A new brackish water diatom, Achnanthes secretitaeniata, from Japan

Kensuke Toyoda, Jiro Tanaka, David M. Williams

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A new monoraphid diatom, Achnanthes secretitaeniata, is decribed from brackish water in the coast, Yamada-machi, Shimohei-gun, Iwate Pref., Japan. Cell shape is more or less linear with rounded extremities. Rapheless sternum grows close to the margin of the araphid valve. Araphid valve margin is well developed, but does not form marginal ridge as in A. yaquinensis and A. subconstricta. Valvocopulae and copulae are open- ended at both poles of valve. This species is closely related to A. brevipes C. Agardh var. intermedia (Kütz.) Cleve, but, they can be easily distinguished from each other by the position of rapheless sternum and the structure of valve margin on their araphid valves.

Original languageEnglish
Pages (from-to)19-26
Number of pages8
JournalJournal of Japanese Botany
Issue number1
Publication statusPublished - 2009 Feb


  • Achnanthes secretitaeniata
  • Achnanthes sensu stricto
  • Brackish water
  • Morphology
  • New species

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science


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