Lida Xing

Lida Xing
China University of Geosciences (Beijing) · School of Earth Sciences and Resources

L. Xing

About

292
Publications
79,148
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Introduction
My research interests are in the archosaur track, and the relationships among track and skeleton records in Asia and North America. Since 2014, I pay more attention to the Mid-Cretaceous vertebrate amber (avian/non-avian theropod) from Burma, and with emphasis on morphology, paleoecology and evolution.
Additional affiliations
September 2016 - September 2016
China University of Geosciences (Beijing)
Position
  • Lecturer

Publications

Publications (292)
Article
Full-text available
Background Dinosaur eggs containing embryos are rare, limiting our understanding of dinosaur development. Recently, a clutch of subspherical dinosaur eggs was discovered while blasting for a construction project in the Upper Cretaceous red beds (Hekou Formation) of the Ganzhou Basin, Jiangxi Province, China. At least two of the eggs contain identif...
Article
An increasing number of theropod-dominated tracksites have been reported from the Jurassic and Cretaceous of China. These include a significant number from the Lower Jurassic of the Lufeng Basin, famous for its Lufengosaurus fauna and known for a typical Lower Jurassic globally-distributed tetrapod footprint biochron. Here we report another localiz...
Article
An isolated but moderately well-preserved theropod track from the coal-bearing strata of the Zhangjiakou City region of Hebei Province was reported to have originated from the Xiahuayuan Formation, which is considered Middle Jurassic in age. Although the track has a wide divarication angle and length-width ratio reminiscent of Cretaceous tracks lik...
Article
Dinosaur tracks have been known and reported sporadically from the coal-bearing beds of the Fuxin Formation (upper Aptian–Albian, upper Lower Cretaceous) of Liaoning Province, northeastern China for some time but have not been described in detail. Here available material is illustrated suggesting a diversity of theropod track morphotypes, including...
Preprint
Background: Dinosaur eggs containing embryos are rare, limiting our understanding of dinosaur development. Recently, a clutch of subspherical dinosaur eggs was discovered while blasting for a construction project in the Upper Cretaceous red beds (Hekou Formation) of the Ganzhou basin, Jiangxi Province, China. At least two of the eggs contain identi...
Article
Monospecific assemblages of non-avian theropod tracks are relatively rare in the Cretaceous of Korea, where assemblages dominated by the tracks of diverse tetrapods (birds, sauropods, ornithopods, and pterosaurs) are well known and widely distributed in the Haman and Jindong formations (Hayang Group). To date, few high-density assemblages of therop...
Article
Two newly discovered dinosaur track locations near the town of Bijie in Guizhou Province, southwestern China are named the Yuanbaoqing and Yejiatian tracksites. They represent the Lower Jurassic Maanshan Member of the Zijiujing Formation and Upper Jurassic Xiashaximiao Formation, respectively. The former Yuanbaoqing tracksite reveals a minimum of t...
Article
The Jurassic and Cretaceous tetrapod track record in China has incrementally expanded due to the discovery of small sites in widely dispersed geographical locations, which often lack body fossils. Many of these are theropod dominated tracksites where, despite morphological variation, identification of ichnotaxa is difficult at low taxonomic levels...
Article
Full-text available
Despite the discovery of many dinosaur eggs and nests over the past 100 years, articulated in-ovo embryos are remarkably rare. Here we report an exceptionally preserved, articulated oviraptorid embryo inside an elongatoolithid egg, from the Late Cretaceous Hekou Formation of southern China. The head lies ventral to the body, with the feet on either...
Article
Full-text available
Amber fossils provide snapshots of the anatomy, biology, and ecology of extinct organisms that are otherwise inaccessible. The best-known fossils in amber are terrestrial arthropods—principally insects—whereas aquatic organisms are rarely represented. Here we present the first record of true crabs (Brachyura) in amber—from the Cretaceous of Myanmar...
Article
An assemblage of small, Middle Jurassic tracks from the Xishanyao Formation, located about 100 km west of Urumqi in the Junggar Basin, Xinjiang Province, is here designated the Nanshan site. The site reveals three ornithischian trackways identified as Anomoepus. These represent the eleventh report of the ichnogenus from the Jurassic of China. Two o...
