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Hylonomus (/ h aɪ ˈ l ɒ n əm ə s /; hylo-"forest" + nomos "dweller") [2] is an extinct genus of reptile that lived during the Bashkirian stage of the Late Carboniferous.It is the earliest known crown group amniote and the oldest known unquestionable reptile, with the only known species being Hylonomus lyelli.
Nyasasaurus (meaning "Lake Nyasa lizard") is an extinct genus of avemetatarsalian archosaur from the putatively Middle Triassic Manda Formation of Tanzania that may be the earliest known dinosaur. The type species Nyasasaurus parringtoni was first described in 1956 in the doctoral thesis of English paleontologist Alan J. Charig , but it was not ...
There are three main life history events that lepidosaurs reach: hatching/birth, sexual maturity, and reproductive senility. [33] Because gular pumping is so common in squamates, and is also found in the tuatara, it is assumed that it is an original trait in the group. [34] Most lepidosaurs rely on camouflage as one of their main defenses. Some ...
The herbivorous Alierasaurus was the largest caseid and the largest amniote to have lived at the time, with an estimated length around 6–7 m (20–23 ft). [3] Cotylorhynchus hancocki is also large, with an estimated length and weight of at least 6 m (20 ft) [4] and more than 500 kg (1,100 lb). [5]
The oldest undisputed lizards date to the Middle Jurassic, from remains found In Europe, Asia and North Africa. [54] Lizard morphological and ecological diversity substantially increased over the course of the Cretaceous. [55] In the Palaeogene, lizard body sizes in North America peaked during the middle of the period. [56]
Mosasaurus (/ ˌ m oʊ z ə ˈ s ɔːr ə s /; "lizard of the Meuse River") is the type genus (defining example) of the mosasaurs, an extinct group of aquatic squamate reptiles.It lived from about 82 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous.
The Oldest Living Organism Is Over 2 Billion Years Old Scientists have identified the oldest living species on Earth is a deep sea organism that hasn't evolved in more than two billion years.
Lystrosaurus (/ ˌ l ɪ s t r oʊ ˈ s ɔːr ə s /; 'shovel lizard'; proper Ancient Greek is λίστρον lístron ‘tool for leveling or smoothing, shovel, spade, hoe’) is an extinct genus of herbivorous dicynodont therapsids from the late Permian and Early Triassic epochs (around 248 million years ago).