pluvial_episode
2026 American documentary series
series focuses on the history of dinosaurs from their appearance in the Triassic period until the demise of non-avian dinosaurs in the Cretaceous–Paleogene
The_Dinosaurs_(miniseries)
Genus of basal avemetatarsalians
armour") is an extinct genus of basal avemetatarsalian from the Middle/Upper Triassic Makay Formation (Isalo II beds) of Madagascar. The genus contains a single
Mambachiton
Prehistoric ocean between Gondwana and Laurasia
which lasted between the Cambrian and the Early Triassic, while the Neotethys formed during the Late Triassic and lasted in some form up to the Oligocene–Miocene
Tethys_Ocean
the Triassic-Jurassic transition in Europe interpreted as indicative of spread of fern-dominated savannas after forest collapse during the Triassic–Jurassic
2026_in_paleobotany
Clade of bird-like archosaur reptiles
avemetatarsalians to survive past the end of the Triassic, other groups flourished during the Triassic. The most basal (earliest-branching) and plesiomorphic
Avemetatarsalia
Extinct order of large marine reptiles
about 94 million years ago, into the Late Cretaceous. During the Early Triassic epoch, ichthyosaurs and other ichthyosauromorphs evolved from a group of
Ichthyosauria
Age in the Early Triassic epoch
the Olenekian is an age in the Early Triassic epoch; in chronostratigraphy, it is a stage in the Lower Triassic series. It spans the time between 250
Olenekian
Extinct genus of ichthyosaur reptile
from the Late Triassic. Specimens have been found in the United States, Canada, and China. Shastasaurus lived during the late Triassic period. The type
Shastasaurus
Extinct genus of reptiles
among the oldest representatives, that lived from the Lower to Middle Triassic in what are now North America and Europe. The first known fossils of this
Cymbospondylus
Genus of giant ichthyosaurs
IK-thee-ə-TY-tən) is an extinct genus of giant ichthyosaur from the Late Triassic (Rhaetian), known from the Westbury Mudstone Formation in Somerset, England
Ichthyotitan
Supercontinent from the late Paleozoic to early Mesozoic eras
faulting during the Triassic, also accompanied by a substantial reduction of the Central Pangean Mountains by the Middle Triassic. The Cimmerian terranes
Pangaea
First age of the Late Triassic epoch
commonly, Karnian) is the lowermost stage of the Upper Triassic Series (or earliest age of the Late Triassic Epoch). It lasted from 237 to 227.3 million years
Carnian
Extinct family of dinosaur-like reptiles
Silesauridae is an extinct family of early dinosauriforms which lived during the Triassic Period. Their fossils have been found in Europe, North America, South America
Silesauridae
Extinct order of heavily armoured reptiles
and non-avian dinosaurs. All known aetosaurs are restricted to the Late Triassic, and in some strata from this time they are among the most abundant fossil
Aetosauria
al. (2026) report the discovery of calcified cartilage from the Upper Triassic Chinle and Tecovas formations (Arizona and Texas, United States), interpreted
2026_in_paleoichthyology
Extinct genus of bivalves
Capitanian stage of the Middle Permian to the Anisian stage of the Middle Triassic, 266-237 million years ago. Fossils have been found worldwide in North
Claraia
Extinct family of basal saurischian dinosaurs
record around 233.23 million years ago (the Carnian stage of the Late Triassic), before becoming extinct by the end of the Carnian stage. Herrerasaurids
Herrerasauria
Mountain in Switzerland and Italy
fossil content, one of the best known records of marine life in the Middle Triassic period. The Italian region west of Poncione d'Arzo (Porto Ceresio) was
Monte_San_Giorgio
Extinct order of reptiles
(Early Triassic) and early Anisian (early Middle Triassic) of Japan, China, Canada, and Spitsbergen (Norway). By the later part of the Middle Triassic, the
Ichthyopterygia
Extinct order of cartilaginous fishes
chondrichthyans (cartilaginous fish) known from the Carboniferous to the Late Triassic. They were native to freshwater, marginal marine, and shallow marine habitats
Xenacanthiformes