Article
The Jurassic-Cretaceous Tuchengzi Formation has yielded at least 16 known theropod-dominated tracksites from northeast China, and in this paper, a new locality, the Lishi site in Hebei Province, is documented. A tuff layer positioned stratigraphically 90 m below the trackway layer yielded a UPb date of 142.2 ± 0.9 Ma, placing the site in the Berria...
Article
New umbellaoolithid and faveoloolithid eggs were discovered from the early Late Cretaceous deposit in the Xiuning Basin, Anhui Province, China, and the samples were examined for elemental and isotopic compositions to reconstruct the geochemical environment. The results show that the trace elements consist of Sr, Mn, Ti, Ba, As, La, Cr, Ni, Pb, Cu,...
Article
In recent years the number of track sites discovered and reported from the Lower Cretaceous Jiaguan Formation, Sichuan Basin has increased steadily. Here we report on the 20th and 21st sites which are situated in unusual locations in a cave and on a steep bedding plane surface in association with Tang Dynasty grottoes. The ichnofauna is represented...
Article
Previously known theropod dinosaur footprints preserved as natural casts in the Tuchengzi Formation, on a rock wall beside the railway in Nanshuangmiao Village, Shangbancheng Town, Chengde City, were originally assigned to ichnogenus Anchisauripus and tentatively attributed to oviraptosaurs. The assemblage was restudied in more detail by examining...
Article
The smallest non-avian theropods have often attracted attention of palaeobiological and ichnological research. Here, we describe a diminutive tridactyl track (10.2 mm in length) from the Lower Jurassic Ma’anshan Member of the Ziliujing Formation, Wuli site, Sichuan Province, China. The Wuli specimen may be the smallest theropod track in the world....
Article
An assemblage of eubrontid-type theropod tracks, representing terrestrial progression and turtle track swim tracks representing subaqueous progression characterises a newly reported site in the Middle Jurassic Zhiluo Formation in Shaanxi Province China. While eubrontid tracks are common in the Jurassic of China, turtle swim tracks have only compara...
Article
Many Mesozoic formations have yielded substantial dinosaur dominated ichnofaunas, which help characterize coeval communities. When compared with dinosaurian skeletal data (faunal lists) from the same and/or coeval deposits, the completeness and diversity of trace and body fossil records may be shown to be of equal or quite different value for paleo...
Article
Full-text available
Rich tetrapod ichnofaunas, known for more than a decade, from the Huangyangquan Reservoir (Wuerhe District, Karamay City, Xinjiang) have been an abundant source of some of the largest Lower Cretaceous track collections from China. They originate from inland lacustrine clastic exposures of the 581–877 m thick Tugulu Group, variously divided into fou...
Article
A single well-preserved theropod trackway identified as Eubrontes was discovered in the Lower Cretaceous (Berriasian-Valanginian) Cangxi Formation on the northern margin of the Sichuan Basin This is the first report of tracks from this formation. The occurrence is consistent with reports of theropod dominated ichnofaunas from broadly coeval deposit...
Article
A newly discovered saurischian dominated tracksite in the Lower Cretaceous Jiaguan Formation in southeastern Sichuan province reveals 13 sauropod trackway segments representing ichnogenus Brontopodus and three theropod trackways. This is a typical Type 1 Jiaguan Formation deposit dominated by tetrapod tracks with no significant tetrapod body fossil...
Article
Tracks from two sites in the Middle Jurassic Xintiangou Formation in the Wuma Village area, Wuhuang Township, Zizhong have been known and intermittently studied and excavated since the 1980s. The track-bearing surfaces were exposed by a combination of natural weathering and deliberate excavation by residents in a rural agricultural area. The surfac...
Article
A total of 31 Lower Cretaceous tetrapod tracksites have been reported from four areas in Gansu Province, China: Yanguoshia, Guanshan, Zhongpu and Honggu. Here we report on the previously undescribed track types found at seven of these sites, five of which are sauropod dominated, with one site yielding ornithopod tracks and another one yielding ther...
Article
Sauropod tracks, particularly those attributable to the ichnogenus Brontopodus are becoming increasingly well known in the Jurassic and Cretaceous of China. Globally there are indications that wide gauge forms, attributable to titanosauriform sauropods increase in the Cretaceous. However, differentiating wide and narrow gauge, broadly categorized a...
Article
Full-text available
The Zhaojue (ZJ) tracksites represent multiple steeply-inclined, track-bearing exposures in the clastic Feitianshan Formation of Sichuan Province that have been sequentially, excavated, mapped, expanded and destroyed, by quarrying, erosion or collapse, for almost three decades. The quarried area extends for more almost 1.0 km from north to south an...
