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First period of the Mesozoic Era
The Triassic (/traɪˈæsɪk/; sometimes symbolized as 🝈) is a geologic period and a stratigraphic system that spans 50.5 million years from the end of the
Triassic
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
Earth's most severe extinction event
% Millions of years ago (H) K–Pg Tr–J P–Tr Cap Late D O–S The Permian–Triassic extinction event, colloquially known as the Great Dying, was an extinction
Permian–Triassic extinction event
Permian–Triassic_extinction_event
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
Clade of 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, comprising the Triassic, Jurassic and Cretaceous Periods. It is characterized by the dominance
Mesozoic
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 246.7 Ma (million
Early_Triassic
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
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
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
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
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
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
report a mass occurrence of specimens of Halorella amphitoma in the Upper Triassic strata of the Dachstein Formation (Hungary), interpreted as preserved in
2026_in_paleontology
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
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
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
the anatomy of the ichthyopterygian specimen NSM-PV-20028 from the Lower Triassic Osawa Formation (Japan), assigned to cf. Utatsusaurus hataii, is published
2026_in_reptile_paleontology
Clade of therapsids
(approximately 260 mya), and extensively diversified after the Permian–Triassic extinction event. Mammals are cynodonts, as are their extinct ancestors
Cynodontia
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
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 million
Gondwana
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
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)
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
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
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
Extinct genus of dinosaurs
after the giant monster movie character Godzilla. It lived in the Late Triassic Period, containing a single known species, Gojirasaurus quayi. Gojirasaurus
Gojirasaurus
Supercontinent from the late Paleozoic to early Mesozoic eras
and began to break apart about 200 million years ago, at the end of the Triassic and beginning of the Jurassic. Pangaea was C-shaped, with the bulk of its
Pangaea
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
Geologic formation in Tanzania
Formation (also known as the Manda Beds) is a Middle Triassic (Anisian?) or possibly Late Triassic (Carnian?) geologic formation in Tanzania. It preserves
Manda_Formation
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
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
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
"Exceptional vertebrate biotas from the Triassic of China, and the expansion of marine ecosystems after the Permo-Triassic mass extinction"". Earth-Science Reviews
List_of_lagerstätten
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
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
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
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
Clade of reptiles
Crurotarsi as the term for crocodilian ancestors. In 2011, a major revision of Triassic archosaur relations proposed that Rutiodon's group, Phytosauria, was not
Pseudosuchia
Extinct genus of reptiles
is an extinct genus of archosauriform reptiles from the early to middle Triassic of South Africa. Remains have been found in the Cynognathus Assemblage
Erythrosuchus
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
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
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 249
Olenekian
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
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
Genus of reptiles
and P. alisonae, that lived in what is now North America during the Late Triassic. Postosuchus is a member of the clade Pseudosuchia, the lineage of archosaurs
Postosuchus
Geologic formation in Brazil
found in Rio Grande do Sul, Brazil. It is primarily Carnian in age (Late Triassic), and is notable for its fossils of cynodonts, "rauisuchian" pseudosuchians
Santa_Maria_Formation
Clade of reptiles
Silesauridae or Ornithischia. Saltopus, an enigmatic taxon from the Late Triassic of Scotland, has been placed closer to dinosaurs than Marasuchus, in a
Dinosauromorpha
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
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
Sauropodomorph dinosaur genus from Late Triassic Argentina
extinct genus of sauropodiform dinosaur that lived in the Norian-aged (Upper Triassic) Los Colorados Formation of what is now Argentina. The type species, L
Lessemsaurus
Extinct genus of dicynodonts
Ischigualastia is an extinct genus of large dicynodont therapsids from the Late Triassic (Carnian) Ischigualasto Formation of Argentina (from which the genus takes
Ischigualastia
Extinct genus of dinosaurs
lived approximately 210 million years ago during the latter part of the Triassic Period in what is now Germany. Liliensternus was a bipedal, ground-dwelling
Liliensternus
Extant clade of dinosaurs
that remain. Theropods first appeared during the Carnian age of the Late Triassic period 231.4 million years ago (Ma) and included the majority of large
Theropoda
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 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
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 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
Extinct group of Permo-Triassic therapsids
therapsids (mammals and their close extinct relatives) from the Permian and Triassic periods. The therocephalians ("beast-heads") are named after their large
Therocephalia
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
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
Extinct clade of therapsids
They rebounded at beginning of the following Triassic, but subsequently declined during the Late Triassic and died out towards the end of that period.
