| 词条 | Haplocheirus |
| 释义 |
| name = Haplocheirus | taxon = Haplocheirus | fossil_range = Late Jurassic, {{fossilrange|160}} | image = Haplocheirus.jpg | image_caption = Holotype specimen | authority= Choiniere et al., 2010 | type_species = Haplocheirus sollers | type_species_authority = Choiniere et al., 2010 }}Haplocheirus is a genus of alvarezsauroid theropod dinosaur. It is the earliest member of its clade.[1] It is the oldest known alvarezsauroid, predating all other members by about 63 million years. Haplocheirus was described in 2010 from a fossil specimen found from the 160-million-year-old Shishugou Formation in the Junggar Basin of northwestern China. The type species is H. sollers, meaning "simple-handed skillful one", referencing its hypothesized behavior of using its three-fingered hands for activities other alvarezsauroids couldn't, such as catching prey.[1][2] DescriptionHaplocheirus was the largest known definite alvarezsauroid, at around 2 meters long. It had an enlarged thumb claw like other alvarezsauroids, but also retained two other functional fingers, unlike more derived alvarezsauroids, where only the thumb was significantly large and clawed. It had long legs and was probably a fast runner. See also{{Portal|Dinosaurs}}
References1. ^1 {{cite journal |last=Choiniere |first=J. N. |author2=Xu, X. |author3=Clark, J. M. |author4=Forster, C. A. |author5=Guo, Y. |author6= Han, F. |year=2010 |title=A basal alvarezsauroid theropod from the Early Late Jurassic of Xinjiang, China |journal=Science |pmid=20110503 |volume=327 |issue=5965 |pages= 571–574 |doi=10.1126/science.1182143}} 2. ^Choiniere, J. (2010). Guest Post: Haplocheirus, the Skillful One Dave Hone's Archosaur Musings, April 23, 2011. External links
7 : Alvarezsaurs|Late Jurassic dinosaurs of Asia|Biota of Xinjiang|Paleontology in Xinjiang|Mesozoic China|Monotypic dinosaur genera|Fossil taxa described in 2010 |
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