Un nouveau genre de dinosaure sauropode de la formation des Grès supérieurs (Aptien-Albien) du Laos

Allain, Ronan; Taquet, Philippe; Battail, Bernard; Dejax, Jean; Richir, Philippe; Véran, Monette; Limon-Duparcmeur, Franck; Vacant, Renaud; Mateus, Octávio; Sayarath, Phouvong; Khenthavong, Bounxou; Phouyavong, Sitha

doi:10.1016/s1251-8050(00)87218-3

Cited by 22 publications

(25 citation statements)

References 6 publications

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“…Tangvayosaurus and Phuwiangosaurus are sister taxa within derived Euhelopodidae, in contrast to various studies that have suggested that these taxa are basal titanosaurs (Allain et al ., 1999; Upchurch et al ., 2004; Canudo et al ., 2008; Carballido et al ., 2011a). Ten and three steps are required to place Phuwiangosaurus and Tangvayosaurus within the Titanosauria, respectively.…”

Section: Robustness Of Resultscontrasting

confidence: 69%

“…(2004) presented the first cladistic support for Brachiosauridae, uniting the Early Cretaceous North American Cedarosaurus with Brachiosaurus (including Giraffatitan in the scorings for the latter). The purported Brachiosaurus ‐like Middle Jurassic sauropod Atlasaurus (Allain et al ., 1999) was found to be a non‐titanosauriform neosauropod closely allied with Jobaria (Sereno et al ., 1999). Tehuelchesaurus was found to be a non‐neosauropod closely related to Omeisaurus following the original description of the former taxon (Rich et al ., 1999).…”

Section: Previous Cladistic Analysesmentioning

confidence: 99%

“…Jobaria was originally thought to be Early Cretaceous in age (Sereno et al ., 1999), but may be older, perhaps Middle Jurassic (Rauhut & Lopez‐Arbarello, 2009). Omeisaurus is Middle Jurassic in age (Tang et al ., 2001), pre‐dating any of the taxa in the ingroup with the exception of Atlasaurus imelaki (Allain et al ., 1999).…”

Section: Cladistic Analysis Of Lower‐level Relationships Of Basal Titmentioning

confidence: 99%

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The early evolution of titanosauriform sauropod dinosaurs

D’Emic

2012

Zoological Journal of the Linnean Society

212

478

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Titanosauriformes was a globally distributed, long‐lived clade of dinosaurs that contains both the largest and smallest known sauropods. These common and diverse megaherbivores evolved a suite of cranial and locomotory specializations perhaps related to their near‐ubiquity in Mesozoic ecosystems. In an effort to understand the phylogenetic relationships of their early (Late Jurassic–Early Cretaceous) members, this paper presents a lower‐level cladistic analysis of basal titanosauriforms in which 25 ingroup and three outgroup taxa were scored for 119 characters. Analysis of these characters resulted in the recovery of three main clades: Brachiosauridae, a cosmopolitan mix of Late Jurassic and Early Cretaceous sauropods, Euhelopodidae, a clade of mid‐Cretaceous East Asian sauropods, and Titanosauria, a large Cretaceous clade made up of mostly Gondwanan genera. Several putative brachiosaurids were instead found to represent non‐titanosauriforms or more derived taxa, and no support for a Laurasia‐wide clade of titanosauriforms was found. This analysis establishes robust synapomorphies for many titanosauriform subclades. A re‐evaluation of the phylogenetic affinities of fragmentary taxa based on these synapomorphies found no body fossil evidence for titanosaurs before the middle Cretaceous (Aptian), in contrast to previous reports of Middle and Late Jurassic forms. Purported titanosaur track‐ways from the Middle Jurassic either indicate a substantial ghost lineage for the group or – more likely – represent non‐titanosaurs. Titanosauriform palaeobiogeographical history is the result of several factors including differential extinction and dispersal. This study provides a foundation for future study of basal titanosauriform phylogeny and the origins of Titanosauria. © 2012 The Linnean Society of London, Zoological Journal of the Linnean Society, 2012, 166, 624–671.

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Section: Robustness Of Resultscontrasting

confidence: 69%

Section: Previous Cladistic Analysesmentioning

confidence: 99%

Section: Cladistic Analysis Of Lower‐level Relationships Of Basal Titmentioning

confidence: 99%

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The early evolution of titanosauriform sauropod dinosaurs

D’Emic

2012

Zoological Journal of the Linnean Society

212

478

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“…5b), in the position and development of the lateral bulge, but differs in having a less defined articular head. The titanosauriform Tangvayosaurus hoffeti from the Aptian-Albian of Laos (Allain et al, 1999) has a more massive femur whose fibular condyle is located more medially than in the Moroccan sauropod. The femur of Tangvayosaurus is similar in some respects to that of Phuwiangosaurus from the Early Cretaceous of Thailand (Fig.…”

Section: Discussionmentioning

confidence: 99%

The first record of a sauropod dinosaur from the Late Cretaceous phosphates of Morocco

Suberbiola

Bardet

Iarochène

et al. 2004

Journal of African Earth Sciences

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“…Hoffet's major finds took place a few years later, when he discovered fairly abundant Cretaceous dinosaur remains near Muong Phalane, in southern Laos (Hoffet 1936(Hoffet , 1942(Hoffet , 1944; see also Buffetaut 1991). After Hoffet was killed by the Japanese in 1945, war conditions prevailed for decades in Laos, and it was not until the 1990s that a French-Lao group could resume research at Muong Phalane (Allain et al 1999). The vertebrate-bearing red beds ('Grès supérieurs') of southern Laos are now considered a lateral equivalent of the Aptian Khok Kruat Formation of Thailand (Buffetaut 1991).…”

mentioning

confidence: 99%