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Magnapaulia laticaudus
Taxonomy
Lambeosaurus laticaudus was named by Morris (1981). Its type specimen is LACM 17715 (=IGM 5843), a partial skeleton (coracoid), and it is a 3D body fossil. Its type locality is Arroyo El Rosario (LACM Loc. 66168), which is in a Campanian crevasse splay horizon in the El Gallo Formation of Mexico.
It was considered a nomen dubium by Gates et al. (2007); it was recombined as Magnapaulia laticaudus by Prieto-Marquez et al. (2012), Rivera-Sylva and Carpenter (2014), Xing et al. (2014), Ramírez-Velasco et al. (2014), Peecook and Sidor (2015), Tan et al. (2015), Prieto-Márquez and Gutarra (2016), Cruzado-Caballero and Powell (2017) and Holland et al. (2021).
It was considered a nomen dubium by Gates et al. (2007); it was recombined as Magnapaulia laticaudus by Prieto-Marquez et al. (2012), Rivera-Sylva and Carpenter (2014), Xing et al. (2014), Ramírez-Velasco et al. (2014), Peecook and Sidor (2015), Tan et al. (2015), Prieto-Márquez and Gutarra (2016), Cruzado-Caballero and Powell (2017) and Holland et al. (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 1981 | Lambeosaurus laticaudus Morris p. 454 figs. 1-3, Pl. 1-2 |
| 1983 | Lambeosaurus laticaudus Weishampel and Weishampel p. 44 |
| 1990 | Lambeosaurus laticaudus Weishampel and Horner p. 557 |
| 1993 | Lambeosaurus laticaudus Perrilliat p. 9 |
| 2004 | Lambeosaurus laticaudus Horner et al. p. 442 |
| 2006 | Lambeosaurus laticaudus Johnson et al. p. 579 |
| 2006 | Lambeosaurus laticaudus Lund and Gates p. 273 |
| 2006 | Lambeosaururs laticaudus Rivera-Sylva et al. p. 235 |
| 2007 | Lambeosaurus laticaudus Rodríguez-de la Rosa p. 53 |
| 2010 | Lambeosaurus laticaudus Bell and Evans p. 1426 |
| 2010 | Lambeosaurus laticaudus Prieto-Marquez and Salinas p. 828 |
| 2010 | Lambeosaurus laticaudus Prieto-Márquez p. 5 fig. 2 |
| 2010 | Lambeosaurus laticaudus Prieto-Márquez and Wagner p. 1243 fig. 3 |
| 2011 | Lambeosaurus laticaudus Prieto-Márquez p. 474 |
| 2011 | Lambeosaurus laticaudus Sullivan et al. p. 417 |
| 2012 | Lambeosaurus laticaudus Godefroit et al. p. 534 |
| 2012 | Magnapaulia laticaudus Prieto-Marquez et al. p. 3 figs. 2-21 |
| 2012 | Lambeosaurus laticaudus Prieto-Márquez p. 526 |
| 2012 | Lambeosaurus laticaudus Ramírez-Velasco et al. p. 380 |
| 2014 | Lambeosaurus laticaudus Guzmán-Gutiérrez and Rivera-Sylva p. 7 |
| 2014 | Magnapaulia laticaudus Ramírez-Velasco et al. p. 345 |
| 2014 | Magnapaulia laticaudus Rivera-Sylva and Carpenter p. 163 |
| 2014 | Magnapaulia laticaudus Xing et al. p. 1824 |
| 2015 | Magnapaulia laticaudus Peecook and Sidor p. 9 |
| 2015 | Magnapaulia laticaudus Tan et al. p. 253 |
| 2016 | Magnapaulia laticaudus Prieto-Márquez and Gutarra p. 141 |
| 2017 | Magnapaulia laticaudus Cruzado-Caballero and Powell p. 4 |
| 2021 | Magnapaulia laticaudus Holland et al. p. 11 |
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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.
†Magnapaulia laticaudus Morris 1981
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Morris 1981 | Large hadrosaurs, adult having an estimated length as measured along the axis of 14.0 to 15.0 meters. This species differs from all other species of Lambeosaurus in the great depth of the tail. Caudal haemal arches are long, matching the neural spines in length., | |
| A. Prieto-Marquez et al. 2012 | Lambeosaurine hadrosaurid possessing the following autapomorphies: longest haemal arches of proximal caudal vertebrae being at least four times longer than the depth of their respective centra, and the base of prezygapophyses in caudal vertebrae merging to form a bowl-shaped surface, which, in the proximal-most caudals, is continuous dorsally with a deep sulcus on the cranial surface of the neural spine. In addition, Magnapaulia laticaudus is characterized by the following unique combination of characters: downturned rostroventral process of the maxilla (convergent in Tsintaosaurus spinorhinus, Angulomastacator daviesi, and Olorotitan arharensis), the ventral margin of which forms a 18-degree angle with the alveolar margin of the element at its mid-length; tear-shaped external naris with length/width ratio between 1.85 and 2.85, being rostrocaudally longer than in Hypacrosaurus altispinus but shorter than in Lambeosaurus spp., Corythosaurus spp., and H. stebingeri, and mediolaterally wider than in Parasaurolophus walkeri (condition shared with Velafrons coahuilensis and convergent in Olorotitan arharensis); and greatly elongated neural spines (at least four times the depth of their respective centra) of dorsal, sacral, and proximal caudal vertebrae (convergent in Hypacrosaurus spp. for the dorsal neural spines and Barsboldia sicinskii for the sacral and proximal caudal neural spines). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||
Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | Mexico (Baja California) | Hypacrosaurus sp. (type locality: 55384) Magnapaulia laticaudus (170926 170927 170928) |