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Barilium dawsoni
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).
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
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Synonymy list
| Year | Name and author |
|---|---|
| 1888 | Iguanodon dawsoni Lydekker p. 51 figs. 1-2 |
| 1889 | Iguanodon dawsoni Lydekker p. 48 |
| 1889 | Iguanodon dawsoni Newton p. 260 |
| 1890 | Iguanodon dawsoni Lydekker pp. 36-38 |
| 1890 | Iguanodon dawsoni Woodward and Sherborn p. 243 |
| 1890 | Iguanodon dawsoni Zittel p. 762 |
| 1896 | Iguanodon dawsoni Mansel-Pleydell p. 119 |
| 1901 | Iguanodon dawsoni Nopcsa p. 211 |
| 1902 | Iguanodon dawsoni Mansel-Pleydell p. lxxxiii |
| 1902 | Iguanodon dawsoni Nopcsa p. 151 |
| 1936 | Iguanodon dawsoni Swinton p. 215 |
| 1960 | Iguanodon dawsoni Delair p. 86 |
| 1964 | Iguanodon dawsoni Kuhn p. 11 |
| 1981 | Iguanodon dawsoni Bartholomai and Molnar p. 343 |
| 1983 | Iguanodon dawsoni Blows p. 312 |
| 1987 | Iguanodon dawsoni Norman p. 164 |
| 1990 | Iguanodon dawsoni Norman and Weishampel p. 530 |
| 1992 | Iguanodon dawsoni Cheevely and Chapman p. 349 |
| 1992 | Iguanodon dawsoni Martin and Buffetaut p. 68 |
| 1997 | Iguanodon dawsoni Norman p. 784 |
| 1998 | Iguanodon dawsoni Blows p. 31 |
| 1998 | Iguanodon dawsoni Ruiz-Omeñaca et al. p. 275 |
| 2004 | Iguanodon dawsoni Norman p. 416 |
| 2008 | Iguanodon dawsoni Luque et al. p. 80 |
| 2009 | Iguanodon dawsoni Galton p. 245 |
| 2010 | Sellacoxa pauli Carpenter and Ishida p. 155 fig. 6 |
| 2010 | Torilion dawsoni Carpenter and Ishida p. 156 |
| 2010 | Barilium dawsoni McDonald et al. p. 2 |
| 2010 | Kukufeldia tilgatensis McDonald et al. pp. 4-5 figs. 1-4 |
| 2010 | Barilium dawsoni McDonald et al. p. 32 |
| 2010 | Kukufeldia tilgatensis McDonald et al. p. 32 |
| 2010 | Barilium dawsoni Norman pp. 50-52 figs. 3-4 |
| 2010 | Barilium dawsoni Pereda Suberbiola et al. p. 64 |
| 2011 | Barilium dawsoni Pereda-Suberbiola et al. p. 556 |
| 2012 | Barilium dawsoni McDonald p. 2 |
| 2012 | Kukufeldia tilgatensis McDonald p. 2 |
| 2012 | Barilium dawsoni McDonald et al. p. 61 |
| 2012 | Kukufeldia tilgatensis McDonald et al. p. 61 |
| 2013 | Barilium dawsoni Norman p. 391 |
| 2013 | Barilium dawsoni Pereda Suberbiola and Ruiz-Omeñaca p. 14 |
| 2013 | Barilium dawsoni Zheng et al. |
| 2013 | Kukufeldia tilgatensis Zheng et al. |
| 2014 | Barilium dawsoni Norman p. 12 |
| 2016 | Kukufeldia tilgatensis Fuentes Vidarte et al. p. 436 |
| 2019 | Barilium dawsoni Ibiricu et al. p. 281 |
| 2019 | Barilium dawsoni Párraga and Prieto-Márquez p. 254 |
| 2021 | Barilium dawsoni Santos-Cubedo et al. p. 8 |
| 2021 | Barilium dawsoni Verdú et al. p. 9 |
| 2022 | Barilium dawsoni Ji and Zhang p. 6 |
| 2022 | Barilium dawsoni Rotatori et al. p. 132 |
| 2023 | Barilium dawsoni Bonsor et al. p. 1 |
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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
| Reference | Diagnosis | |
|---|---|---|
| D. B. Norman 2010 | Iguanodontian 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 2010 | Ilium 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
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| Source: subo = suborder, o = order | |||||
| References: Marsh 1875, Benton 1983 | |||||
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 Valanginian | United Kingdom (England) | Iguanodon mantelli (52577) | |
| Late/Upper Valanginian | United Kingdom (England) | Iguanodon dawsoni (type locality: 52255) Iguanodon sp. (105792) | |
| Late/Upper Hauterivian - Early/Lower Barremian | United Kingdom (England) | Iguanodon dawsoni (52669) |