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The hadrosaurid dinosaur Sahaliyania elunchunorum gen. et sp. nov. from the Upper Cretaceous Yuliangze Formation at the Wulaga quarry, China. A. GMH W148, right scapula in medial (A 1 ) and lateral (A 2 ) views. B. GMH W165, right sternal in ventral view.
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Several hundred disarticulated dinosaur bones have been recovered from a large quarry at Wulaga (Heilongjiang Province, China), in the Upper Cretaceous (Maastrichtian) Yuliangze Formation. The Wulaga quarry can be regarded as a monodominant bonebed: more than 80% of the bones belong to a new lambeosaurine hadrosaurid, Sahaliyania elunchunorum gen....
Contexts in source publication
Context 1
... (Fig. 8A).-The Wulaga material includes 25 scap− ulae of different sizes that closely resemble those of Oloro− titan. For that reason, they are tentatively referred to Sahali− yania. One single specimen from Wulaga is distinctly differ− ent from the others, more closely resembling the condition observed in hadrosaurines; this specimen is ...
Context 2
... (Fig. 8B).-As in other hadrosaurids, the sternal of Sahaliyania is typically hatchet−shaped. As in lambeosauri− nes, its proximal plate is enlarged both in length and in width. It is thinner laterally than medially. The proximal plate is dis− tinctly longer than the distal "handle". Although incom− pletely preserved, the thin lateral border of ...
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... were equally weighted and analysed with PAUP*4.0b10 (Swofford, 2002), both with ACCTRAN and DELTRAN transformations. Seven most parsimonious trees of 80 steps resulted from a branch−and−bound search, with a consistency index of 0.92 and a retention index of 0.97. The strict consensus tree of the seven most parsimoni− ous trees is presented in Fig. 18 and a complete list of apomorphies is found in Appendix 4. The topology of the consensus tree is similar to those previously published by Weishampel and Horner (1990), Weishampel et al. (1993), Bolotsky and Godefroit (2004), Godefroit et al. (2004a, b), and, particularly, by Evans and Reisz (2007). To assess the stability of tree ...
Context 4
... may be regarded as a derived lambeosaurine (Fig. 18): it forms a monophyletic group with the corythosaur and parasauroloph clades (sensu Chapman and Brett−Surman 1990). This group is characterised by the following un− ambiguous (no differences in positioning of a character in ACCTRAN and DELTRAN optimisations) characters: a shortened frontal, with a "posterior length/maximal width" <0.6 ...
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Here we describe a second nyctosaurid pterosaur from the Late Cretaceous laminated limestone deposits of northeast Mexico. The specimen was discovered in the Múzquiz quarry area in northern Coahuila and comprises an isolated right wing skeleton including the humerus, radius/ulna, carpus, wing finger metacarpus and the proximal segment of wing finge...
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Citations
... Iz perioda rane krede opisane su: Shuvuuia deserti (porodica Alvarezsauridae) opisane na osnovu ostataka sakupljenih u Mongoliji koja je ţivjela prije oko 75 miliona godina (Chiappe et al, 1998) te vrsta Velociraptor mongoliensis i V. osmolskae (Dromeoesauridae) opisanih na osnovu ostataka iz Mongolije a koje su ţivjele prije između 75-71 milion godina (Osborn, 1924;Godefroit et al., 2008). ...
... Saurolophids constitute the major radiation of hadrosaurids, consisting of the clade Saurolophinae that includes species with either 'solid' crests or lacking a bony crest entirely, and the hollow-crested Lambeosaurinae (see Wagner, 2004;Prieto-M arquez et al., 2020 regarding the ancestry of the crest). This group is well-represented in the fossil record, especially from their diversity acmes in the middleeupper Campanian of North America (Lull and Wright, 1942;Lund and Gates 2006;Gates et al., 2012) and the Maastrichtian of Asia (Godefroit et al., 2008;2012a,b). ...
... Hadrosauridae is known from the Santonian (e.g., Averianov and Nessov, 1995;Godefroit et al., 2004;Averianov, 2007;Prieto-M arquez et al., 2016a) through the uppermost Maastrichtian (e.g., Godefroit et al., 2008Godefroit et al., , 2012aPrieto-M arquez et al., 2013). Fossiliferous terrestrial and paralic Santonianelower Campanian strata are only locally present in North America (e.g., Gates et al., 2011Gates et al., , 2013Gates et al., , 2014Prieto-M arquez, 2012;Freedman Fowler and Horner, 2015), and most have been not received the level of attention of northern Laramidian strata (largely in Montana and Alberta). ...
