| 词条 | Suuwassea |
| 释义 |
| fossil_range = Late Jurassic | image = Suuwassea.jpg | image_caption = Restored skeleton, Paris | display_parents = 2 | genus = Suuwassea | parent_authority = Harris & Dodson, 2004 | species = emilieae | authority = Harris & Dodson, 2004 }} Suuwassea (meaning "ancient thunder") is a genus of dicraeosaurid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, United States. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000, described by J.D. Harris and Peter Dodson in 2004. They consist of a disarticulated but associated partial skeleton, including partial vertebral series and limb bones. EtymologySince the fossil was found in an ancestral territory of the Native American Crow tribe, the etymology of the generic name is derived from a term in their language, suuwassa, “the first thunder heard in spring”. The root suu, meaning “thunder” and wassa, “ancient”, are a nod to the “thunder lizard” moniker often applied to sauropods. The specific descriptor honours the deceased sponsor of the expeditions that recovered the fossil. DescriptionSuuwassea is a dicraeosaurid, estimated to have been {{convert|14|to|15|m|ft|sp=us}} long, characterized by skull and axial skeleton features it shares with Diplodocidae and Dicraeosauridae though it is too primitive to pertain to any of the latter clades. The herbivore differs from dicraeosaurids in the unfused state of the frontal, and from diplodocids in the arrangement of bones around the foramen magnum, though it possesses a greater number of similarities with the latter than with clade Dicraeosauridae. ClassificationIn the original description, Suuwassea was placed at Flagellicaudata incertae sedis due to the mosaic of primitive and derived characters found in both dicraeosaurids and diplodocids. Later phylogenetic analysis placed it as a member of the diplodocid subfamily Apatosaurinae,[1] but subsequent studies recovered it as the only North American member of Dicraeosauridae.[2][3] A cladogram showing Suuwassea among other Dicraeosauridae, according to Tschopp et al., 2015:[3] {{clade|{{clade|label1=Dicraeosauridae |1={{clade |1=Dyslocosaurus polyonychius |2={{clade |1={{clade |1=Suuwassea emilieae |2=Dystrophaeus viaemalae }} |2={{clade |1=Brachytrachelopan mesai |2={{clade |1=Amargasaurus cazaui |2=Dicraeosaurus hansemanni }}}}}}}}}} |}} References1. ^{{cite journal |last1=Lovelace |first1=David M |last2=Hartman |first2=Scott A |last3=Wahl |first3=William R. |title=Morphology of a specimen of Supersaurus (Dinosauria, Sauropoda) from the Morrison Formation of Wyoming, and a re-evaluation of diplodocid phylogeny |journal=Arquivos do Museu Nacional |date=2008 |volume=65 |issue=4 |pages=527–544}} 2. ^{{Cite journal|last=Whitlock|first=John A.|date=2011-04-01|title=A phylogenetic analysis of Diplodocoidea (Saurischia: Sauropoda)|journal=Zoological Journal of the Linnean Society|language=en|volume=161|issue=4|pages=872–915|doi=10.1111/j.1096-3642.2010.00665.x|issn=1096-3642}} 3. ^1 {{Cite journal|last=Tschopp|first=Emanuel|last2=Mateus|first2=Octávio|last3=Benson|first3=Roger B.J.|date=2015-04-07|title=A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)|url=https://peerj.com/articles/857|journal=PeerJ|language=en|volume=3|pages=e857|doi=10.7717/peerj.857|issn=2167-8359|pmc=4393826|pmid=25870766}} Sources
6 : Dicraeosaurids|Late Jurassic dinosaurs of North America|Dinosaurs of the Morrison Formation|Fossil taxa described in 2004|Taxa named by Peter Dodson|Paleontology in Montana |
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