The Rediscovery and Taxonomical Reexamination of the Longirostrine Crocodylian from the Pleistocene of Taiwan

Ai Ito, Riosuke Aoki, Ren Hirayama, Masataka Yoshida, Hiroo Kon, Hideki Endo

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1 Citation (Scopus)


A partial crocodylian skull was found among the paleontological collection at the Archaeological Museum, Waseda University in Honjo-shi, Saitama Prefecture. Following a bibliographical survey, this was verified as a specimen reported by Tokunaga as the first known crocodile from Taiwan but then regarded as lost due to World War II. Molten glass debris is attached to the specimen, suggesting that it had been subject to air raids during World War II in May 1945, most likely at the Waseda University campus. Based on its largest seventh maxillary alveoli and the prominent lateral expansion towards the posterior direction, this specimen was identified as Toyotamaphimeia sp.; up to now a single species under this genus has been reported. The discovery demonstrates that this crocodylian genus once had a wide geographical distribution during the Pleistocene.

Original languageEnglish
Pages (from-to)150-155
Number of pages6
JournalPaleontological Research
Issue number2
Publication statusPublished - 2018 Apr 1



  • Crocodylidae
  • East Asia
  • Pleistocene
  • Taiwan
  • Toyotamaphimeia machikanensis

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology

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