We describe a previously unrecognized genus and species of basally-branching hadrosaurid dinosaur, Malefica deckerti, from the middle-to upper Campanian upper shale member of the Aguja Formation in Big Bend National Park, southwestern Texas, USA. This taxon is represented by a partial left maxilla. The hadrosaurid maxilla is particularly useful in differentiating species, and, despite the incomplete nature of the material, this new taxon is diagnosable by several autapomorphies and a unique combination of character states. Phylogenetic analysis places M. deckerti within Hadrosauridae but outside Saurolophidae, the major hadrosaurid clade consisting of the solid-crested or unadorned Saurolophinae and the hollow-crested Lambeosaurinae. When considered with the other known non-saurolophid hadrosaurids, this species adds to the growing evidence a hitherto unrecognized diversity of early hadrosaurid offshoots spanning the upper Santonian through the Maastrichtian and widespread throughout Eurasia and North America.
... OUSM-FV-001 also differs from the immature lambeosaurine Velafrons in having the gently curved squamosal process of the postorbital ( Figure 3G). Although the incompleteness of OUSM-FV-001 hinders comparisons with the diagnostic characters of the Asian Lambeosaurini, the dentary of OUSM-FV-001 differs from those of Amurosaurus (Bolotsky et al., 2014;Godefroit et al., 2004) and Sahaliyania (Godefroit et al., 2008) in the absence of the strong ventral deflection of the anterior half of the dentary (Figure 4g-i). OUSM-FV-001 also differs from another Asian lambeosaurine Olorotitan (Godefroit et al., 2012) in the relatively short edentulous region of the dentary. ...
Despite the long history of research in the late Campanian Judith River Formation in northern Montana, most of the vertebrate fossils are represented by fragmentary remains, making precise taxonomic identifications difficult. Contrary to this, the partially contemporaneous Dinosaur Park Formation, Alberta, Canada is known for its tremendous fossil preservation, permitting rigorous studies of dinosaur diversity, evolution, and biostratigraphy. Hadrosaurids comprise one of the most abundant dinosaur clades in the Dinosaur Park Formation, but taxonomic affinities of hadrosaurid specimens remain poorly understood in the Judith River Formation. Corythosaurus is the most common hadrosaurid in the Dinosaur Park Formation and, to date, has been restricted to this formation. This study reports the first definitive Corythosaurus specimens from the Judith River Formation, which were discovered on two private ranches in northern Montana. The attribution of the most complete skeleton to Corythosaurus is indicated by: wide crest-snout angle, presence of premaxilla-nasal fontanelle, dorsoventrally expanded nasal, laterally exposed ophthalmic canal of the laterosphenoid, and tall neural spines. A second specimen preserves a large ilium that can be positively identified as Corythosaurus based on its associated skull, which is now in private hands. The specimens were recovered from the Coal Ridge Member of the Judith River Formation, which is approximately time equivalent to the Dinosaur Park Formation. Thus, the discovery of Corythosaurus in the Judith River Formation extends the biogeographic range of this genus and establishes a framework for future interformational biostratigraphic studies of Late Cretaceous dinosaur faunas in North America.
... This study uses hadrosaurid beak shape and limb segment proportions as proxies of food selection and locomotor cost, respectively, to test the ecomorphological adaptations for foraging strategy in hadrosaurids. Hadrosaurines and lambeosaurines are likely to have co-existed in the same space as suggested by multitaxic bonebeds (e.g., Varricchio and Horner, 1993;Godefroit et al., 2008;Takasaki et al., 2019), thus they were potentially ecological competitors to each other in some extent. The foraging ecomorphologies are compared between the hadrosaurid subfamilies since taxonomic differences in feeding ecomorphology are considered an important factor for dietary niche separation (Gordon and Illius, 1988;Carrano et al., 1999). ...
... On the other hand, the shortened distal limb segment of hadrosaurines might have benefitted them in sloped terrains, as suggested in bovids (Higgins and Ruff, 2011). The differences in locomotor ecology may imply a slight difference in hadrosaurid habitat preferences, although the subfamilies generally share the same space as demonstrated in multitaxic bonebeds (e.g., Varricchio and Horner, 1993;Godefroit et al., 2008). ...