Article
Dinosaur trackways that show changes in direction are reported from Jurassic and Cretaceous sites in North and South America, Europe and Asia. Such changes in direction can be defined as tortuosity, and categorised in 45° quadrants. To date only six tortuous theropod trackways have been reported with changes in direction exceeding ¼-¾ turns (~ 45°-...
Article
Multiple sauropod-track-bearing horizons occur in the Middle Jurassic Shaqiaomu Formation, in the Chaya Group of Eastern Tibet. These add to the report of a previously described sauropod trackway, which is a famous tourist attraction and became part of a folkloric legend. From an ichnological point of view, multiple track-bearing levels are consist...
Article
Here we report the discovery of a non-avian theropod manus claw and various closely associated caudal vertebrae from a Lower Cretaceous exposure of the Tugulu Group, in the Junggar Basin. The gross anatomy of the vertebrae indicate an ornithomimosaur affinity, and a morphometric analysis of the claw supports this diagnosis. As is consistent with th...
Article
Dinosaur and other tetrapod tracks are already known from multiple (~25) sites in the Early Cretaceous Hekou Group of Gansu Province. In addition to large sites (e.g. Yanguoxia) which have yielded more than 1500 tracks, small sites are important for verifying the distribution of morphotypes (ichnotaxa) over a wider region. Documentation of five new...
Article
A Late Jurassic ichnofauna from the Suining Formation at the Yejipo site, Huangba Village, Sichuan Province has been locally known for its fossil footprints since the 1980s as the name ‘Yejipo’, meaning feral chicken/pheasant indicates. The best-preserved trackway represents a large theropod (mean footprint length 55.0 cm) assigned to Megalosauripu...
Article
Full-text available
Poorly preserved tracks have limited ichnotaxonomic or biotaxon utility, but may reveal useful information about the paleoenvironment, behavior and track taphonomy. Eight mostly parallel to sub parallel trackway segments (T1–T8) were registered on a truncation surface in the Lower Cretaceous Luohe Formation of Shaanxi Province. These attest to the...
Article
Full-text available
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Article
Full-text available
The Society of Vertebrate Paleontology (SVP) has recently circulated a letter, dated 21st April, 2020, to more than 300 palaeontological journals, signed by the President, Vice President and a former President of the society (Rayfield et al. 2020). In this letter, significant changes to the common practices in palaeontology are requested. In our pr...
Article
Full-text available
The Society of Vertebrate Paleontology (SVP) has recently circulated a letter, dated 21st April, 2020, to more than 300 palaeontological journals, signed by the President, Vice President and a former President of the society (Rayfield et al. 2020). In this letter, significant changes to the common practices in palaeontology are requested. In our pr...
Article
Subaqueously-registered trackways of marine tetrapods are only rarely preserved; some of the best examples so far come from the Shizishan Member (Member II) of the Guanling Formation (Middle Triassic, Anisian-Ladinian) of Yunnan Province in southwestern China. The unit is well-known for the Luoping Biota including abundant skeletons of marine repti...
Article
Full-text available
Recently, the Society of Vertebrate Paleontology (SVP) has sent around a letter, dated 21st April, 2020 to more than 300 palaeontological journals, signed by the President, Vice President and a former President of the society (Rayfield et al. 2020). The signatories of this letter request significant changes to the common practices in palaeontology....
Article
Subaqueously-registered trackways of marine tetrapods are only rarely preserved; some of the best examples so far come from the Shizishan Member (Member II) of the Guanling Formation (Middle Triassic, Anisian-Ladinian) of Yunnan Province in southwestern China. The unit is well-known for the Luoping Biota including abundant skeletons of marine repti...
Article
Hkamti amber contains exquisite fossils, but the age of the amber biota is unclear. In this study, we documented the characteristics of fossils hosted in the amber, and we present zircon UPb ages of tuff layers from the Kachin and Hkamti sites (i.e., the “new mine”). We also present a compilation of arthropod and echinoderm syn-inclusions from the...
Article
Full-text available
Recent discoveries of enantiornithine birds trapped in amber have decreased the lower size limit of members of this clade, increased their morphological diversity, and provided significant new data regarding their plumage. Here, we describe a new specimen that consists of the distal extremities of both forelimbs and hindlimbs. Size and morphology s...
