Karthickia verestigmata gen. et sp. nov. – an interesting diatom with frustular morphology similar to several different cymbelloid diatom genera. Issue 6 (2nd November 2019)

• Record Type: Journal Article
• Authors: Glushchenko, Anton; Kuznetsova, Irina; Kociolek, John Patrick; Kulikovskiy, Maxim
• Is Part Of: Phycologia. Volume 58:Issue 6(2019)
• Page Start: 605
• Page End: 613
• Publication Date: 2019-11-02
• Subjects: Cymbopleura -- Diatoms -- Laos -- Morphology -- Taxonomy -- Vietnam; Algology -- Periodicals; Algae -- Periodicals; Algae; Natuurkunde; Algae; Periodicals; Electronic journals; 579.805
• DOI: 10.1080/00318884.2019.1626605
• Languages: English
• ISSNs: 0031-8884

Abstract

ABSTRACT: Light and scanning electron microscope observations are presented for Karthickia verestigmata gen. et sp. nov . The taxon is described from Laos and Vietnam. This diatom has features that would suggest similarities with Cymbopleura, Cymbella and Oricymba . The new taxon is characterised by the presence of a single external stigma opening that has two elongated slit-like openings internally, residing within two longer central striae. These slit-like furrows occupied one-third of stria length near the central area. The presence of a stigma suggests a relationship of this species with genera such as like Cymbella and Oricymba, and the single external opening with two internal openings is similar to that in Oricymba . Internally, areolae are covered by tectulla that are not typical for Cymbopleura but known in species of Cymbella as well as Gomphonema . The morphological features of this unique taxon lead us to conclude that it is best accommodated in a new genus.