Morphological investigations of Achnanthes javanica grunow and A. subconstricta (Meister) comb. nov

Kensuke Toyoda, Tamotsu Nagumo, Keigo Osada, Jiro Tanaka

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13 Citations (Scopus)

Abstract

The morphology and fine structure of two marine monoraphid diatoms, Achnanthes javanica Grunow and A. subconstricta (Meister) comb. nov. (= A. javanica var. subconstricta Meister) have been investigated. Observations on the valves of type material (Grunow in Cleve & Möller 1878) of A. javanica show them to be lanceolate to linear in shape with a marginal ridge on the araphid valve but lacking terminal orbiculi. Conversely, A. subconstricta has a marginal ridge and special marginal spines as well as terminal orbiculi. From SEM observations in girdle view, A. javanica has two rows of puncta on its valvocopula, while there are three or more rows in A. subconstricta. These features support the view that A. subconstricta should be considered an independent species.

Original languageEnglish
Pages (from-to)365-375
Number of pages11
JournalDiatom Research
Volume18
Issue number2
Publication statusPublished - 2003 Nov

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ASJC Scopus subject areas

  • Aquatic Science

Cite this

Toyoda, K., Nagumo, T., Osada, K., & Tanaka, J. (2003). Morphological investigations of Achnanthes javanica grunow and A. subconstricta (Meister) comb. nov. Diatom Research, 18(2), 365-375.