New information on Cretaceous troodontids (Dinosauria, Theropoda) from the People's Republic of China

2001 ◽  
Vol 38 (12) ◽  
pp. 1753-1766 ◽  
Author(s):  
Philip J Currie ◽  
Dong Zhiming

Troodontid specimens were recovered from three localities in China by the Sino-Canadian expeditions between 1987 and 1990. These include a Lower Cretaceous form (Sinornithoides youngi), which is the most complete troodontid skeleton ever found, isolated bones from the Iren Dabasu Formation (?Turonian), and partial skeletons of Saurornithoides mongoliensis from Djadokhta-equivalent beds (?Campanian). These, and other specimens recently described from North America, allow a better assessment of the phylogenetic position of troodontids than has been possible before. Although troodontids have autapomorphies that eliminate them from consideration as bird ancestors, they are nevertheless one of the closest avian outgroups within the Theropoda.

2020 ◽  
Vol 79 (3) ◽  
pp. 685-706
Author(s):  
Leigh K. Jenco ◽  
Jonathan Chappell

Many historians of China, particularly those based in North America, insist that the Qing dynasty's territorial expansion was imperial and comparable to the imperial expansions of other global empires. Other historians, particularly but not only those based in the People's Republic of China, continue to resist this interpretation. They argue that dynastic expansion in the Ming and Qing periods was simply a form of nation-state building, akin to similar processes in Europe. Rather than rejecting their claims as a product of Chinese nationalism, we argue that the term “empire” should be (re)understood as a global co-production, emerging from multiple intersecting histories and scholarly debates about those histories. Doing so challenges influential definitions of empire that rely on a distinction between empires and nation-states, highlighting their dual presence in both Euro-American and Chinese pasts (and presents). This move demands a rejection of periodizations that suggest that empires ceased to exist following the period of decolonization from 1945 to the 1970s. This opens up new avenues of historical and normative inquiry to acknowledge the modern continuity between empires and nation-states.


1993 ◽  
Vol 30 (10) ◽  
pp. 2174-2176 ◽  
Author(s):  
Zhi-Ming Dong

In 1988, an incomplete skeleton of a stegosaurian dinosaur was found in Lower Cretaceous strata of the Ordos Basin of China by the Dinosaur Project (China – Canada – Alberta – Ex Terra). The material includes an articulated series of vertebrae from the last three cervicals to the first five caudals, and the right ilium. The specimen is identified as a new species called Wuerhosaurus ordosensis. It is the only Lower Cretaceous stegosaur known with an articulated series of dorsal vertebrae, which have been reduced to eleven in number.


1993 ◽  
Vol 30 (10) ◽  
pp. 2177-2179 ◽  
Author(s):  
Zhi-Ming Dong

The discovery of an Early Cretaceous bird from the Ordos Basin of Inner Mongolia (People's Republic of China) is reported. The specimen, collected by the Dinosaur Project (China – Canada – Alberta – Ex Terra) Expedition of 1990, includes scapulocoracoids, humeri, radii, ulnae and metacarpals. It is referred to the Enantiornithes.


10.1671/a1088 ◽  
2003 ◽  
Vol 23 (3) ◽  
pp. 695-698 ◽  
Author(s):  
Michael D. Shapiro ◽  
Hailu You ◽  
Neil H. Shubin ◽  
Zhexi Luo ◽  
Jason Philip Downs

2006 ◽  
Vol 43 (5) ◽  
pp. 547-554 ◽  
Author(s):  
Jerald D Harris ◽  
Matthew C Lamanna ◽  
Hai-lu You ◽  
Shu-an Ji ◽  
Qiang Ji

A new specimen of an enantiornithean bird from the Lower Cretaceous Xiagou Formation of Gansu Province, northwestern China, consists of an articulated distal left humerus, ulna, radius, carpus, and manus. The specimen may represent a primitive enantiornithean because it lacks a longitudinal sulcus on the radius, has incompletely fused alular and major metacarpals, and possibly retains a remnant of a second phalanx on the minor digit. It differs from all other known enantiornitheans, and exhibits possible autapomorphies, including peculiar, flat humeral epicondyles, a pair of eminences on the distal minor metacarpal, and an enormous flexor tuberculum on the alular ungual. The specimen probably pertains to the same taxon as a previously described enantiornithean arm from Changma; the incompleteness of the taxon precludes erecting a new name, but it provides new information concerning enantiornithean diversity in the Early Cretaceous of central Asia.


2003 ◽  
Vol 135 (6) ◽  
pp. 879-881 ◽  
Author(s):  
David Hunt ◽  
Robert Foottit ◽  
Dana Gagnier ◽  
Tracey Baute

The soybean aphid, Aphis glycines Matsamura (Hemiptera: Aphididae), is a pest of soybeans in the People's Republic of China, Korea, Thailand, Japan, North Borneo, Malaya, and the Philippines (Blackman and Eastop 2000). It was first identified in North America in 2000 from soybean fields in 10 states in the north-central United States of America, although the route of entry and time of introduction are not known (North Central Regional Pest Alert 2001). Dai and Fan (1991) reported that yield losses caused by soybean aphids on soybeans in the People's Republic of China were greater when the crop was infested soon after planting, and the presence of large populations of the aphid throughout the growing season resulted in 20%–30% yield losses. The soybean aphid can also transmit several viruses that infect soybeans in North America, including alfalfa mosaic, soybean mosaic, bean yellow mosaic, peanut mottle, peanut stunt, and peanut stripe (Hartman et al. 2001). In North America, the soybean aphid is known to transmit soybean mosaic virus and alfalfa mosiac virus (Hill et al. 2001). A survey of Ontario soybean fields revealed the presence of tobacco ring spot virus, soybean mosiac virus, and bean pod mottle virus (Michelutti et al. 2001); all of which could potentially be spread by this newly introduced aphid.


1996 ◽  
Vol 33 (4) ◽  
pp. 599-605 ◽  
Author(s):  
X.-C. Wu ◽  
H.-D. Sues ◽  
D. B. Brinkman

Cranial and postcranial remains from the Laolonghuoze locality in the Ordos Basin, Inner Mongolia (China), represent a previously unrecorded taxon of crocodyliform archosaurs from the Lower Cretaceous Luohandong Formation (Zhidan Group). Several cranial features indicate that this form is referable to the Atoposauridae, which were previously definitely known only from the Upper Jurassic and Lower Cretaceous of Europe. Certain derived characters further indicate that the Ordos material is closely related to, if not actually referable to, Theriosuchus. The Ordos atoposaurid differs from the species of Theriosuchus in only a few features. In view of its fragmentary nature, the new material is identified as cf. Theriosuchus sp. at present.


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