Topic
Spinophorosaurus
About: Spinophorosaurus is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 35 citations.
Papers
TL;DR: The braincase of a new sauropod, named Nebulasaurus taito gen. et al. as discussed by the authors, is known from the Middle Jurassic of China, but the braincase is distinct.
Abstract: Many sauropod ghost lineages cross the Middle Jurassic, indicating a time interval that requires increased sampling. A wide taxonomic spectrum of sauropodomorphs is known from the Middle Jurassic of China, but the braincase of a new sauropod, named here Nebulasaurus taito gen. et sp. nov., is distinct. Nebulasaurus is sister taxon to Spinophorosaurus from the Middle Jurassic of Africa and represents a clade of basal eusauropods previously unknown from Asia. The revised faunal list indicates dramatic transitions in sauropodomorph faunas from the Jurassic to Cretaceous of Asia; these are consistent with geographic isolation of Asia through the Late Jurassic. Non-sauropod sauropodomorphs, non-mamenchisaurid eusauropods (including basal macronarians), and mamenchisaurids successively replaced previous grades through the Jurassic, and titanosauriforms excluded all other sauropod lineages across the Jurassic—Cretaceous boundary.
28 citations
TL;DR: Four isolated theropod teeth from the ?Bathonian “Argiles de l'Irhazer” in Niger are described and it is suggested that three teeth share affinities with those of Megalosauridae and Allosauridae, belonging most likely to the former and the fourth tooth might be from a member of the stem group Spinosauridae.
Abstract: Four isolated theropod teeth from the ?Bathonian “Argiles de l'Irhazer” in Niger are described. The teeth were found in association with the holotype of the basal sauropod Spinophorosaurus nigerensis. These specimens have been assigned to two different taxa by independent analyses, such as direct comparison with teeth previously described in the literature, discriminant and morphometric analyses from metric characters, and cladistic and cluster analyses from discrete characters. The results suggest that three teeth share affinities with those of Megalosauridae and Allosauridae, belonging most likely to the former. The fourth tooth might be from a member of the stem group Spinosauridae. If so, this would be the oldest representative of this clade. This tooth shows a combination of characters that are unusual in typical spinosaurid teeth (crown moderately compressed labiolingually and curved distally with minute denticles on the carina and a deeply veined enamel surface texture without apicobasal ridges). T...
25 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2015 | 1 |
| 2013 | 1 |