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Holtz and others noted similarities in the teeth of troodontids and iguanine lizards and suggested that the former family may not have been strict carnivores. [4] Holtz found that troodontids were the sister group to the ornithomimosaurs. [2] Catherine Forster and others found that troodontids were the sister group of the avialans. [2]
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).
Florida fossils are often very well preserved. [1] The oldest known fossils in Florida date back to the Eocene. At this time Florida was covered in a sea home to a variety of marine invertebrates and the primitive whales, such as Basilosaurus. During the later Miocene Florida was exposed as dry land again due to geologic uplift and mountain ...
A living Apalone ferox, or Florida softshell turtle †Florida †Florida caerulea †Floridaceras †Floridachoerus †Floridatragulus; Fontigens – report made of unidentified related form or using admittedly obsolete nomenclature; Fossaria †Fossaria cubensis; Fossarus; Fragum; Fulgurofusus; Shell in multiple views of a Fulguropsis whelk ...
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 ...
In their phylogenetic analyses, Lee et al. (2024) recovered Harenadraco, along with an unnamed specimen from the Wulansuhai Formation, as the earliest diverging members of an otherwise entirely Chinese clade of troodontids. This clade is the sister taxon to all other troodontids.
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 ...