A new species of the genus Adocus (Adocidae, Testudines) from the lower cretaceous of Southwest Japan

Teppei Sonoda, Ren Hirayama, Yoshihiko Okazaki, Hisao Ando

Research output: Contribution to journalArticle

3 Citations (Scopus)


Adocus sengokuensis sp. nov. is described on the basis of disarticulated shell elements (nuchal, first peripherals, left fourth peripheral, left second costal, left hyoplastron, and right hypoplastron) collected from a lacustrine mudstone of the Lower Cretaceous Sengoku Formation, Kanmon Group in Miyawaka City, Fukuoka Prefecture, Japan. A. sengokuensis is characterized by its small size with a carapace estimated at only 29 cm long, a trapezoidal cervical scale greater in width than length, and a narrow lateral projection of the first pleural scale of the fourth peripheral. Small size and wide cervical scale suggest that this new species is the most basal taxon of the genus Adocus.

Original languageEnglish
Pages (from-to)26-32
Number of pages7
JournalPaleontological Research
Issue number1
Publication statusPublished - 2015 Jan 1



  • Adocidae
  • Adocus sengokuensis
  • Early Cretaceous
  • Japan
  • Trionychoidea
  • fossil turtle

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology

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