PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Yaverlandia

Reptilia

Taxonomy

Yaverlandia was named by Galton (1971). Its type is Yaverlandia bitholus.

It was assigned to Homalocephaleridae by Dong (1978); to Pachycephalosauridae by Galton (1971), Maryańska and Osmólska (1974), Thulborn (1974), Galton (1974), Galton (1975), Wall and Galton (1979), Molnar (1980), Sues and Galton (1987), Carroll (1988), Hutt et al. (1989), Maryanska (1990), Le Loeuff (1991), Olshevsky and Ford (1994), Blows (1998); to Pachycephalosauria by Norman (1997), Buffetaut (1997), Sereno (2000), Ruiz-Omeñaca and Canudo (2003); to Pachycephalosauria by Dodson (1990), Williamson and Carr (2003), Maryanska et al. (2004), Williamson and Carr (2006); to Maniraptora by Naish and Martill (2008); and to Theropoda by Sullivan (2006), Butler and Sullivan (2009).

Species

Y. bitholus (type species)

Synonymy list

Year	Name and author
1971	Yaverlandia Galton
1974	Yaverlandia Galton p. 1064 fig. 6
1974	Yaverlandia Maryańska and Osmólska p. 47
1974	Yaverlandia Thulborn p. 173
1975	Yaverlandia Galton p. 748
1978	Yaverlandia Dong p. 228
1979	Yaverlandia Wall and Galton p. 1185
1980	Yaverlandia Molnar p. 137
1987	Yaverlandia Sues and Galton
1988	Yaverlandia Carroll
1989	Yaverlandia Hutt et al. p. 145
1990	Yaverlandia Dodson p. 562
1990	Yaverlandia Maryanska p. 566
1991	Yaverlandia Le Loeuff p. 105
1994	Yaverlandia Olshevsky and Ford p. 91
1997	Yaverlandia Buffetaut p. 214
1997	Yaverlandia Norman p. 784
1998	Yaverlandia Blows p. 32
2000	Yaverlandia Sereno p. 500 fig. 25.8
2003	Yaverlandia Ruiz-Omeñaca and Canudo p. 298
2003	Yaverlandia Williamson and Carr fig. 11
2004	Yaverlandia Maryanska et al. p. 465
2006	Yaverlandia Sullivan p. 361
2006	Yaverlandia Williamson and Carr pp. 325-326 fig. 2
2008	Yaverlandia Naish and Martill p. 620
2009	Yaverlandia Butler and Sullivan p. 32

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota

Rank	Name	Author
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Theropoda	()
genus	Yaverlandia

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.

G. †Yaverlandia Galton 1971

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†Yaverlandia bitholus Galton 1971

Diagnosis

Reference	Diagnosis
P. M. Galton 1971	Skull cap thickened with twp small domes, one per frontal; dorsal surface pitted; frontal not excluded from the edge of the orbit by the prefrontal; supratemporal fenestra not constricted to any extent by the postorbital.