Meiofaunal richness in highly acidic hot springs in Unzen-Amakusa National Park, Japan, including the first rediscovery attempt for mesotardigrada

Atsushi C Suzuki, Hiroshi Kagoshima, Glen Chilton, Gary T. Grothman, Carl Johansson, Megumu Tsujimoto

Research output: Contribution to journalArticle

1 Citation (Scopus)


Extreme environments sometimes support surprisingly high meiofaunal diversity. We sampled runoff from the acidic hot springs of Unzen, Japan. This is the type locality of Thermozodium esakiiRahm, 1937, the only tardigrade in the class Mesotardigrada, which remains contentious in the absence of corroboration or supporting specimens. Our sampling revealed at least three species of arthropods, four rotifers, and five nematodes living in the hot (ca. 40°C) and acidic (ca. pH 2.5) water, but no tardigrades.

Original languageEnglish
Pages (from-to)11-17
Number of pages7
JournalZoological Science
Issue number1
Publication statusPublished - 2017 Feb 1



  • Arthropod
  • Extreme environments
  • Low pH
  • Meiofauna
  • Nematode
  • Rotifer
  • Tardigrade

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this