[2] In their phylogenetic analyses, Lee et al. (2024) recovered Harenadraco, along with an unnamed specimen from the Wulansuhai Formation, as the earliest diverging members of an otherwise entirely Chinese clade of troodontids.

taxon)[3] Almas Philovenator Talos Gobivenator Xixiasaurus Byronosaurus Zanabazar Saurornithoides Linhevenator Troodon Harenadraco is known from the Hermiin Tsav locality of the Baruungoyot Formation.

Based on stratigraphy and fossil content, the formation is consistently regarded as Late Cretaceous (possibly Upper Campanian) in age, although radiometric dates have not been determined.

Maniraptoran theropods are especially common, including dromaeosaurids (Hulsanpes, Kuru, Natovenator, and Shri),[6][7][8] oviraptorids (Conchoraptor, Heyuannia and Nemegtomaia),[9] alvarezsaurids (Ceratonykus, Jaculinykus, Khulsanurus, Ondogurvel, and Parvicursor),[10] and birds (Gobipipus, Gobipteryx and Hollanda).

[2] Several non-theropod dinosaurs are also present, including the titanosaurian sauropod (Quaesitosaurus),[13] ankylosaurids (Saichania, Tarchia and Zaraapelta),[14] protoceratopsids (Bagaceratops and Breviceratops),[15] and a pachycephalosaurid (Tylocephale).