British palaeontologist
Bristol. His published work has mostly concentrated on the evolution of Triassic reptiles but he has also worked on extinction events and faunal changes
Michael_Benton
Class of ray-finned bony fishes
modern teleosts are from the Triassic period (Prohalecites, Pholidophorus), and the molecular clock also supports a Triassic age for the teleost crown group
Actinopterygii
Extinct genus of fishes
extinct genus of prehistoric marine ray-finned fish from the Middle to Late Triassic of Europe. It is the oldest known member of the family Macrosemiidae. Three
Legnonotus
First age of the Early Triassic epoch
Induan is the first age of the Early Triassic epoch in the geologic timescale, or the lowest stage of the Lower Triassic series in chronostratigraphy. It
Induan
Capital city of New South Wales, Australia
to the suburbs of Alexandria and Rosebery. Sydney is made up of mostly Triassic rock with some recent igneous dykes and volcanic necks (typically found
Sydney
Extinct genus of dicynodonts
and Argentina) and Southern Africa (Tanzania) from the Middle Triassic to the Upper Triassic. It was medium to large sized dicynodont with a skull up to
Dinodontosaurus
Major landmass in the geological past
of Pangea. The first was a passive rifting event that occurred in the Triassic period. The rifting event caused the Atlantic Ocean to form. The other
Paleocontinent
group of gymnosperms in the Triassic period (245–202 million years ago). Fossil angiosperm-like pollen from the Middle Triassic (247.2–242.0 Ma) suggests
Fossil history of flowering plants
Fossil_history_of_flowering_plants
Sedimentary deposit with well-preserved extraordinary fossils
Hunsrück Slates, and Gogo Formation, the Carboniferous Mazon Creek, the Triassic Madygen Formation, the Jurassic Posidonia Shale and Solnhofen Limestone
Lagerstätte
Last known individual of a species or subspecies
Extinction events Major Ordovician–Silurian Late Devonian Permian–Triassic Triassic–Jurassic Cretaceous–Paleogene Holocene Timeline Other Great Oxidation
Endling
during the Triassic period, between 243 and 233.23 million years ago. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction
List_of_dinosaur_genera
Lake in Quebec, Canada
Babel. The structure was created 214±1 million years ago, in the Late Triassic, by the impact of a meteorite 5 km (3 mi) in diameter. The lake and island
Manicouagan_Reservoir
Clade of therapsids
which diversified again during the Triassic, before the majority of them disappeared before or during the Triassic–Jurassic extinction, except for a lineage
Eutheriodontia
Family of basal chelicerates
"living fossils", having changed little since they first appeared in the Triassic around 250 million years ago, and similar-looking fossil xiphosurans extend
Horseshoe_crab
Extinct order of reptiles
Rhynchosaurs are a group of extinct herbivorous Triassic archosauromorph reptiles, belonging to the order Rhynchosauria. Rhynchosaurs are distinguished
Rhynchosauria
Age in the Middle Triassic
The Ladinian is a stage and age in the Middle Triassic series or epoch. It spans the time between 241.464 Ma and ~237 Ma (million years ago). The Ladinian
Ladinian
Genus of reptiles
of rauisuchid that lived in what is now North America during the Late Triassic. The genus comprises two species, P. kirkpatricki and P. alisonae, and
Postosuchus
Extinct genus of dinosaurs
Herrerasaurus is likely a genus of saurischian dinosaur from the Late Triassic period. Measuring 6 m (20 ft) long and weighing around 350 kg (770 lb),
Herrerasaurus
North Carolina, United States), expanding known geographical range of Late Triassic poposauroids. McDavid (2025) and Pêgas, Bandeira & Silva (2025) discuss
2025 in archosaur paleontology
2025_in_archosaur_paleontology
Informal group of Triassic archosaurs with pillar-erect posture
"Rauisuchia" is a paraphyletic group of mostly large and carnivorous Triassic archosaurs. Rauisuchians are a category of archosaurs within a larger group
Rauisuchia
Extinct genus of reptiles
is an extinct genus of archosauromorph reptile which lived during the Triassic Period in Europe, Asia, and North America. It is recognizable by its extremely
