Thylacocephala (Arthropoda) from the Lower Triassic of the South Kitakami Belt, Northeast Japan

Masayuki Ehiro, Osamu Sasaki, Harumasa Kano, Jun Nemoto, Hisayoshi Kato

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


A thylacocephalan fauna from the upper Olenekian (Lower Triassic) Osawa Formation in the South Kitakami Belt, Northeast Japan, is described. The fauna comprises three species belonging to three genera: Ankitokazocaris bandoi Ehiro and Kato sp. nov., Kitakamicaris utatsuensis Ehiro and Kato gen. et sp. nov., and Ostenocaris sp. This is the first report of fossils belonging to the class Thylacocephala from Japan, and it expands their paleogeographic distribution. As almost all genera of Thylacocephala inhabited low-latitude areas in each relevant geological time, their occurrence from the Osawa Formation supports previous opinions that the South Kitakami Belt was located in the equatorial region during the Triassic.

Original languageEnglish
Pages (from-to)269-282
Number of pages14
JournalPaleontological Research
Issue number4
Publication statusPublished - 2015 Oct 1
Externally publishedYes


  • Arthropoda
  • Early Triassic
  • Osawa Formation
  • South Kitakami Belt
  • Thylacocephala

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Palaeontology


Dive into the research topics of 'Thylacocephala (Arthropoda) from the Lower Triassic of the South Kitakami Belt, Northeast Japan'. Together they form a unique fingerprint.

Cite this