[D] Acanthopholis [sG]
Cretaceous Early Cretaceous Late Aptian Albian Cenomanian
Ornithischia Thyreophora Eurypoda Ankylosauria Nodosauridae
Acanthopholis = Syngonosaurus (Seeley, 1879 ), Eucerosaurus (Seeley, 1879 ) Acanthopholis > A.horridus (Huxley, 1867) >> A.macrocerus (Seeley, 1869 partim) A. platypus (Seeley, 1869 partim) A.stereocercus (Seeley, 1869 partim)
Assignment of Acanthopholis horridus to the Nodosauridae is based primarily on tooth structure and presence of tall conical spines and keeled plates that are or slightly convex medially.
Acanthopholis horridus is based on remains that may or may not pertain to a single individual/species. There is a lot of referred material that does not obviously belong to this taxon. It is certainly nodosaur, unlike the taxa discussed below, which though probably nodosaur, show no synapomorphies of that group.
Acanthopholis/Syngonosaurus macrocercus contains both ankylosaur scutes and ornithopod vertebrae, as well as material that can only be termed Dinosauria indet. and some that is lost.
Acanthopholis platypus  is based on a sauropod metatarsus Acanthopholis platypus  and ankylosaur caudal centra and a phalanx.
Acanthopholis stereocercus  includes ornithopod dorsal vertebrae and ankylosaur Acanthopholis stereocercus  caudal vertebrae and dermal spine.
Acanthopholis \\\"hughesii\\\" [Nomen Nudum] (Pereda-Suberbiola & Barrett, 1998) (SMC B55463-55490) six dorsals, seven caudals, transverse process, four metapodials, three phalanges, seven dermal plates All are ankylosaur except some of the metapodials (Dinosauria indet.) and some dorsal vertebrae (Ornithopoda indet.).
Acanthopholis \\\"keepingi\\\" [Nomen Nudum] (Pereda-Suberbiola & Barrett, 1998) (SMC B55491-55526) five dorsals, six caudals, three transverse processes, rib, two chevrons, metatarsal, two phalanges, fragmentary ilium(?), thirteen dermal plates, two undetermined bones All are ankylosaur except some dorsal and caudal vertebrae (Ornithopoda indet.), a limb fragment (turtle) and the chevrons, rib, metatarsal and phalanges (Dinosauria indet.).
Acanthopholis eucercus (Seeley,1869) Doubtful Ankylosaurian based on 6 caudal vertebrae (not 2 as many modern books indicate) This is possible not even Ankylosaurian, it may by Iguanodontid.Holotype: SMC 55551; SMC 55552; SMC 55553; SMC 55554; SMC 55555; SMC 55556 all caudal vertebra.