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Platypelta coombsi

Osteichthyes - Ankylosauridae

Taxonomy
Platypelta coombsi was named by Penkalski (2018). Its type specimen is AMNH 5337, a partial skeleton, and it is a 3D body fossil. Its type locality is right bank, Sand Creek (125 ft level) [AMNH], which is in a Campanian terrestrial horizon in the Oldman Formation of Canada. It is the type species of Platypelta.

Synonymy list
YearName and author
2018Platypelta coombsi Penkalski p. 266–267

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
RankNameAuthor
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Thyreophora()
Ankylosauria()
familyAnkylosauridae
subfamilyAnkylosaurinaeNopcsa 1918
tribeEuoplocephalini
genusPlatypelta
speciescoombsi

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.

Platypelta coombsi Penkalski 2018
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Diagnosis
ReferenceDiagnosis
P. Penkalski 2018A large (6+ m) ankylosaurine characterised primarily by the presence of large (>25 cm), rugose, sharply keeled, plate-like osteoderms, some with pointed, beak-like ends; snout constricted rostral to orbits; premaxillary scoop rounded and relatively narrow; vomer overlaps fused premaxillae caudally; occipital condyle large; squamosal horns low, rugose and broad-based, with (pitted) caudal apex; tooth crowns highly sculptured; weak ventral flexion of preacetabular process of ilium; ulna long, gracile; robust pes with arcuate pedal unguals; h.r.1 medial osteoderms elongate and partially keeled with conical prominence; h.r.1 laterals with caudal apex and curved but unkinked (i.e., non-sigmoidal) keel. P. coombsi is distinguished from Euoplocephalus and Anodontosaurus by skull shape and armour texture. P. coombsi is distinguished from D. acutosquameus in having only two sacral ribs aligned with the acetabulum, by one less sacrocaudal (4-3-1 count), by less curvature of the preacetabular process, by a more robust sc1, and by arcuate pedal unguals. P. coombsi differs from Scolosaurus, O. horneri, and Z. crurivastator in skull and squamosal horn shape.