Neidium vietnamensis – a new diatom species (Bacillariophyceae: Neidiaceae) from Vietnam and a checklist of the genus from Southeast Asia

Abstract

A new species, Neidium vietnamensis sp. nov., is described from Phú Quóc Island, South Vietnam, Southeast Asia. The valves of this new species have a distinct linear outline with non-protracted, weakly cuneate ends and longitudinal canals that are bowed and extend towards the middle of the valve face. The areolae forming the striae are covered externally by volate projections that have a reticulated design. A detailed description of this new species is presented, based on light and scanning electron microscopy. A short review of research studies on Neidium in Southeast Asia complements this study, and a checklist of Neidium taxa previously reported from Southeast Asia is given.

Keywords:

• diatoms
• Neidium
• new species
• morphology
• Southeast Asia
• Vietnam.

Acknowledgements

Authors are grateful to the staff of the Centre of Electron Microscopy of the Papanin’s Institute for Biology of Inland Waters, RAS, for technical assistance. Samples were collected during expeditions organized and permitted by the Joint Russian-Vietnam Tropical Centre, Ecolan 3.2 theme.

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

ANTON GLUSHCHENKO http://orcid.org/0000-0002-3876-3455

JOHN PATRICK KOCIOLEK http://orcid.org/0000-0001-9824-7164

IRINA KUZNETSOVA http://orcid.org/0000-0003-0069-8376

MAXIM KULIKOVSKIY http://orcid.org/0000-0003-0999-9669

Additional information

Funding

The publication is based on research carried out with financial support provided by the Russian Science Foundation [19-14-00320].