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Dilong is a genus of small basal tyrannosauroid dinosaurs. The only species in the genus is Dilong paradoxus, known from the Lower Cretaceous Yixian Formation of East Asia. The discovery of Dilong was significant as it provided the first evidence of feathers in tyrannosaurs, something which had previously been suspected for the group.
Alvarezsauridae is a family of small, long-legged dinosaurs. Although originally thought to represent the earliest known flightless birds, they are now thought to be an early diverging branch of maniraptoran theropods. Alvarezsaurids were highly specialized. They had tiny but stout forelimbs, with compact, bird-like hands. Their skeletons suggest that they had massive breast and arm muscles, possibly adapted for digging or tearing. They had long, tube-shaped snouts filled with tiny teeth. They have been interpreted as myrmecophagous, adapted to prey on colonial insects such as termites, with the short arms acting as effective digging instruments to break into nests.
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Guanlong (冠龍) is a genus of extinct proceratosaurid tyrannosauroid dinosaur from the Late Jurassic of China. The taxon was first described in 2006 by Xu Xing et al., who found it to represent a new taxon related to Tyrannosaurus. The name is derived from Chinese, translating as "crown dragon". Two individuals are currently known, a partially complete adult and a nearly complete juvenile. These specimens come from the Oxfordian stage of the Chinese Shishugou Formation.
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Unnuakomys is an extinct genus of metatherian mammal from the Maastrichtian age of the Late Cretaceous. It was discovered in the Prince Creek Formation of Alaska, and is the northernmost metatherian known. The type species is U. hutchisoni.
References
- ↑ http://www.bio.fsu.edu/erickso%5B%5Dn/ .
- ↑ Eberle, Jaelyn J.; Clemens, William A.; Erickson, Gregory M.; Druckenmiller, Patrick Scott (5 August 2023). "A new tiny eutherian from the Late Cretaceous of Alaska". Journal of Systematic Palaeontology . 21 (1). doi:10.1080/14772019.2023.2232359. ISSN 1477-2019 . Retrieved 7 January 2025– via Taylor and Francis Online.
- ↑ Eberle, Jaelyn J.; Clemens, William A.; McCarthy, Paul J.; Fiorillo, Anthony Ricardo; Erickson, Gregory M.; Druckenmiller, Patrick S. (2 November 2019). "Northernmost record of the Metatheria: a new Late Cretaceous pediomyid from the North Slope of Alaska". Journal of Systematic Palaeontology . 17 (21): 1805–1824. doi:10.1080/14772019.2018.1560369. ISSN 1477-2019 . Retrieved 5 January 2025– via Taylor and Francis Online.
- ↑ Napoli, James G.; Hunt, Tyler; Erickson, Gregory M.; Norell, Mark A. (25 July 2019). "Psittacosaurus amitabha, a New Species of Ceratopsian Dinosaur from the Ondai Sayr Locality, Central Mongolia". American Museum Novitates . 2019 (3932): 1. doi:10.1206/3932.1. ISSN 0003-0082 . Retrieved 6 January 2025– via BioOne Digital Library.
- ↑ Makovicky, Peter J.; Li, Daqing; Gao, Ke-Qin; Lewin, Matthew; Erickson, Gregory M.; Norell, Mark A. (22 January 2010). "A giant ornithomimosaur from the Early Cretaceous of China". Proceedings of the Royal Society B: Biological Sciences . 277 (1679): 191–198. doi:10.1098/rspb.2009.0236. ISSN 0962-8452. PMC 2842665 . PMID 19386658 . Retrieved 11 January 2025– via The Royal Society Publishing.
- ↑ Xu, Xing; Clark, James M.; Mo, Jinyou; Choiniere, Jonah; Forster, Catherine A.; Erickson, Gregory M.; Hone, David W. E.; Sullivan, Corwin; Eberth, David A.; Nesbitt, Sterling; Zhao, Qi; Hernandez, Rene; Jia, Cheng-kai; Han, Feng-lu; Guo, Yu (18 June 2009). "A Jurassic ceratosaur from China helps clarify avian digital homologies". Nature . 459 (7249): 940–944. doi:10.1038/nature08124. ISSN 1476-4687 . Retrieved 2 February 2025.
- ↑ Xu, Xing; Clark, James M.; Forster, Catherine A.; Norell, Mark A.; Erickson, Gregory M.; Eberth, David A.; Jia, Chengkai; Zhao, Qi (9 February 2006). "A basal tyrannosauroid dinosaur from the Late Jurassic of China". Nature . 439 (7077): 715–718. doi:10.1038/nature04511. ISSN 0028-0836 . Retrieved 7 January 2025.