Navithidium gen. nov., a new monoraphid diatom (Bacillariophyceae) genus based on Achnanthes delicatissima Simonsen. Issue 2 (3rd April 2021)

• Record Type: Journal Article
• Authors: Al-Handal, Adil Y.; Romero, Oscar E.; Eggers, Sara Lena; Wulff, Angela
• Is Part Of: Diatom research. Volume 36:Issue 2(2021)
• Page Start: 133
• Page End: 141
• Publication Date: 2021-04-03
• Subjects: achnanthoid species -- Achnanthes -- Baltic Sea -- monoraphid -- Navithidium -- new genus -- Sweden; Diatoms -- Periodicals; Diatoms -- Research -- Periodicals; Diatoms; Diatoms -- Research; Periodicals; 579.85
• DOI: 10.1080/0269249X.2021.1921039
• Languages: English
• ISSNs: 0269-249X

Abstract

Abstract : We investigated the ultrastructure of Achnanthes delicatissima Simonsen in materials collected from the Swedish Baltic coast. Valve structure differs markedly from that of Achnanthes sensu lato, particularly in the absence of cribrate areolae which separates Achnanthes from all other members of the family Achnanthaceae. Comparing this species with those recently described achnanthoid genera, such as Scalariella Riaux-Gobin & Witkowski and Madinithidium Witkowski, Desrosiers & Riaux-Gobin revealed morphological differences that warrant the erection of a new genus, Navithidium . Owing to the small size of the frustules, it is difficult to identify Navithidium delicatissima in light microscopy due to similarities with some closely related taxa like Achnanthidium pseudochamaepinnularia (which is here transferred to Navithidium ). A comparison with related genera is provided and discussed.