... It should be kept in mind that the comparisons in this study are not limited to the sympatric species as previous works Mallon and Anderson, 2014) attempted. At the same time, however, multitaxic bonebeds evidence the coexistence of hadrosaurines and lambeosaurines throughout the world (e.g., Varricchio and Horner, 1993;Godefroit et al., 2008). To establish such a cosmopolitan sympatric distribution, niche partitioning must have been established, or either group is expected to outcompete the other (competitive exclusion principle; Hardin, 1960). ...
Hadrosauridae, consisting of two subfamilies (Hadrosaurinae and Lambeosaurinae), is a successful herbivorous dinosaur group that established a high taxonomic diversity and a cosmopolitan biogeographic distribution during the Late Cretaceous. While its success is often attributed to a highly specialized oral processing system, the foraging strategy of this group remains unclear. This study focuses on two critical factors in foraging strategy, food selectivity and locomotor ecology, in these hadrosaurid subfamilies. Three-dimensional beak shapes and limb segment proportions are used as the proxies for food selectivity and locomotor ecology, respectively. The beak shape analysis demonstrates trends of anteriorly acute beaks in hadrosaurines and anteriorly wide beaks in lambeosaurines. The limb segment proportion analysis shows short proximal limb segments in hadrosaurines and long proximal limb segments in lambeosaurines. These results suggest that hadrosaurines preferred selective consumption of high-quality food with energy-inefficient locomotor ecology, while lambeosaurines preferred mass consumption of low-quality food with energy-efficient locomotion and that differences in foraging strategy might have enhanced dietary niche partitioning in the subfamily level of hadrosaurids. In addition, this study tests a relationship between limb proportions and habitat environments in hadrosaurids. We demonstrate that hadrosaurids from the coastal environments have shorter forelimbs than those from the terrestrial environment. Since short forelimbs are better suited for temporal bipedalism than long forelimbs, the limb proportion difference may indicate adaptations to different feeding heights, possibly due to different regional vegetations.
... 7), Parasaurolophus cyrtocristatus (Gates et al. 2021: figs. 5, 9, 13), Parasaurolophus tubicen (Sullivan and Williamson 1999: Fig. 8), Sahaliyania elunchunorum (Godefroit et al. 2008 : Fig. 3), and Secernosaurus koerneri (Prieto-Márquez and Salinas 2010: figs. 6, 7). ...
The hadrosauroid Telmatosaurus and the rhabdodontid Zalmoxes were the first and second dinosaur taxa that were described in detail from the famous Upper Cretaceous continental deposits of the Haţeg Basin by Franz Baron Nopcsa at the beginning of the twentieth century. Although they are among the most common and best-known dinosaurs discovered from these deposits, there are still many open questions as to their taxonomy and anatomy. Here, we re-describe two partial braincases from the uppermost Cretaceous of the Haţeg Basin that have been recently referred to the rhabdodontid Zalmoxes and re-assign them to hadrosauroids, possibly to Telmatosaurus . These specimens both exhibit basicranial features that are characteristic of derived hadrosauroids but are absent in more basal iguanodontians. These include an antero-posteriorly short basioccipital lacking a distinct neck, the presence of two well-developed sphenoccipital tubercles on the ventral aspect of the braincase and that are directly positioned anterior to the basioccipital, as well as a deep depression on the ventral aspect of the braincase between the sphenoccipital tubercles. The comparison provided herein demonstrates several important differences between the basicranium of hadrosauroids and that of rhabdodontids, which allows for the confident identification of even isolated and incomplete specimens. Moreover, the removal of the only basicranium that has been referred to Zalmoxes shqiperorum prompts a revised diagnosis of that species.
... This analysis indicates that the ancestral area of Hadrosauridae was in Appalachia, in agreement with previous analyses (Prieto-M arquez, 2010;Prieto-Marquez et al., 2016;Gates and Lamb, 2021), with a dispersion to south Laramidia once again, represented by Aquilarhinus, during Turonian. The most common recent ancestor of Euhadrosauria are Asian in origin (Fig. 3), as suggested by Godefroit et al. (2008), Larson et al. (2014), and more recently by Kobayashi et al. (2021). ...
... The ancestral area of Saurolophinae is inferred in Asia and northern Laramidia (Fig. 3), where Wulagasaurus Godefroit, Hai, Yu, and Lauters, 2008, and Brachylophosaurini have been recorded and evolved after two dispersals and one vicarian event in the early Coniacian. No later than the early Campanian, the Kritosaurini dispersed in both provinces of Laramidia and also into South America, as is represented by Bonapartesaurus and Secernosaurus. ...
