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Gryposaurus latidens
Taxonomy
Gryposaurus latidens was named by Horner (1992). Its type specimen is AMNH 5465, a partial skeleton, and it is a 3D body fossil. Its type locality is Hillside Quarry, MOR TM-055, which is in a Campanian terrestrial horizon in the Two Medicine Formation of Montana.
Synonymy list
| Year | Name and author |
|---|---|
| 1992 | Gryposaurus latidens Horner p. 13 figs. Pl. 42-43 |
| 2001 | Gryposaurus latidens Horner et al. p. 7 |
| 2001 | Gryposaurus latidens Trexler p. 303 |
| 2004 | Gryposaurus latidens Horner et al. p. 440 |
| 2006 | Gryposaurus latidens Lund and Gates p. 272 |
| 2006 | Gryposaurus latidens Prieto-Márquez et al. p. 88 |
| 2007 | Gryposaurus latidens Gates and Sampson p. 353 |
| 2008 | Gryposaurus latidens Godefroit et al. p. 68 |
| 2010 | Gryposaurus latidens Prieto-Marquez p. 853 |
| 2010 | Gryposaurus latidens Prieto-Marquez and Salinas p. 828 |
| 2010 | Gryposaurus latidens Prieto-Márquez p. 442 |
| 2010 | Gryposaurus latidens Prieto-Márquez and Norell p. 23 |
| 2010 | Gryposaurus latidens Prieto-Márquez and Wagner p. 1243 fig. 3 |
| 2011 | Gryposaurus latidens Prieto-Márquez p. 63 |
| 2012 | Gryposaurus latidens Godefroit et al. p. 18 fig. 19 |
| 2012 | Gryposaurus latidens Prieto-Márquez p. 511 |
| 2012 | Gryposaurus latidens Ramírez-Velasco et al. p. 392 |
| 2013 | Gryposaurus latidens Prieto-Marquez |
| 2014 | Gryposaurus latidens Farke and Herrero p. 191 |
| 2014 | Gryposaurus latidens Gates et al. p. 163 |
| 2014 | Gryposaurus latidens Prieto-Márquez and Wagner p. 595 |
| 2015 | Gryposaurus latidens Company et al. p. 78 |
| 2016 | Gryposaurus latidens Lehman et al. p. 345 |
| 2016 | Gryposaurus latidens Prieto-Márquez et al. p. 6 |
| 2016 | Gryposaurus latidens Prieto-Márquez and Gutarra p. 141 |
| 2017 | Gryposaurus latidens Bertozzo et al. p. 13 |
| 2017 | Gryposaurus latidens Cruzado-Caballero and Powell p. 7 |
| 2021 | Gryposaurus latidens Kobayashi et al. p. 6 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Gryposaurus latidens Horner 1992
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. A. Gates and S. D. Sampson 2007 | Dentary teeth shorter and wider than in other species of the genus. In addition, G. latidens possesses the following unique combination of characters: arched lateroventral margin on the maxilla; nasal arch positioned near the orbits and rising above the level of the frontals; and broad ‘U’-shaped posterior margin of the external naris. The humerus of G. latidens is larger and more robust than that of G. incurvimanus. | |
| A. Prieto-Marquez 2010 | Hadrosaurid dinosaur of the genus Gryposaurus characterized by the following autapomorphies: wide and short dentary teeth (ratio of dorsoventral length to anteroposterior width of 1.7; Prieto-Marquez, 2008); coarse denticulation in dentary teeth composed of large papillae; excavations on the ventral surface of the premaxilla for union of the anteroventral process of the maxilla; gentle nasal arch and dorsoventrally shallower narial bar at the posterodorsal margin of the narial fenestra; highest point of the nasal crest located directly above the posterior margin of the narial fenestra (the highest point is located posterior to the posterior margin of the narial fenestra in G. notabilis and G. monumentensis); and posterior margin of the narial fenestra broader than in G. notabilis and G. monumentensis (diagnosis modified from that in Horner, 1992, and Gates and Sampson, 2007). | |
| A. Prieto-Márquez 2012 | Saurolophine hadrosaurid of the genus Gryposaurus, possessing the following autapomorphies: wide and short dentary tooth crowns (apicobasal length/mesiodistal width ratio of 1.7–2.2) having a single median carina in the vast majority of teeth and, in ventral and anterior regions of the dental battery, coarse marginal denticulation composed of large papillae; deep and oval depression on the posterior region of the ventral surface of the premaxilla; and, in the context of Hadrosauridae, shallow lacrimal process of the rostral process of the jugal. In addition, G. latidens differs from G. notabilis and G. monumentensis in possessing a wider and more smoothly arcuate anterolateral oral margin of the premaxilla; posterior margin of the narial fenestra being wider than the dorsoventral depth of the proximal region of the narial bar, with a nasal crest that rises above the level of the frontals (in adults) and is located above the posterior margin of the narial fenestra; wide and shallow posteroventral margin of the rostral process of the jugal; angle between the proximal margin of the dentary and the alveolar edge of the tooth row greater than 150°; and narrower proximal constriction of the scapula (i.e., minimum width of constriction/maximum width of proximal region less than 0.60). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Benton 1983 | |||||
Age range: Middle Campanian or 83.50000 to 70.60000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Campanian | USA (Montana) | Gryposaurus latidens (47101) Hadrosauridae indet. (type locality: 142497) |