Читать книгу Hadrosaurs - David A. Eberth - Страница 81

Recent years have seen a surge of new basal hadrosauroid dinosaurs (the most inclusive taxon containing Parasaurolophus walkeri Parks, 1922, but not Iguanodon bernissartensis Boulenger [in Beneden, 1881]) in China. Among them, three genera (Equijubus normani You et al., 2003, Jintasaurus meniscus You and Li, 2009, and Xuwulong yueluni You et al., 2011) and one species (Probactrosaurus mazongshanensis Lü, 1997) were named based on material from the Early Cretaceous Xinminpu Group in the Mazongshan (also called Beishan) area of Gansu Province, northwestern China (Fig. 4.1), making it one of the richest hadrosauroid-yielding areas in the world. However, the assignment of the “mazongshanensis” species to “Probactrosaurus” has been questioned, and this taxon probably represents a new genus (Norman, 2002, 2004; Carpenter and Ishida, 2010; McDonald et al., 2010; Buffetaut and Suteethorn, 2011).

In this chapter, based on a review of previous comments on the status of Probactrosaurus mazongshanensis Lü, 1997 and new comparisons to its related taxa, a new generic name Gongpoquansaurus is proposed for “Probactrosaurus” mazongshanensis mainly based on its unique cranial features.

4.1. Localities of basal hadrosauriform dinosaurs from the Early Cretaceous Zhonggou Formation (Xinminpu Group) in the Mazongshan area of Gansu Province, northwestern China. (1) locality of Gongpoquansaurus mazongshanensis (Lü, 1997) comb. nov. and Equijubus normani You et al., 2003 in the Gongpoquan Basin; (2) locality of Jintasaurus meniscus You and Li, 2009, and Xuwulong yueluni You et al., 2011, in the Yujingzi Basin.

Institutional Abbreviations IVPP, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China.