This work provides a review of the taxonomic diversity, phylogenetic relationships, and historical biogeography of the seven described hadrosauroids from Mexico. Their interrelationships were inferred via maximum parsimony analysis, which indicates that these taxa are part of five groups: unnamed clade of basal Hadrosauromorpha (Huehuecanauhtlus tiquichensis), Kritosaurini (Kritosaurus navajovious, IGM 6685), Edmontosaurini (Sabina’s taxon, PASAC-1), Parasaurolophini (Tlatolophus galorum), and Lambeosaurini (Magnapaulia laticaudus, Velafrons coahuilensis, and Latirhinus uitstlani). To trace back their biogeographical history, the ancestral range reconstruction was implemented using Statistical Dispersal Vicariance Analysis, which reveals that these hadrosauroids represent a southern Laramidia-Asia common ancestral range. It also shows that these dinosaurs evolved via three vicariance and two dispersals events during the Turonian, Coniacian, Santonian and Campanian age, representing a complex biogeographical history.
... Although North American brachylophosaurins are confined to the Campanian, the presence of the brachylophosaurin, Wulagasaurus dongi in the Maastrichtian Yuliangze Formation (approximately 69 Ma) of China (Godefroit et al. 2008), suggests that this taxon is a Late Cretaceous immigrant back to Asia via the Bering land bridge, as has been postulated for other Asian taxa such as Saurolophus osborni (Hadrosauridae:Saurolophini), Sinoceratops zhuchengensis (Ceratopsidae:Centrosaurinae), and Tarbosaurus baatar (Tyrannosauridae) (Russell 1993;Xu et al. 2010aXu et al. , 2010bLoewen et al. 2013). If this is the case, then there is a significant gap in the brachylophosaurin fossil record between their last recorded occurrence in North America and their first occurrence in Asia. ...
Hadrosaurids are a diverse and widely distributed group of ornithischian dinosaurs that are particularly well represented in the upper Campanian Dinosaur Park Formation of the Belly River Group of Alberta. However, the origin of this hadrosaurid diversity in Alberta is poorly understood, as the lower Campanian terrestrial deposits of the underlying Oldman and Foremost formations of the group have produced comparatively few body fossils. Here we provide the first description of a partially articulated hadrosaurid and hadrosaurid material from a bonebed from the Foremost Formation and refer it to the brachylophosaurin Probrachylophosaurus sp. indet. The material represents the oldest occurrence of Brachylophosaurini in Alberta and the oldest known hadrosaurid diagnostic to the genus level from Canada. In Alberta, Hadrosaurinae display a distinct pattern of replacement with the tribes Brachylophosaurini and Kritosaurini being confined to the lower to middle Campanian strata (below the marine Bearpaw Formation) and replaced above the Bearpaw Formation by members of Saurolophini (Prosaurolophus, Saurolophus) and Edmontosaurini (Edmontosaurus), with the latter clade persisting to the end of the Maastrichtian. Although the worldwide stratigraphic distribution of the Hadrosaurinae is complex, this pattern generally holds true for northern Laramidian hadrosaurine tribes, suggesting that their pattern of evolution and replacement may be driven by some common underlying factor such as an environmental response to fluctuations in the margins of the Western Interior Seaway due to sea level change.
... Comparisons with other hadrosaurids.-The angle of ventral deflection of the ilium greater than 150°, present in FCBUANL_2711 and Velafrons coahuilensis, is also present in the material tentatively referred to the Asian hadrosaurine Kundurosaurus nagornyi Lauters, 2012b, AENM 2/922-7L (Godefroit et al. 2012b), relegated as a junior synonym of Kerberosaurus mana kini Godefroit, 2004, by Xing et al. (2014), in the south American hadrosaurine Bonapartesaurus rionegrensis Cruzado-Caballero andPowell, 2017 (Cruzado-Caballero andPowell 2017), and the Asian lambeosaurine Sahaliyania elunchunorum Godefroit, Shulin, Tingxiang, and Lauters, 2008 (Godefroit et al. 2008). The ilium of FCBUANL_2711 differs from K. manakini by having a wide preacetabular process, a notable characteristic in lambeo saurines (Brett-Surman 1989). ...
