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Barilium dawsoni

Reptilia - Iguanodontidae

Taxonomy
Iguanodon dawsoni was named by Lydekker (1888). Its type specimen is BMNH R798, R802 and is a 3D body fossil. Its type locality is Shornden Quarry (clay), which is in a Valanginian terrestrial claystone in the Wadhurst Clay Formation of the United Kingdom. It is the type species of Barilium.

It was recombined as Torilion dawsoni by Carpenter and Ishida (2010); it was considered a nomen dubium by Paul (2008); it was recombined as Barilium dawsoni by Norman (2010), Pereda Suberbiola et al. (2010), McDonald et al. (2010), McDonald et al. (2010), Pereda-Suberbiola et al. (2011), McDonald (2012), McDonald et al. (2012), Norman (2013), Zheng et al. (2013), Pereda Suberbiola and Ruiz-Omeñaca (2013), Norman (2014), Ibiricu et al. (2019), Párraga and Prieto-Márquez (2019), Santos-Cubedo et al. (2021), Verdú et al. (2021), Rotatori et al. (2022), Ji and Zhang (2022) and Bonsor et al. (2023).

Synonyms
Synonymy list
YearName and author
1888Iguanodon dawsoni Lydekker p. 51 figs. 1-2
1889Iguanodon dawsoni Lydekker p. 48
1889Iguanodon dawsoni Newton p. 260
1890Iguanodon dawsoni Lydekker pp. 36-38
1890Iguanodon dawsoni Woodward and Sherborn p. 243
1890Iguanodon dawsoni Zittel p. 762
1896Iguanodon dawsoni Mansel-Pleydell p. 119
1901Iguanodon dawsoni Nopcsa p. 211
1902Iguanodon dawsoni Mansel-Pleydell p. lxxxiii
1902Iguanodon dawsoni Nopcsa p. 151
1936Iguanodon dawsoni Swinton p. 215
1960Iguanodon dawsoni Delair p. 86
1964Iguanodon dawsoni Kuhn p. 11
1981Iguanodon dawsoni Bartholomai and Molnar p. 343
1983Iguanodon dawsoni Blows p. 312
1987Iguanodon dawsoni Norman p. 164
1990Iguanodon dawsoni Norman and Weishampel p. 530
1992Iguanodon dawsoni Cheevely and Chapman p. 349
1992Iguanodon dawsoni Martin and Buffetaut p. 68
1997Iguanodon dawsoni Norman p. 784
1998Iguanodon dawsoni Blows p. 31
1998Iguanodon dawsoni Ruiz-Omeñaca et al. p. 275
2004Iguanodon dawsoni Norman p. 416
2008Iguanodon dawsoni Luque et al. p. 80
2009Iguanodon dawsoni Galton p. 245
2010Sellacoxa pauli Carpenter and Ishida p. 155 fig. 6
2010Torilion dawsoni Carpenter and Ishida p. 156
2010Barilium dawsoni McDonald et al. p. 2
2010Kukufeldia tilgatensis McDonald et al. pp. 4-5 figs. 1-4
2010Barilium dawsoni McDonald et al. p. 32
2010Kukufeldia tilgatensis McDonald et al. p. 32
2010Barilium dawsoni Norman pp. 50-52 figs. 3-4
2010Barilium dawsoni Pereda Suberbiola et al. p. 64
2011Barilium dawsoni Pereda-Suberbiola et al. p. 556
2012Barilium dawsoni McDonald p. 2
2012Kukufeldia tilgatensis McDonald p. 2
2012Barilium dawsoni McDonald et al. p. 61
2012Kukufeldia tilgatensis McDonald et al. p. 61
2013Barilium dawsoni Norman p. 391
2013Barilium dawsoni Pereda Suberbiola and Ruiz-Omeñaca p. 14
2013Barilium dawsoni Zheng et al.
2013Kukufeldia tilgatensis Zheng et al.
2014Barilium dawsoni Norman p. 12
2016Kukufeldia tilgatensis Fuentes Vidarte et al. p. 436
2019Barilium dawsoni Ibiricu et al. p. 281
2019Barilium dawsoni Párraga and Prieto-Márquez p. 254
2021Barilium dawsoni Santos-Cubedo et al. p. 8
2021Barilium dawsoni Verdú et al. p. 9
2022Barilium dawsoni Ji and Zhang p. 6
2022Barilium dawsoni Rotatori et al. p. 132
2023Barilium dawsoni Bonsor et al. p. 1

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
RankNameAuthor
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Cerapoda
Ornithopoda()
Clypeodonta
Iguanodontia()
Dryomorpha
Ankylopollexia
Neoiguanodontia
familyIguanodontidae
genusBarilium
speciesdawsoni()

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.