Article
We describe the first partial articulated skeleton from the Ganzhou area, Jianxi Province, China. This basin has not been forthcoming in yielding hadrosaurid remains. The new specimen consists of an articulated rib cage belonging to a relatively large (no less than 9 m in length) hadrosaurid. It was collected from Maastrichtian strata of the Hekou...
Preprint
We welcome any new interpretation or alternative hypothesis regarding the taxonomic affinity of the enigmatic Oculudentavis khaungraae. However, here we demonstrate that Li et al. have failed to provide conclusive evidence for the reidentification of HPG-15-3 as a squamate. We analyse this specimen in a matrix that includes a broad sample of diapsi...
Article
Large dinosaur tracks were recently reported from locations in the Pterosaur-Yadan National Geological Park situated about 100 km south of Hami in Xinjiang Province, China. The park comprises a substantial area in a much larger arid region comprising and extensive spectrum of Cretaceous, siliciclastic, Tugulu Group, lithofacies representing proxima...
Article
We report the discovery of concentrated invertebrate inchnofossils in close association with a dinosaur nest from the Hekou Formation in Jiangxi Province, China. The seven dinosaurian eggs reported clearly belong to the Elongatoolithidae and burrow traces were most likely made by small crustaceans. This association prompts the question as to whethe...
Article
A dinosaur track assemblage from a remote, high altitude (∼4,500–5,000 m) site on the is the first to be reported from this area. The location, here named the Yangguang tracksite, represents the Lower Cretaceous part of the Kezilesu Group consisting of feldspathic sandstones and dated as Hauterivian–Barremian on the basis of the palynoflora. As the...
Article
It has long been known that Lower Jurassic theropod track assemblages are dominated by theropod tracks including Eubrontes and Grallator, known from North America since the mid 19th century. It was only comparatively recently that it was recognised that these ichnogenera where also abundant in other regions including China, making them important co...
Article
The trace elements and isotopic compositions of macroelongatoolithid eggshells provide insights into the palaeoenvironment of these huge eggs preservation. We analysed the geochemical characteristics of newly discovered macroelongatoolithid eggs from the early Cretaceous Zhaoying Formation in the Xixia Basin, Henan Province, China. X-ray diffractio...
Article
Including zoochory, mechanisms of seed dispersal varied along with the adaptive radiation of angiosperms, but few early fossil records had been reported with specialized pericarp structure. The present study describes a new specimen from Myanmar amber, denominated Rasenganus auricularus gen. et sp. nov. In this specimen, the spirally coiled structu...
Article
Recent discoveries of enantiornithine remains in Burmese amber have provided a wealth of paleobiological data on this extinct clade of Mesozoic birds. Amber, as a unique medium of fossilization, preserves in three dimensions structures with details unmatched elsewhere in the fossil record. This provides the opportunity to combine osteological infor...
Article
Full-text available
Skeletal inclusions in approximately 99-million-year-old amber from northern Myanmar provide unprecedented insights into the soft tissue and skeletal anatomy of minute fauna, which are not typically preserved in other depositional environments1,2,3. Among a diversity of vertebrates, seven specimens that preserve the skeletal remains of enantiornith...
Article
A total of 82 lizard specimens in amber have been reported around the world to date. Records of lizard inclusions extend from the Cretaceous to the Neogene: (1) Cretaceous lizard inclusions are dominated by Autarchoglossans from Lebanon and a diverse lizard fauna from Myanmar (Burma); (2) Paleogene lizard inclusions are relatively poorly preserved...
Article
A total of 82 lizard specimens in amber have been reported around the world to date. Records of lizard inclusions extend from the Cretaceous to the Neogene: (1) Cretaceous lizard inclusions are dominated by Autarchoglossans from Lebanon and a diverse lizard fauna from Myanmar (Burma); (2) Paleogene lizard inclusions are relatively poorly preserved...
Article
The lizard genus Yabeinosaurus is a common and relatively well-known member of Chinese Lower Cretaceous Jehol Biota, found in both the Yixian and Jiufotang formations of north-eastern China. Previous research on Yabeinosaurus has revealed information on its morphology, phylogenetic position, colouration, diet, and viviparous reproductive strategy....
Article
Xenoxylon is an important boreal Mesozoic fossil wood genus and has been widely reported from sites across northern China. This paper reports well-preserved Xenoxylon wood from the Jurassic-Cretaceous boundary Tuchengzi Formation at Yanqing, Beijing, China. The fossil wood described here is ascribed to two species, i.e. Xenoxylon latiporosum and X....
