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Ziapelta sanjuanensis
Taxonomy
Ziapelta sanjuanensis was named by Arbour et al. (2014). Its type specimen is NMMNH P-64484, a partial skeleton, and it is a 3D body fossil. Its type locality is NMMNH L-8514, Hunter Wash, which is in a Campanian terrestrial horizon in the Kirtland Formation of New Mexico.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Ziapelta sanjuanensis Arbour et al. p. 4 fig. 2–4a,b |
| 2015 | Ziapelta sanjuanensis Burns and Lucas p. 11 |
| 2015 | Ziapelta sanjuanensis Jasinski p. 79 |
| 2016 | Ziapelta sanjuanensis Arbour and Currie p. 422 |
| 2017 | Ziapelta sanjuanensis Arbour and Mallon p. 772 |
| 2018 | Ziapelta sanjuanensis Penkalski p. 264 |
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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.
†Ziapelta sanjuanensis Arbour et al. 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. M. Arbour et al. 2014 | Ziapelta is unique among ankylosaurids in having the following features: prominent, large, sub-triangular median nasal caputegulum; dorsoventrally deep squamosal horns curved anteriorly at the tips; three deep fossae on the ventral surface of the basicranium. Differs from other ankylosaurids in possessing a mixture of flat and weakly bulbous frontonasal caputegulae. Differs from Nodocephalosaurus kirtlandensis in the irregular basal shape of the frontonasal caputegulae and in the manner in which the caputegulae are bulbous (conical in Nodocephalosaurus, irregularly convex in Ziapelta), and the shape of the squamosal horns, which have a sharper, more prominent dorsal keel. Distal osteoderm of the cervical half ring does not envelop the terminus of the underlying bony band, unlike the condition in Ankylosaurus magniventris, Anodontosaurus lambei, Euoplocephalus tutus, and Scolosaurus cutleri. | |
| V. M. Arbour and P. J. Currie 2016 | Ankylosaurine ankylosaurid with bulbous cranial ornamentation. Unlike other ankylosaurs, squamosal horn has unique smooth-textured keel offset from the rest of the squamosal horn by a distinct and abrupt change to a granular texture; elaborate pattern of postocular caputegulae covering entire postocular region between squamosal and quadratojugal horns, with more postocular caputegulae than Anodontosaurus lambei, Saichania chulsanensis or Tarchia kielanae. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: Late/Upper Campanian or 83.60000 to 72.20000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (New Mexico) | Ziapelta sanjuanensis (type locality: 169229) |