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- (Inggris) Encyclopaedia Britannica Encyclopaedia Britannica.
- (Inggris) Integrated Taxonomic Information, sistem informasi taksonomi terintegrasi.
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{{italictitle}} {{taxobox | name = ''Xixiasaurus'' | taxon = Xixiasaurus henanensis | fossil_range = [[Late Cretaceous]], {{fossilrange|83}} | image = Xixiasaurus henanensis.jpg | image_alt = Skull | image_width = 250px | image_caption = Skull | genus = Xixiasaurus | parent_authority = [[Junchang Lü|Lü]] ''et al.'', [[2010 in paleontology|2010]] | species = henanensis | binomial_authority = Lü ''et al.'', 2010 }} '''''Xixiasaurus''''' adalah [[genus]] [[dinosaurus]] [[troodontid]] dari akhir era [[Cretaceous]] yang ditemukan di [[China]]. Pertamakali dideskripsikan pada tahun [[2010]]. Jenis spesiesnya disebut '''''X. henanensis'''''. Fosil ''Xixiasaurus'' ditemukan di [[China]], di [[Formasi Majiacun]], [[Provinsi Henan]], dan dipercaya hidup pada zaman [[Cretaceous]] akhir ([[Coniacian]]-[[Campanian]], sekitar 83 [[juta tahun lalu]]). Fosil dideskripsikan oleh tim ilmuwan China, yang merupakan gabungan Lembaga penelitian ilmu geologi di [[Beijing]] dan Museum geologi Henan di Henan. Mereka memilih nama ''Xixiasaurus henanensis'', yang artinya "Kadal dari Henan Xixia". ==Ciri-ciri== [[File:Xixiasaurus.jpg|thumb|left|Life restoration]] ''Xixiasaurus'' adalah [[troodontid]], kelompok yang kecil, menyerupai burung, [[wikt:gracile|gracile]] [[maniraptora]]ns. Semua troodontida memiliki banyak hal unik pada tengkoraknya, seperti gigi yang lebih rapat di rahang bawah, dan jumlah gigi sangat banyak. Troodontida memiliki cakar melengkung dan tangan yang liar, dan beberapa of the highest non-[[Bird|avian]] [[encephalization quotient]]s, meaning they were behaviourally advanced and had keen senses.<ref name="Lüetal"/> ''Xixiasaurus'' is about {{convert|1.2|m|ft|abbr=on}} long.<ref name="mm"/> It is one of few troodontids that have no [[serrated|serrations]] on its teeth, similar to its closest relative ''[[Byronosaurus]]''. ''Xixiasaurus'' has fewer teeth than ''Byronosaurus'' and ''[[Mei long|Mei]]'', but more than ''[[Sinornithoides]]'', ''[[Zanabazar junior|Zanabazar]]'' and ''[[Saurornithoides]]''. Like ''Bryonosaurus'', the [[palate]] is extensive, and the teeth are [[heterodont]].<ref name="Lüetal">{{cite journal|author= Junchang Lü, Li Xu, Yongqing Liu, Xingliao Zhang, Songhai Jia, and Qiang Ji |year= 2010 |title= A new troodontid (Theropoda: Troodontidae) from the Late Cretaceous of central China, and the radiation of Asian troodontids. |journal= Acta Palaeontologica Polonica |volume=55 |issue=3 |pages=381–388 |doi= 10.4202/app.2009.0047 |url=http://www.app.pan.pl/archive/published/app55/app20090047.pdf}}</ref> ''Xixiasaurus'' is known from a mostly complete skull, only lacking the [[anatomical terms of location#Anterior and posterior|posterior]] portion. The top of the snout is slightly displaced, but overall, the skull resembles ''Bryonosaurus''. As the [[nasal bones]] are very not and not completely fused, the [[holotype]] of ''Xixiasaurus'' may have died immature. Most of the [[braincase]] is preserved, as well as most teeth and all [[tooth socket]]s. Viewed from below, the tooth rows form a U-shaped curve. Some small pits are present of the [[anatomical terms of location#Lateral|lateral]] surface of the [[maxilla]]. The teeth on the maxilla are larger than those in the [[premaxilla]]. The hand and lower [[arm]] are also preserved. The claw of the first digit is very large, with a large [[tubercle|flexor tubercle]]. The first [[phalanges]] of the first two digits are {{convert|3.6|cm|in|abbr=on}} and {{convert|3|cm|in|abbr=on}} long, respectively.<ref name="Lüetal"/> ==Discovery== [[File:Xixiasaurus hand bones.jpg|thumb|upright|left|Hand bones]] ''Xixiasaurus henanensis'' was first described in [[2010 in paleontology|2010]] as a new [[binomial]], which was from the [[Late Cretaceous]] of [[China]]. The holotype specimen is HGM 41HIII−0201, which includes most of a skull and a partial lower arm. ''Xixiasaurus'' was chosen as the [[genus]] name in reference to the [[Xixia Basin]], where the fossils were found, and ''saurus'', meaning "lizard". The species name was chosen for the [[Henan Province]], where the basin is located.<ref name="Lüetal"/> Thus, the name translates to "Henan Xixia lizard".<ref name="mm">{{cite book|last=Martyniuk|first=M.P.|year=2012|title=A Field Guide to Mesozoic Birds and Other Winger Dinosaurs|publisher=Pan Aves|page=102|isbn=978-0-9885965-0-4}}</ref> ''Xixiasaurus'' is from the middle region of the [[Majiacun Formation]], which dates to the [[Coniacian]]-[[Campanian]], about 83 million years ago.<ref name="Lüetal"/> ==Referensi== {{Reflist}} [[Kategori:Dinosaurs]] {{Dinosaurus-stub}}