Ferganocephale was possibly an early pachycephalosauria

Pachycephalosauria

Pachycephalosauria is a clade of ornithischian dinosaurs. Well-known genera include Pachycephalosaurus, Stegoceras, Stygimoloch, and Dracorex. Most lived during the Late Cretaceous Period, in what is now North America and Asia. They were all bipedal, herbivorous/omnivorous animals with thick skulls...

n dinosaur

Dinosaur

Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...

. It was from the Middle Jurassic

Jurassic

The Jurassic is a geologic period and system that extends from about Mya to  Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...

 of Kyrgyzstan

Kyrgyzstan

Kyrgyzstan , officially the Kyrgyz Republic is one of the world's six independent Turkic states . Located in Central Asia, landlocked and mountainous, Kyrgyzstan is bordered by Kazakhstan to the north, Uzbekistan to the west, Tajikistan to the southwest and China to the east...

.

The type species, Ferganocephale adenticulatum, was first described by Averianov, Martin, and Bakirov in 2005, and is based solely on teeth from the Callovian

Callovian

In the geologic timescale, the Callovian is an age or stage in the Middle Jurassic, lasting between 164.7 ± 4.0 Ma and 161.2 ± 4.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the Oxfordian....

. The holotype

Holotype

A holotype is a single physical example of an organism, known to have been used when the species was formally described. It is either the single such physical example or one of several such, but explicitly designated as the holotype...

 is ZIN PH 34/42, an adult unworn tooth. The type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

 is Ferganocephale adenticulatum. The genus name combines the name of Fergana Province

Fergana Province

Fergana Province is a viloyat of Uzbekistan, located in the southern part of the Fergana Valley in the far east of the country. It borders the Namangan and Andijan Provinces of Uzbekistan, as well as Kyrgyzstan and Tajikistan. It covers an area of 6,800 km2...

 with a Greek kephale, "head", a reference to the presumed pachycephalosaurian affinities. The specific name means "without tooth serrations" in Neolatin.

Averianov e.a. classified Ferganocephale in the Pachycephalosauridae. It would then be one of the oldest known pachycephalosaurids. Robert Sullivan

Robert Sullivan

Robert Sullivan may refer to:*Robert Sullivan *Robert Baldwin Sullivan, Canadian lawyer, judge, and the second Mayor of Toronto*Robert J. Sullivan, Jr. , American politician...

 however, in 2006 disputed the pachycephalosaur classification, finding "few of the features [...] are characteristic of pachycephalosaur teeth," citing the lack of serrations on the teeth, and concludes the specimens are "too incomplete for identification". He considers the taxon

Taxon

|thumb|270px|[[African elephants]] form a widely-accepted taxon, the [[genus]] LoxodontaA taxon is a group of organisms, which a taxonomist adjudges to be a unit. Usually a taxon is given a name and a rank, although neither is a requirement...

 a nomen dubium

Nomen dubium

In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...

http://www.robertmsullivanphd.com/uploads/130_Sullivan__2006__-Pachycephalosauridae.pdf.