The Hettangian is the earliest age and lowest stage of the Jurassic Period of the geologic timescale. It spans the time between 201.3 ± 0.2 Ma and 199...

chronostratigraphy). It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest age of the Jurassic). The base of the...

meaning 'lizard') is a genus of ichthyosaurs from the Early Jurassic (Hettangian - Pliensbachian), with possible Late Triassic record, from Europe (Belgium...

Early Jurassic, but also including part of the preceding Rhaetian. The Hettangian Stage was named by Swiss palaeontologist Eugène Renevier in 1864 after...

"flat stone". There has been some debate over the actual base of the Hettangian Stage, and so of the Jurassic System itself. Biostratigraphically, the...

to the suborder Darwinulocopina is described from the Lower Jurassic (Hettangian) Whitmore Point Member of the Moenave Formation (Arizona and Utah, United...

recovery began in the late early Hettangian and lasted until a new biodiversity equilibrium in the late Hettangian. Also despite recurrent anoxic episodes...

Toarcian 184.2 ± 0.7 * Pliensbachian 192.9 ± 1.0 * Sinemurian 199.5 ± 0.3 * Hettangian 201.4 ± 0.2 * Triassic Upper/Late Rhaetian Archosaurs dominant on land...

A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (ἀνούρα, literally without...

Sinemurian is preceded by the Hettangian and is followed by the Pliensbachian. In Europe the Sinemurian age, together with the Hettangian age, saw the deposition...

quadrupedal locomotion Abrictosaurus 1975 Elliot Formation (Early Jurassic, Hettangian to Sinemurian)  Lesotho  South Africa Known from two skulls, one of which...

Formation, United Kingdom, Rhaetian/Hettangian Orthophlebia varia Martynova 1948 Dzhil Formation, Kyrgyzstan, Hettangian-Sinemurian Orthophlebia venosa Martynov...

Ginkgoites, Sphenobaiera and Eretmophyllum types. It is known from the Hettangian to Aptian of both Hemispheres. Zhou, Zhi-Yan (March 2009). "An overview...

yingliangis. Dornraptor Gen. et sp. nov Valid Baron Early Jurassic (Hettangian–Sinemurian) Blue Lias Formation  United Kingdom An averostran theropod...

Caecilians (/sɪˈsɪliən/; New Latin for 'blind ones') are a group of limbless, vermiform (worm-shaped) or serpentine (snake-shaped) amphibians with small...

with the oldest known species being Schobertella hoelderi from the late Hettangian of Germany. Hermit crabs can be informally divided into two groups: aquatic...

Lizard is the common name used for all squamate reptiles other than snakes (and to a lesser extent amphisbaenians), encompassing over 7,000 species, ranging...

Notocupes is an extinct genus of medium-sized archostematan beetles from the Mesozoic Era of Eurasia, including over 50 described species. Historically...

Unwin, D.M. (1993). "An ichthyosaur embryo from the Lower Lias (Jurassic: Hettangian) of Somerset, England, with comments on the reproductive biology of ichthyosaurs"...

phalanx series, and a shortened tail. From the earliest Jurassic, the Hettangian stage, a rich radiation of plesiosaurs is known, implying that the group...

oldest specimen may be a skull thought to come from late Rhaetian or early Hettangian rocks. Paleontology portal Timeline of plesiosaur research List of plesiosaur...

Carboniferous (Viséan–Serpukhovian) †Genus Squaloraja Europe, Early Jurassic (Hettangian–Sinemurian) †Suborder Myriacanthoidei Patterson 1965 (Late Triassic–Late...

lower jaw from a longirostrine archosaur has been described from early Hettangian strata in the town of Watchet in Somerset, England. While teleosaurid...

of Pangea Area  • Total 11,000,000 km2 (1.2×1014 sq ft) Dimensions  • Length 5,000 km (3,100 mi)  • Width 2,500 km (1,600 mi) Last eruption Hettangian...

Early Jurassic period. They lived between 200 and 175 million years ago (Hettangian-Toarcian) in what is now Western Europe (England, France, Luxembourg,...

Wartlike load casts in Hettangian arkoses from the northern Aquitaine Basin...

−150 — – −145 — – Mesozoic T Jurassic K Late T Early Middle Late Early K Hettangian Sinemurian Pliensbachian Toarcian Aalenian Bajocian Bathonian Callovian...

Changhsing. Olenekian Induan Anisian Ladinian Carnian Norian Rhaetian Hettangian         Subdivision of the Triassic according to the ICS, as of 2021....

Conodonts Temporal range: Cambrian to Earliest Jurassic (Hettangian) PreꞒ Ꞓ O S D C P T J K Pg N Conodont elements Scientific classification Domain: Eukaryota...

mognai PVSJ568 National University of San Juan Uncertain, Early Jurassic (Hettangian to Toarcian) Cañón del Colorado Formation, Cuyo A skull and a mostly complete...