Vertebrate assemblages of the Jurassic Yanliao Biota and the Early Cretaceous Jehol Biota: Comparisons and implications

Zhou, Zhonghe; Yuan, Wang

doi:10.1016/j.palwor.2017.01.002

Cited by 55 publications

(31 citation statements)

References 98 publications

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“…This conclusion is also supported by radiometric datings from both the bed and the overlying Tiaojishan Formation, which gave an age range of 165-158 Ma, belonging mainly to the Callovian of the Middle Jurassic to the Oxfordian of the Late Jurassic (e.g. Chen et al 2004, He et al 2004, Liu et al 2006b, Chang et al 2009, Huang 2015, Xu et al 2016, Zhou & Wang 2017.…”

Section: The Age Of the Daohugou Bedmentioning

confidence: 73%

“…Consequently, they can be confidently assigned to the Callovian-Oxfordian (165-158 Ma) Haifanggou Formation underlying the slightly younger Kimmeridgian (≥157 Ma) Tiaojishan Formation (e.g. Chen et al 2004, He et al 2004, Liu et al 2006b, Chang et al 2009, Jiang et al 2010, Huang 2015, Xu et al 2016, Zhou & Wang 2017, both of which, however, are known to have produced the Yanliao Biota. The assemblage of plant fossils presented here may thus serve for the identification of other fossils from that area.…”

Section: Discussionmentioning

confidence: 99%

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Plant remains from the Middle–Late Jurassic Daohugou site of the Yanliao Biota in Inner Mongolia, China

Pott¹,

Jiang²

2017

Acta Palaeobotanica

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ABSTRACT. A late Middle-early Late Jurassic fossil plant assemblage recently excavated from two CallovianOxfordian sites in the vicinity of the Daohugou fossil locality in eastern Inner Mongolia, China, was analysed in detail. The Daohugou fossil assemblage is part of the Callovian-Kimmeridgian Yanliao Biota of north-eastern China. Most major plant groups thriving at that time could be recognized. These include ferns, caytonialeans, bennettites, ginkgophytes, czekanowskialeans and conifers. All fossils were identified and compared with species from adjacent coeval floras. Considering additional material from three collections housed at major palaeontological institutions in Beijing, Nanjing and Pingyi, and a recent account in a comprehensive book on the Daohugou Biota, the diversity of the assemblage is completed by algae, mosses, lycophytes, sphenophytes and putative cycads. The assemblage is dominated by tall-growing gymnosperms such as ginkgophytes, czekanowskialeans and bennettites, while seed ferns, ferns and other water-or moisture-bound groups such as algae, mosses, sphenophytes and lycophytes are represented by only very few fragmentary remains. The floral composition underlines the Callovian-Kimmeridgian age of the Yanliao Biota. The Daohugou/Yanliao flora is a typical member of the Middle to Late Jurassic Coniopteris-Phoenicopsis assemblage of north-eastern China, differing from the Early Cretaceous Jehol flora. Both floras probably belong to the same cycle of volcanism and sedimentation, although the Daohugou Bed is older than the Yixian Formation. The Yanliao fossil assemblage is placed in a larger palaeo-phytogeographical context and its relationships with Middle-Late Jurassic floras from north-eastern China, north-eastern and eastern Siberia and Japan are evaluated.

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Section: The Age Of the Daohugou Bedmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Plant remains from the Middle–Late Jurassic Daohugou site of the Yanliao Biota in Inner Mongolia, China

Pott¹,

Jiang²

2017

Acta Palaeobotanica

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“…Most of the Chinese Mesozoic salamander genera are monotypic except Liaoxitriton, which contains two nominal species, implying that the genus is the only vertebrate component occurred in both the Jehol and Yanliao biotas (Zhou and Wang, 2017). The type species Liaoxitriton zhongjiani Dong and Wang (1998) is known by more than 30 specimens from the Lower Cretaceous Yixian Formation in western Liaoning (see Gao et al, 2013), whereas the other nominal species ''Liaoxitriton daohugouensis'' is erected on three specimens from the Daohugou beds of Inner Mongolia (Wang, 2004a;Sullivan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Middle Jurassic stem hynobiids from China shed light on the evolution of basal salamanders

2021

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“…Among stem birds, the triosseal canal is widely accepted as present in early-diverging euornithines (Mayr, 2017;Wang et al, 2016b;Zhou and Wang, 2017). In most euornithine specimens, the acrocoracoid process is medially hooked and a prominent procoracoid process is present, features that suggest the existence of a typical, fully enclosed bony triosseal canal formed by the scapula, coracoid, and furcula.…”

Section: Discussionmentioning

confidence: 99%

Digital restoration of the pectoral girdles of two Early Cretaceous birds, and implications for early flight evolution

Wang

et al. 2021

Preprint

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Pectoral girdle morphology is a key determinant of flight capability, but in some respects is poorly known among stem birds. Here, we reconstruct the pectoral girdles of the Early Cretaceous birds Sapeornis and Piscivorenantiornis based on computed tomography and three-dimensional visualization, revealing key morphological details. Enantiornithines such as Piscivorenantiornis have a uniquely localized scapula-coracoid joint, with only one area of articulation. This single articulation contrasts with the double articulation widely present in non-enantiornithine pennaraptoran theropods, including Sapeornis and crown birds, which comprises main and subsidiary articular contacts. A partially closed triosseal canal occurs in non-euornithine birds, representing a transitional stage in flight apparatus evolution. Numerous modifications of the pectoral girdle along the line to crown birds, and lineage-specific pectoral girdle variations, produced diverse pectoral girdle morphologies among Mesozoic birds, which ensured that a commensurate range of capability levels and modes emerged during the early evolution of flight.

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Vertebrate assemblages of the Jurassic Yanliao Biota and the Early Cretaceous Jehol Biota: Comparisons and implications

Cited by 55 publications

References 98 publications

Plant remains from the Middle–Late Jurassic Daohugou site of the Yanliao Biota in Inner Mongolia, China

Plant remains from the Middle–Late Jurassic Daohugou site of the Yanliao Biota in Inner Mongolia, China

Middle Jurassic stem hynobiids from China shed light on the evolution of basal salamanders

Digital restoration of the pectoral girdles of two Early Cretaceous birds, and implications for early flight evolution

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