Article
The newly discovered Maoshajing tracksite in the Lower Jurassic Longtoushan Group of Guizhou Province, China is dominated by well-preserved medium-sized theropod tracks of the Grallator-Eubrontes plexus type, and associated with a few sauropod tracks. This saurischian dominated ichnofauna is typical of the Lower Jurassic biochron of China and elsew...
Article
All of the bird specimens previously recovered from Burmese amber have belonged to either immature specimens, or small-bodied taxa belonging to Enantiornithes. This has led to questions about whether the size bias inherent to preservation in amber has limited inclusions to smaller individuals or species, or if the avifauna of the amber-producing fo...
Article
Even in the absence of associated skeletal material, isolated feathers in amber remain of high scientific interest. The remarkable preservation of these delicate structures in amber implies a potential for significantly improving our knowledge of feather evolution and diversity. A large sample set of 150 Burmese amber specimens (Upper Cretaceous, ~...
Article
Classifications and comparisons of petrified wood are currently based primarily on observable morphologies. The mineralogical characteristics of specimens collected from Qian Jiandian, Yanqing UNESCO Global Geopark, Beijing, China and Sigri, Lesvos Island UNESCO Global Geopark, Greece, were compared in this study to enhance the conservation and pro...
Article
Slabs with tetrapod tracks from the Madigou Village quarry in the Tuchengzi Formation have famously been used as building stones at the imperial summer resort locality, also referred to in the ichnological literature as the “Chengde Summer Palace.” The Jurassic-Cretaceous boundary Tuchengzi Formation has elsewhere in the region yielded differently...
Article
The Early Cretaceous lizard Yabeinosaurus is well-represented in the Jehol Biota of northeast China, with specimens yielding information on ontogenetic development, reproductive strategy, and diet, as well as skeletal morphology. However, a large, well-preserved, new specimen of Yabeinosaurus robustus from the Lamadong locality, Liaoning, provides...
Article
Full-text available
Since the first skeletal remains of avians preserved in amber were described in 2016, new avian remains trapped in Cretaceous-age Burmese amber continue to be uncovered, revealing a diversity of skeletal and feather morphologies observed nowhere else in the Mesozoic fossil record. Here we describe a foot with digital proportions unlike any previous...
Article
Full-text available
Excellently preserved fossils often provide important insights into evolutionary histories and adaptations to environmental change in Earth's biogeologic record. Mid-Cretaceous Burmese amber, for example, is a proven reservoir for spectacular findings. Here we document the first record of a fossil land snail with periostracal hairs preserved in amb...
Article
Full-text available
The eggs of fish, amphibians, and many invertebrates are soft, delicate structures that are only rarely preserved in the fossil record. Here we report egg masses preserved as inclusions in mid-Cretaceous amber deposits of Myanmar. Of five specimens recovered, three of the egg masses probably pertain to insects, but the other two appear different. O...
Conference Paper
Full-text available
Tracks documenting subaqueous activity of terrestrial or semi-aquatic tetrapods are common in the Mesozoic record. Numerous examples of swimming dinosaurs or other tetrapods, in particular turtles, phytosaurs and crocodylomorphs are known. Marine forms, however, rarely left their imprints on the bottom of shallow water while buoyant, drifting or ac...
Article
The Cretaceous Hengshan Formation at the Baxian tracksite, central Zhejiang has yielded more than 20 sauropod tracks with a considerable size range (pes length ranging from 22.7–83.7 cm). The assemblage consists of a more complete trackway of a large animal, a less complete trackway of a large animal with a similar orientation and, a small manus-pe...
Article
The Middle Triassic (Anisian) Guanling Formation in Yunnan and Guizhou provinces, southwestern China, is well-known for its marine-reptile fauna with numerous well-preserved skeletons. Tetrapod footprints from this unit have been reported of both terrestrial and marine forms documenting a marginal marine environment in the eastern Tethys region. In...
Article
A sauropod track assemblage from a surface in the Upper Jurassic fluvial Tianchihe Formation at the Guanxi site, Shanxi Province, China, is re-documented and analysed in detail, together with a recently discovered new locality situated nearby. In contrast to earlier reports, the former includes four trackways plus isolated tracks (41 tracks in tota...