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Artistic restoration of Byronosaurus with secretary bird-like plumage. This timeline of troodontid research is a chronological listing of events in the history of paleontology focused on the troodontids, a group of bird-like theropod dinosaurs including animals like Troodon.
Troodontidae / t r oʊ. ə ˈ d ɒ n t ɪ d iː / is a clade of bird-like theropod dinosaurs from the Late Jurassic to Late Cretaceous. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages.
Troodon (/ ˈ t r oʊ. ə d ɒ n / TROH-ə-don; Troödon in older sources) is a former wastebasket taxon and a potentially dubious genus of relatively small, bird-like theropod dinosaurs definitively known from the Campanian age of the Late Cretaceous period (about 77 mya).
Jinfengopterygines were relatively small sized troodontids ranging from about 0.5–2 m (1.8–6.6 ft), [1] [2] and like other troodontids had a pair of sickle claws on each foot. These animals were feathered, as most troodontids presumably were, as shown in the type species, with typical feathering around the body an neck and especially long ...
While Pectinodon is only known from teeth, its larger family Troodontidae is known from much more complete specimens. They were small, bird-like feathered bipedal maniraptorans with proportionally large eyes and brains. Like dromaeosaurids, they possessed a "sickle-claw" on the second toe of each foot. See the Troodontidae article for more ...
In 1994, Sinornithoides was one of the most completely known troodontids, especially as regarded the palate, but the lack of sufficient fossil material to compare it with induced Russell and Dong not to indicate any diagnostic traits. [2] The skull of Sinornithoides is elongated and pointed. However, the head is relatively short compared to the ...
Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian encephalization quotients, meaning they were behaviourally advanced and had keen senses. [2] Talos is approximately 2 metres (6.6 ft) in length, and its weight has been estimated at thirty-eight kilograms.
All troodontids have many unique features of the skull, such as closely spaced teeth in the lower jaw, and large numbers of teeth. Troodontids have sickle-claws and raptorial hands, and some of the highest non-avian encephalization quotients, meaning they were behaviourally advanced and had keen senses. [15] Saurornithoides was a rather small ...