Barilium dawsoni Lydekker 1888
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Invalid names: Kukufeldia tilgatensis McDonald et al. 2010 [synonym], Sellacoxa pauli Carpenter and Ishida 2010 [synonym]
Diagnosis
ReferenceDiagnosis
D. B. Norman 2010Iguanodontian with the following unique character combination (* indicates autapomorphies - all other characters are apomorphic within basal iguanodontians even if they occur sporadically within ornithopods more generally), summarised by element:
Ilium (Fig. 3): preacetabular process (prp) with a prominent medial flange that arises from a large sacrodorsal rib/transverse process facet near the base of the process; rim of the sacrodorsal rib facet (srf) is visible, in lateral view, in the upper part of the recess between the preacetabular process and the pubic peduncle (pp)*;lateral surface of the preacetabular process twists axially to face dorsally toward its anterior end*; the principal body of the iliac blade is flat and stands vertically (Fig. 3B); in profile the entire dorsal margin of the iliac blade is gently convex; the dorsal edge of the acetabular blade is flattened and transversely thick* (Fig. 3B); a minor indent occurs along the posterodorsal margin of the postacetabular blade, shows no accompanying lateral expansion of the blade; postacetabular portion of the iliac blade is bluntly truncated and its lower half curves gently medially; very restricted brevis shelf (fossa) that is not bounded by a prominent lateral ridge*; the ventral border of the postacetabular blade lies horizontally and at the same level as the ischial peduncle (ip)*; the medial surface of the ilium is prominently scarred across its ventral half where it anchors the sacral yoke but, uniquely, bears yoke scars low down along the ventral margin of the postacetabular blade* (Fig. 3C, srs); acetabulum is extremely large, forming a exceptionally broad, laterally-oriented, cup-shaped depression*.
Vertebrae (Fig. 4A, B): posterior dorsal vertebrae have spool-shaped, cylindrical centra with thin everted articular margins and transversely rounded haemal surfaces*; proximal caudal vertebrae (Fig. 4C, D) have broad, dorsoventrally compressed centra* (subrectangular in anterior view: Fig. 4D); distal caudal centra are deeply amphicoelous*.
K. Carpenter and Y. Ishida 2010Ilium deep, slight development of the lateral iliac crest, broad medial shelf on preacetabular process, postacetabular portion long, deep and rounded distally, narrow brevis shelf, shallow postacetabular notch distally located on postacetabular process.
A. T. McDonald et al. 2010 (Kukufeldia tilgatensis)Iguanodontian distinguished by a single autapomorphy: row of four foramina extending dorsolaterally from the ventral surface of the symphyseal region to the lateral surface of the dentary and meeting another row of foramina ventral to the predentary groove. Also diagnosed by the following unique combination of features: tooth alveoli shaped by dentary teeth; vertical, rostrally expanded coronoid process; straight rostral ramus of dentary.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:40:05
Modified: 2009-01-03 22:40:05
Source: subo = suborder, o = order
References: Benton 1983, Marsh 1875

Age range: base of the Late/Upper Valanginian to the top of the Early/Lower Barremian or 140.20000 to 125.45000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Valanginian140.2 - 136.4United Kingdom (England) Iguanodon mantelli (52577)
Late/Upper Valanginian140.2 - 136.4United Kingdom (England) Iguanodon dawsoni (type locality: 52255) Iguanodon sp. (105792)
Late/Upper Hauterivian - Early/Lower Barremian136.4 - 125.45United Kingdom (England) Iguanodon dawsoni (52669)