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.
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