Dicynodontia
Geological formation in Argentina
The Ischigualasto Formation is a Late Triassic geological formation in the Ischigualasto-Villa Unión Basin of northwestern Argentina (southwestern La Rioja
Ischigualasto_Formation
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
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
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
Genus of saurischian dinosaur
hunter') is an extinct genus of saurischian dinosaur known from the Late Triassic (Norian or Rhaetian ages) Chinle Formation of Ghost Ranch, New Mexico,
Ptychotherates
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
Sedimentary basin in England
Sandbach–Knutsford Sub-basin to its northeast. The basin fill is mainly Permian and Triassic sandstones and mudstones, but it also incorporates economically important
Cheshire_Basin
Extinct genus of reptiles
to the latest Ladinian stage of the late Middle Triassic, or the earliest Carnian of the Late Triassic. Luperosuchus was one of the largest carnivores
Luperosuchus
Extinct genus of dicynodonts
of dicynodont therapsid that lived in Brazil from the Middle Triassic to the Upper Triassic period. It was medium to large sized dicynodont with a skull
Dinodontosaurus
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
Extinct order of reptiles
Rhynchosaurs are a group of extinct herbivorous Triassic archosauromorph reptiles, belonging to the order Rhynchosauria. Rhynchosaurs are distinguished
Rhynchosauria
Extinct genus of reptiles
type specimen was found) is an extinct genus of archosaur from the Middle Triassic of Russia. It is currently regarded as an aphanosaur (an early-diverging
Dongusuchus
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
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
Extinct genus of dinosaurs
lived approximately 210 million years ago during the later part of the Triassic Period, in what is now Germany. Procompsognathus was a small-sized, lightly
Procompsognathus
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
Extinct genus of cynodonts
which lived in what are now South Africa and Antarctica during the Early Triassic. The genus contains a single species, T. liorhinus. Similar to other therapsids
Thrinaxodon
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
Extinct genus of reptiles
Kudnu is an extinct genus of neodiapsid reptile from the Early Triassic Arcadia Formation of Australia. The type species is K. mackinlayi. The holotype
Kudnu
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
Extinct genus of reptiles
'pavement') is an extinct genus of rhynchosaur reptiles which lived during Late Triassic period. Like other rhynchosaurs, it was a heavily built archosauromorph
Hyperodapedon
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
Paleoclimatological hypothesis
continued to shift toward one another and reached its maximum strength in the Triassic, when the continental surface area of Pangaea was at its peak. The megamonsoon
Pangean_megamonsoon
Various classifications of Dinosauria
Dinosauria, and a handful of small Triassic taxa as bird-line archosaurs. Marasuchus and Lagerpeton, from the Triassic of South America, were believed to
Dinosaur_classification
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
Extinct genus of dinosaurs
it lived approximately 231 to 228 million years ago, during the Late Triassic in Western Gondwana, in the region that is now northwestern Argentina.
Eoraptor
Genus of theropod dinosaurs
extinct genus of possibly coelophysoid theropod dinosaur from the Late Triassic (Rhaetian) Lilstock Formation of South Wales, Great Britain. The genus
Newtonsaurus
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
Group of Mesozoic aquatic reptiles
ancestors soon after the end-Permian extinction and flourished during the Triassic before all except for the Plesiosauria became extinct at the end of that
Sauropterygia
Extinct genus of reptiles
North America and potentially India (cf. Desmatosuchus) during the Late Triassic. Desmatosuchus was a large quadrupedal reptile measuring 4.5 m (15 ft)
Desmatosuchus
Extinct genus of reptiles
Silesaurus is a genus of silesaurid dinosauriform from the Late Triassic, of what is now Poland. The Krasiejów claypit near Opole, Poland, was first discovered
Silesaurus
Extinct genus of fishes
the Permian-Triassic extinction event. Fossils of Bobasatrania were found in beds of Changhsingian (late Permian) to Ladinian (Middle Triassic) age. It was
Bobasatrania
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
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
TRIASSIC
TRIASSIC
TRIASSIC
TRIASSIC
Boy/Male
Hindu, Indian
Who is Giving Imortality; Nector
Girl/Female
French Japanese
May. In Roman mythology Maia: (source of the month May) was goddess of spring growth.
Boy/Male
Arabic
Nobility; Good Manners
Girl/Female
American, British, English
Noble; Glorious; Highborn; Shining
Boy/Male
Celtic
Mythical Ulster chieftain.
Girl/Female
Indian
Complete, One
Female
Native American
Native American Blackfoot name KOKO means "night."
Boy/Male
Hindu, Indian
Armlet
Boy/Male
Tamil
Somdutta | ஸோமà¯à®¤à¯à®¤à¯à®¤à®¾
Boy/Male
Arabic, Muslim
Full Moon of the Faith
TRIASSIC
TRIASSIC
TRIASSIC
TRIASSIC
TRIASSIC
n.
A small extinct triassic mammal from North Carolina, the earliest yet found in America.
n.
The upper division of the European Triassic. See Chart of Geology.
n.
A silicified stem of tree fern, found in abundance in the Triassic sandstone.
a.
Of the age of, or pertaining to, the Trias.
n.
A large extinct genus of labyrinthodonts, found in the European Triassic rocks.
n. pl.
An extinct order of Amphibia, including the typical genus Labyrinthodon, and many other allied forms, from the Carboniferous, Permian, and Triassic formations. By recent writers they are divided into two or more orders. See Stegocephala.
a.
Pertaining to, or of the same horizon as, certain Mesozoic strata of the Rhetian Alps. These strata are regarded as closing the Triassic period. See the Chart of Geology.
a.
Specifically: Of or pertaining to, or characterizing, Triassic and Permian sandstones of red and other colors.
n.
One of an extinct genus of fossil cephalopods, allied to the Ammonites. The earliest forms are found in the Devonian formation, the latest, in the Triassic.
n.
A fossil footprint; as, the ichnites in the Triassic sandstone.
n. pl.
An extinct order of reptiles found in the Permian and Triassic formations in South Africa. In some respects they resembled carnivorous mammals. Called also Theromorpha.
n.
The Triassic formation.
n.
An extinct genus of small Triassic mammals, the oldest yet found in European strata.
n.
An extensive genus of fossil ferns, of which species have been found from the Devonian to the Triassic formation.
n.
One of a group of extinct reptiles having the jaws armed with a horny beak, as in turtles, and in the genus Dicynodon, supporting also a pair of powerful tusks. Their remains are found in triassic strata of South Africa and India.
n.
A kind of shell limestone, whose strata form the middle one of the three divisions of the Triassic formation in Germany. See Chart, under Geology.
n.
An extinct genus of huge vertebrates, probably dinosaurs, known only from four-toed tracks in Triassic sandstones.
n.
A term applied to many American Mesozoic strata, in which the characteristics of the Jurassic and Triassic periods appear to be blended.
n.
A genus of very large fossil amphibians, of the Triassic period, having bony plates on the under side of the body. It is the type of the order Labyrinthodonta. Called also Mastodonsaurus.