... The preacetabular process of the ilium also shows a ventral projection close to the cranial end where it narrows distally, as in other lambeosaurine specimens like FMNH P27393 Parasaurolophus cyrtocristatus Ostrom, 1961a(Ostrom 1961a, LACM 20874 Magnapaulia laticaudus Morris, 1981) and AEHM 2/846 Olorotitan arharensis Alifanov, 2003 (Godefroit et al. 2012a). The ilium shows a simi lar morphology to the GMH W103 an ilium referred to S. elunchunorum (Godefroit et al. 2008), but the preacetabular notch of FCBUANL_2711 is narrower than in GMH W103. The absence of the supracetabular crest and postacetabular process prevents a more extensive comparison, since in these regions possess important diagnostic characters for the clade (Prieto-Márquez 2010b). ...
New hadrosaurid postcranial material is reported, collected near Presa San Antonio, Parras de la Fuente municipality, Coahuila, Mexico, in a sedimentary sequence belonging to the upper Campanian of the Cerro del Pueblo Formation, in the Parras Basin. The skeletal remains include partial elements from the pelvic girdle (left ilium, right pubis, ischium, and incomplete sacrum), a distal end of a left femur, almost complete right and left tibiae, right metatarsals II and IV, cervical and caudal vertebrae. Also, partially complete forelimb elements are present, which are still under preparation. The pubis shows characters of the Lambeosaurinae morphotypes, but the lack of cranial elements does not allow us to directly differentiate this specimen from the already described hadrosaurid taxa from the studied area, such as Velafrons coahuilensis, Latirhinus uitstlani, and Kritosaurus navajovius. This specimen, referred as Lambeosaurinae indet., adds to the fossil record of the hadrosaurids in southern Laramidia during the Campanian.
... it is not the goal of this study to delve deeply into hadrosauroid biogeography, there are some ancillary results of our analysis that are worth discussing. At a broader level, our inference of ancestral areas on the temporally calibrated cladogram (Fig. 4) supports previous studies that postulated an Asian origin for hadrosauroids (Wiman 1929;Rozhdestvensky 1967;Brett-Surman 1979;Milner and Norman 1984;You et al. 2003;Godefroit et al. 2008). After originating in Asia during the Early Cretaceous, hadrosauroids are reconstructed here to have diversified in this continent for most of their pre-hadrosaurid evolution, with the exception of the dispersal to Laramidia no later than the early Cenomanian leading to the Eolambia-Jeyawati clade (Fig. 4). ...
... They are taphonomically distorted and have lost their dorsal and ventral margins. All fragments have narrow, subvertical, parallel dentary alveoli (alveolar sulci), as is characteristic of Hadrosauridae (Horner et al., 2004;Godefroit et al., 2008Godefroit et al., , 2012Prieto-Márquez et al., 2016). The septa that separate the alveoli are thin and sheet-like. ...
We describe and incorporate fragmentary new cranial and postcranial materials of hadrosaurid ornithopods into the non-avian dinosaur assemblage of the Upper Cretaceous (Coniacian–Maastrichtian) Lago Colhué Huapi Formation of central Patagonia, south-central Chubut Province, Argentina. The fossils come from the upper part of the formation, probably from a stratigraphic interval close to the Cretaceous/Paleogene boundary. The materials belong to at least two ontogenetically distinct individuals that are assigned to Hadrosauridae due to their possession of anatomical features that characterize this derived ornithopod group. Sedimentological inferences reveal that the paleoenvironment of these hadrosaurids was characterized by high-sinuosity, meandering-type fluvial channels, whereas palynological data suggest the existence of low-energy freshwater bodies in the floodplains of these rivers and a warm and humid paleoclimate. The deposition of the upper part of the Lago Colhué Huapi Formation was probably influenced by the Patagonian Atlantic marine transgression, which may have played an important role in the distribution of this sedimentary unit. The new Lago Colhué Huapi Formation hadrosaurid specimens constitute the most stratigraphically recent records of this clade from Argentina. The materials contribute to the interpretation of Upper Cretaceous hadrosaurid paleobiogeography in Patagonian basins; moreover, sedimentological and palynological data suggest that paleoenvironmental conditions may have exerted an important influence on South American hadrosaur distribution, supporting hypotheses of ornithopod faunal turnover during the Late Cretaceous of central Patagonia. Finally, the new remains add to the generally depauperate record of Late Cretaceous ornithopods in the Southern Hemisphere.