Tanystropheus
Global climate phenomenon
had a strong influence on Earth's hothouse climate during the Permian-Triassic extinction event. The increasing intensity and duration of El Niño events
El_Niño–Southern_Oscillation
Clade of cynodonts
herbivorous diets. The earliest and most basal probainognathian is the Middle Triassic (Anisian) aged Lumkuia, from South Africa, though probainognathians would
Probainognathia
Extinct family of reptiles
in Africa, Asia, Europe and North America during the Early Triassic to the Middle Triassic period (latest Olenekian to Anisian stages). All species had
Ctenosauriscidae
Extinct genus of dicynodonts
of dicynodonts that lived during the Carnian and Norian stages of the Triassic period (230–215 million years ago). Placerias belongs to a clade of dicynodonts
Placerias
Extinct genus of reptiles
Aetosauria. It lived in North America and potentially India during the Late Triassic. Desmatosuchus was a large quadrupedal reptile measuring 4.5 m (15 ft)
Desmatosuchus
the southwestern United States, preserving a very diverse fauna of Late Triassic (primarily Norian-age) animals and plants. This is a list of fossilized
Paleobiota of the Chinle Formation
Paleobiota_of_the_Chinle_Formation
Capital and largest city of Hungary
cave (total length 2,200 m or 7,200 ft). The hills were formed in the Triassic Period. The highest point of the hills and of Budapest is János Hill, at
Budapest
Genus of Late Cretaceous theropod
around healing human cranial trepanations and healing fractures in the Triassic reptile Stagonolepis, in the absence of infection. The possible cause may
Tyrannosaurus
Geological formation in China
The Guanling Formation is a Middle Triassic (Anisian or Pelsonian in the regional chronostratigraphy) geologic formation in southwestern China. The formation
Guanling_Formation
Geologic formation in France
preserves fossils dating back to the Triassic period, more specifically the Anisian stage of the Middle Triassic epoch. It represents a lagerstatte that
Grès_à_Voltzia
Geological formation in China
The Guiyang biota is an exceptionally preserved Early Triassic (approximately 250.8 million years ago) fossil assemblage from the Daye Formation near Guiyang
Guiyang_biota
Stage of the Triassic
timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from 247 million years ago until 241.464 million
Anisian
Cb3869, BRSMG Cb3870, BRSMG Cb4063 and BRSUG 7007) discovered from the Late Triassic (Rhaetian) Westbury Formation at the Aust Cliff. "Aust Colossus" has been
List of informally named fossil reptiles
List_of_informally_named_fossil_reptiles
Extinct genus of reptiles
teeth) is an extinct genus of marine reptile from the Early Triassic to Middle Triassic. It is a member of the ichthyosauriform family Omphalosauridae
Omphalosaurus
Development of insects from an ancestral crustacean and their subsequent radiation
the Middle Triassic, becoming widespread during the Middle and Late Triassic . A single large wing from a species of Diptera in the Triassic (10 mm instead
Evolution_of_insects
Mass extinction event c. 444 million years ago
nearly 85% of marine species. Under most tabulations, only the Permian–Triassic mass extinction exceeds the Late Ordovician mass extinction in biodiversity
Late Ordovician mass extinction
Late_Ordovician_mass_extinction
List of extinct species
Extinction events Major Ordovician–Silurian Late Devonian Permian–Triassic Triassic–Jurassic Cretaceous–Paleogene Holocene Timeline Other Great Oxidation
Lists_of_extinct_species
1 (1.9%) Devonian: 9 (17.3%) Carboniferous: 2 (3.8%) Permian: 3 (5.8%) Triassic: 8 (15.4%) Jurassic: 5 (9.6%) Cretaceous: 15 (28.8%) Total: 52 Schopf,
List of fossiliferous stratigraphic units in Australia
List_of_fossiliferous_stratigraphic_units_in_Australia
Extinct genus of temnospondyls
lizard") is an extinct genus of temnospondyl amphibian from the Middle Triassic of Europe. It remains one of the largest amphibians known in the fossil
Mastodonsaurus
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