8 Works

Data from: Anisian (Middle Triassic) ammonoids from British Columbia (Canada): biochronological and palaeobiogeographic implications

Cheng Ji & Hugo Bucher
New Anisian (Middle Triassic) ammonoids are reported from British Columbia (BC), Canada. Eight species are reported, including one new genus and two new species: Eufrechites roopnarini gen. et sp. nov. and Parafrechites cordeyi sp. nov. New ammonoid subzones are recognized, leading to improved correlation between BC and Nevada: the Hollandites minor Zone is correlated with the interval intercalated between the Unionvillites hadleyi Subzone and the Pseudodanubites nicholsi Subzone; an Eogymnotoceras thompsoni - Anagymnotoceras spivaki Zone...

Data from: A review of the defining chemical properties of soda lakes and pans: an assessment on a large geographic scale of Eurasian inland saline surface waters

Emil Boros & Marina Kolpakova
The aim of this study is to evaluate the definition of water chemical type, with particular attention to soda brine characteristics by assessing ionic composition and pH values on a large geographic scale and broad salinity (TDS) range of Eurasian inland saline surface waters, in order to rectify the considerable confusion about the exact chemical classification of soda lakes and pans. Data on pH and on the concentration of eight major ions were compiled into...

Data from: New armoured scalidophorans (Ecdysozoa, Cycloneuralia) from the Cambrian Fortunian Zhangjiagou Lagerstätte, South China

Yunhuan Liu, Jiachen Qin, Qi Wang, Andreas Maas, Baichuan Duan, Yanan Zhang, Hu Zhang, Tiequan Shao & Huaqiao Zhang
Although molecular studies estimated that cycloneuralians might have originated in the Ediacaran Period and diversified in the early Cambrian, it was not until 2014 that they were first reported from the Cambrian Fortunian Stage. To date only two species and five indeterminate forms have been described. Here, we report new three‐dimensionally phosphatized microfossils of cycloneuralians from the Fortunian Zhangjiagou Lagerstätte, South China. Two new genera and species, Qinscolex spinosus gen. et sp. nov. and Shanscolex...

Data from: The early record of halysitid tabulate corals, and morphometrics of Catenipora from the Ordovician of north-central China

Kun Liang, Robert J. Elias & Dong-Jin Lee
Catenipora is one of the most common tabulate coral genera in the Upper Ordovician Jinghe and Beiguoshan formations on the southern margin of the Ordos Basin, north-central China. We distinguish and identify the species of Catenipora using multivariate morphometric procedures. Cluster analysis based on morphological characters of coralla yields a dendrogram showing five morphospecies. The validity and distinctiveness of the morphospecies are evaluated by discriminant analysis and non-metric multidimensional scaling. To identify the species represented...

Data from: Diatoms do radiate: evidence for a freshwater species flock

Björn Stelbrink, Elena Jovanovska, Zlatko Levkov, Nadja Ognjanova-Rumenova, Thomas Wilke & Christian Albrecht
Due to the ubiquity and high dispersal capacity of unicellular eukaryotes, their often extraordinary diversity found in isolated and long-lived ecosystems such as ancient lakes is typically attributed to multiple colonization events rather than to in situ speciation. However, respective evolutionary studies are very scarce and the often high number of species flocks in ancient lakes across multicellular taxa raises the question whether unicellular species, such as diatoms, may radiate as well. Here, we use...

Data from: The hatching mechanism of 130-million-year-old insects: an association of neonates, egg shells and egg bursters in Lebanese amber

Ricardo Pérez-De La Fuente, Michael S. Engel, Dany Azar & Enrique Peñalver
Hatching is a pivotal moment in the life of most animals. Diverse chemical, behavioural and mechanical methods have evolved in metazoans to break the egg membranes. Among them, many arthropod and vertebrate embryos hatch using ephemeral, frequently convergent structures known as egg bursters. However, the evolutionary processes by which hatching mechanisms and related embryonic structures became established in deep time are poorly understood due to a nearly complete absence from the fossil record. Herein we...

Data from: Ecological stasis in Spinicaudata (Crustacea, Branchiopoda)? Early Cretaceous clam shrimp of the Yixian Formation of north‐east China occupied a broader realized ecological niche than extant members of the group

Manja Hethke, Franz T. Fürsich, Baoyu Jiang, Bo Wang, Patrick Chellouche & Stephen C. Weeks
The palaeoecology of Spinicaudata, the dominant group of benthic invertebrates in many pre-Cenozoic freshwater environments, remains poorly understood. In analogy with extant taxa, it has been oversimplified and often reduced to shallow, temporary environments characterised by few trophic levels, implying ecological stasis from the Devonian to the Recent. We excavated 43 horizons of the Lower Cretaceous Yixian Formation (Anjiagou and Hengdaozi beds) to evaluate whether spinicaudatan ecology can be simplified to such an extent. Sedimentological...

Data from: The early history of Annonaceae (Magnoliales) in Southeast Asia suggests floristic exchange between India and Pan-Indochina by the late Oligocene

Qijia Li, Gongle Shi, Yusheng Liu, Qiongyao Fu, Jianhua Jin & Cheng Quan
The collision between India and Eurasia in the mid‐Palaeogene facilitated terrestrial floristic exchange. However, due to the complexity of this geological event and scarcity of fossil record, the plant migration patterns between the two plates are still highly debated. In this study, we focus on the Oligocene floristic exchange between India and Pan‐Indochina mainly based on a carpological study of Annonaceae, an emblematic family unique in its pantropical distribution and frugivore‐based dispersal strategy. A new...

Registration Year

  • 2018
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Affiliations

  • Institute of Geology
    8
  • Chang'an University
    2
  • University of Kansas
    1
  • Sun Yat-sen University
    1
  • Jilin University
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  • Nanjing Institute of Geology and Paleontology
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  • Nanjing University
    1
  • University of Zurich
    1
  • University of Manitoba
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  • University of Akron
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