THE OLDEST HORSESHOE CRAB: A NEW XIPHOSURID FROM LATE ORDOVICIAN KONSERVAT-LAGERSTÄTTEN DEPOSITS, MANITOBA, CANADA

@article{Rudkin2008THEOH,
  title={THE OLDEST HORSESHOE CRAB: A NEW XIPHOSURID FROM LATE ORDOVICIAN KONSERVAT-LAGERST{\"A}TTEN DEPOSITS, MANITOBA, CANADA},
  author={D. Rudkin and G. Young and G. Nowlan},
  journal={Palaeontology},
  year={2008},
  volume={51},
  pages={1-9}
}
A remarkable new fossil horseshoe crab, Lunat- aspis aurora gen. et sp. nov., from recently discovered Upper Ordovician (c. 445 Ma) shallow marine Konservat-Lagerstat- ten deposits in Manitoba (Canada), is characterized by fusion of opisthosomal tergites into two sclerites. A broad mesosoma of six or seven fused segments, followed by a narrow metasoma of three reduced segments, represents an advanced transitional condition in the development of the xiphosurid thoracetron. Lunataspis further… Expand

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