Читать книгу Hadrosaurs - David A. Eberth - Страница 68

During much of the nineteenth and twentieth centuries, Europe boasted the richest fossil record of basal (i.e., non-hadrosaurid) iguanodontian dinosaurs in the world (Buffetaut and Le Loeuff, 1991; Weishampel et al., 2003; Norman, 2010, 2011a, this volume; Barrett et al., 2011). However, recent discoveries have revealed an abundance of new taxa from Asia, particularly China; recently named taxa include Nanyangosaurus zhugeii (Xu et al., 2000), Jinzhousaurus yangi (Wang and Xu, 2001; Barrett et al., 2009; Wang et al., 2010), Shuangmiaosaurus gilmorei (You, Ji, et al., 2003), Equijubus normani (You, Luo, et al., 2003), Lanzhousaurus magnidens (You et al., 2005), Penelopognathus weishampeli (Godefroit et al., 2005), Jintasaurus meniscus (You and Li, 2009), Bolong yixianensis (Wu et al., 2010), and Xuwulong yueluni (You et al., 2011). Although it is represented by one of the most complete skeletons known for these taxa, Equijubus has received only a brief description (You, Luo, et al., 2003).

We present herein a complete osteological description of the holotype and only known specimen of Equijubus, including elements that were not described or figured in the original description, and we provide a revised diagnosis for the taxon. The additional information presented on Equijubus in this description will facilitate comparison with other basal iguanodonts and allow its phylogenetic affinities to be more adequately tested. As is evident from the long list of taxa above, new Chinese iguanodonts are being discovered at a rapid pace, and it is essential when diagnosing new taxa that full comparisons with other iguanodonts are possible. Detailed descriptions of existing Chinese taxa, such as Equijubus and Jinzhousaurus (Barrett et al., 2009; Wang et al., 2010), will aid such comparative study.

Institutional Abbreviations AMNH, American Museum of Natural History, New York; CEUM, College of Eastern Utah Prehistoric Museum, Price, Utah; CM, Carnegie Museum of Natural History, Pittsburgh, Pennsylvania; IVPP, Institute of Vertebrate Paleontology and Paleoanthropology, Beijing, China; MB, Museum für Naturkunde, Berlin, Germany; MNHN, Muséum national d’Histoire naturelle, Paris, France; NHMUK, Natural History Museum, London, U.K.; SDSM, South Dakota School of Mines and Technology, Rapid City, South Dakota; USNM, National Museum of Natural History, Smithsonian Institution, Washington, D.C.