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  1. No Access

    Article

    Copulation in antiarch placoderms and the origin of gnathostome internal fertilization

    The discovery of claspers in fossils of antiarch placoderms, an ancient group of armoured fish, suggests that internal fertilization was the ancestral type of reproduction for all jawed vertebrates: this contr...

    John A. Long, Elga Mark-Kurik, Zerina Johanson, Michael S. Y. Lee, Gavin C. Young… in Nature (2015)

  2. Article

    Open Access

    The largest Silurian vertebrate and its palaeoecological implications

    An apparent absence of Silurian fishes more than half-a-metre in length has been viewed as evidence that gnathostomes were restricted in size and diversity prior to the Devonian. Here we describe the largest p...

    Brian Choo, Min Zhu, Wen** Zhao, Liaotao Jia, You'an Zhu in Scientific Reports (2014)

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  3. No Access

    Article

    Nothosaur foraging tracks from the Middle Triassic of southwestern China

    The seas of the Mesozoic (266–66 Myr ago) were remarkable for predatory marine reptiles, but their modes of locomotion have been debated. One problem has been the absence of tracks, although there is no reason...

    Qiyue Zhang, Wen Wen, Shixue Hu, Michael J. Benton, Changyong Zhou… in Nature Communications (2014)

  4. No Access

    Article

    A Silurian placoderm with osteichthyan-like marginal jaw bones

    The gnathostome (jawed vertebrate) crown group comprises two extant clades with contrasting character complements. Notably, Chondrichthyes (cartilaginous fish) lack the large dermal bones that characterize Ost...

    Min Zhu, **aobo Yu, Per Erik Ahlberg, Brian Choo, **g Lu, Tuo Qiao, Qingming Qu… in Nature (2013)