Late Triassic Vertebrates from Syren (Luxembourg)

Godefroit, Pascal; Cuny, Gilles; Delsate, Dominique; Roche, Michael B.

doi:10.1127/njgpa/210/1998/305

Cited by 30 publications

(21 citation statements)

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“…Prior to 2005 it was appreciated that Triassic ornithischians were scarce in the fossil record – nearly all ornithischian occurrences were based upon isolated teeth, with eight putative ornithischian genera ( Revueltosaurus , Krzyzanowskisaurus , Galtonia , Pekinosaurus , Tecovasaurus , Crosbysaurus , Protecovasaurus , Lucianosaurus ) named on the basis of isolated, but distinctive, teeth from the Late Triassic of North America (Hunt, 1989; Padian, 1990; Hunt & Lucas, 1994; Heckert, 2002, 2004, 2005) and similar teeth described from Europe and North Africa (e.g. Tatarinov, 1985; Galton, 1986; Godefroit & Cuny, 1997; Godefroit et al. , 1998; Cuny et al.…”

Section: Discussionmentioning

confidence: 99%

The anatomy of the basal ornithischian dinosaur Eocursor parvus from the lower Elliot Formation (Late Triassic) of South Africa

Butler¹

2010

Zoological Journal of the Linnean Society

100

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Ornithischia is a morphologically and taxonomically diverse clade of dinosaurs that originated during the Late Triassic and were the dominant large-bodied herbivores in many Cretaceous ecosystems. The early evolution of ornithischian dinosaurs is poorly understood, as a result in part of a paucity of fossil specimens, particularly during the Triassic. The most complete Triassic ornithischian dinosaur yet discovered is Eocursor parvus from the lower Elliot Formation (Late Triassic: Norian-Rhaetian) of Free State, South Africa, represented by a partial skull and relatively complete postcranial skeleton. Here, the anatomy of Eocursor is described in detail for the first time, and detailed comparisons are provided to other basal ornithischian taxa. Eocursor is a small-bodied taxon (approximately 1 m in length) that possesses a plesiomorphic dentition consisting of unworn leaf-shaped crowns, a proportionally large manus with similarities to heterodontosaurids, a pelvis that contains an intriguing mix of plesiomorphic and derived character states, and elongate distal hindlimbs suggesting well-developed cursorial ability. The ontogenetic status of the holotype material is uncertain. Eocursor may represent the sister taxon to Genasauria, the clade that includes most of ornithischian diversity, although this phylogenetic position is partially dependent upon the uncertain phylogenetic position of the enigmatic and controversial clade Heterodontosauridae.

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Section: Discussionmentioning

confidence: 99%

The anatomy of the basal ornithischian dinosaur Eocursor parvus from the lower Elliot Formation (Late Triassic) of South Africa

Butler¹

2010

Zoological Journal of the Linnean Society

100

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“…Fraser, Walkden & Stewart (1985) claimed the first pre-Rhaetic therian mammal, Kuehneotherium, from the Emborough fissure, but Whiteside & Marshall (1985) suggested that the Kuehneotherium should be used to date the fissure rather than vice versa. For example, a Kuehneotheriid has been found in the Rhaetian beds of Luxembourg (Godefroit et al 1998) and another possible occurrence in the Rhaetian of Boisset is noted by Cuny (1995). To show that the Emborough deposit is 'pre-Rhaetic', the basal Rhaetic would have to actually cap the fissure.…”

Section: Dating Of Other Sauropsid Fissures In Localities Around Brismentioning

confidence: 97%

The age, fauna and palaeoenvironment of the Late Triassic fissure deposits of Tytherington, South Gloucestershire, UK

Whiteside

Marshall

2007

Geol. Mag.

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Important vertebrate faunas occur in fissure deposits of Late Triassic-Jurassic age in SW Britain. Although the faunas are well described, their age and palaeoenvironment remain poorly understood. One such fissure system was documented in detail during quarrying operations at Tytherington and has yielded in situ palynomorphs that add much information concerning its age and palaeoenvironment. Significantly, the Tytherington fauna is of the sauropsid type that has generally been dated as Norian or pre-Penarth Group transgression and was also regarded as representing a distinct upland fauna. The palynomorphs, which include a significant marine component, demonstrate that the Tytherington Triassic fissures are infilled with Late Triassic (Rhaetian) sediments that match specific levels in the Westbury Formation. In addition, many of the Tytherington solutional fissures probably formed during the Rhaetian and are consistent with a fluctuating saline to freshwater environment. There is no prima facie evidence of solutional formation and infilling of the reptilebearing deposits before the Rhaetian trangression. The fissure reptile fauna, which includes the early dinosaur Thecodontosaurus, inhabited a small fire-swept limestone island in the Rhaetian sea. The features of the herpetofauna are entirely consistent with this island model which has Quaternary analogues.

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“…Standard protocol for etched surfaces requires direct acid-etching of the enameloid surface, without embedding or sectioning them. This is usually performed on the crown surface with different durations of acid ex-posure to penetrate the enameloid layer to variable depths (Reif, 1973(Reif, , 1977(Reif, , 1978(Reif, , 1979Duffin, 1980;Duffin & Ward, 1993;Cuny, 1998;Godefroit et al, 1998;Cuny & Benton, 1999;Cuny et al, 2001;Guinot & Cappetta, 2011). Thus, surface etchings provide information on the distribution of enameloid structures over the whole crown, at a given depth within the enameloid cap.…”

Section: Etched Surfacesmentioning

confidence: 99%