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Laiyangosaurus youngi
Taxonomy
Laiyangosaurus youngi was named by Zhang et al. (2019). Its type specimen is IVPP V 23401, a partial skull (A large left maxilla, a right squamosal, and a left dentary), and it is a 3D body fossil. Its type locality is Jingangkou Locality 2, Laiyang (BNHM), which is in a Campanian crevasse splay mudstone in the Jingangkou Formation of China. It is the type species of Laiyangosaurus.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Laiyangosaurus youngi Zhang et al. p. 3 |
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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.
†Laiyangosaurus youngi Zhang et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J.-L. Zhang et al. 2019 | Laiyangosaurus youngi is a saurolophine hadrosaurid distinguished by autapomorphies that include a prominent and narrow ridge on the lateral side of the nasal which forms the posterodorsal and posterior margin of the circumnasal depression, a primary ridge in most maxillary teeth slightly deflected posteriorly, a retroarticular process of the surangular that is dorsolateroposteriorly recurved, and an orbital margin that is wider than the infratemporal margin of the jugal. L. youngi can be further distinguished by a number of unique character combination that includes dorsal margin of nasal is flat, absence supracranial crest, a relatively shallow and rostrodorsally directed caudal margin of the jugal lacrimal process, and expended anteroposteriorly as well as one or more foramina on the rostral surface of the premaxilla |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Benton 1983 | |||||