Kingdom Animalia Clade Dinosauria Phylum Chordata Order Ornithischia | Class Reptilia Suborder †Ornithopoda Rank Species | |
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Genus †Gideonmantellia
Ruiz-Omeñaca et al., 2012 Similar Delapparentia, Camarillasaurus, Galvesaurus, Barilium, Ahshislepelta | ||
Gideonmantellia is an extinct genus of basal ornithopod dinosaur known from the Early Cretaceous (Barremian stage) of Galve, Province of Teruel, Spain. It contains a single species, Gideonmantellia amosanjuanae.
Contents
Discovery and namingEdit
In 1982, amateur palaeontologist José María Herrero Marzo together with his son Jesús uncovered in a loam pit near Galve, the Poyales Barranco Canales site, the remains of a small euornithopod. In 1987 from this material by José Luis Sanz a left femur and ilium were described, which he referred to Hypsilophodon foxii. In 1995 José Ignacio Ruiz-Omeñaca realised the find represented a separate taxon, after he had further prepared the bones in 1994 and 1995. Ruiz-Omeñaca continued his studies from 1996, as part of his thesis. In 2001 he published a more detailed and complete description, in 2004 reaffirming that a new species had been discovered. In 2006, in his doctoral thesis he named this Gideonmantellia amosanjuanae; as a nomen ex dissertatione this name was as yet invalid though.
In 2012, the type species Gideonmantellia amosanjuanae was validly named and redescribed by Ruiz-Omeñaca, José Ignacio Canudo, Gloria Cuenca-Bescós, Penélope Cruzado-Caballero, José Manuel Gasca and Miguel Moreno-Azanza. The generic name honours the first describer of Hypsilophodon, Gideon Mantell. The specific name honours the late palaeontologist Olga María Amo Sanjuán, who studied the Cretaceous Galve fauna.
The holotype, MPG-PBCH, was found in a fluvial deposit of the Camarillas Formation, dating from the early Barremian. It consists of a partial articulated skeleton, lacking the skull, of a juvenile individual, including thirty-three vertebrae of the back, hip and tail, twenty-one fragments of the neural arches, six chevrons, rib fragments, ossified tendons, the left pelvis and both hindlimbs. The specimen is part of the collection of the Museo Paleontológico de Galve and displayed in the palaeontological hall of the townhall of Galve.
PhylogenyEdit
The taxon was in 1995 and 2001 assigned to the Hypsilophodontidae. Today this is considered an unnatural paraphyletic group and Gideonmantellia was in 2012 placed in a basal position in the Ornithopoda. The cladogram below follows Ruiz-Omeñaca et al., 2012.