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. 2022 Jan 21:188:167-175.
doi: 10.3897/phytokeys.188.77882. eCollection 2022.

 Achnanthidiumbratanense sp. nov. (Bacillariophyceae, Achnanthidiaceae), a new diatom from the Lake Bratan (Bali, Indonesia)

Dmitry A Kapustin  1 , Anton M Glushchenko  1 , Maxim S Kulikovskiy  1
Affiliations

 Achnanthidiumbratanense sp. nov. (Bacillariophyceae, Achnanthidiaceae), a new diatom from the Lake Bratan (Bali, Indonesia)

Dmitry A Kapustin et al. PhytoKeys. .

Abstract

A new species, Achnanthidiumbratanense, is described from Lake Bratan, located on the island of Bali (Indonesia). The morphology of this species was analyzed with light (LM) and scanning electron microscopy (SEM). A.bratanense is characterized by linear-elliptic to nearly elliptic valves with convex margins and rounded, broadly subcapitate apices. The striae of this species are hardly discernable under LM; they are weakly radiate throughout the valve and composed of one to four large transapically elongated areolae of different length and shape. The most similar taxon to A.bratanense is A.macrocephalum, a species described from Sumatra, another Indonesian island. The differences of A.bratanense from similar taxa are discussed.

Keywords: Indonesia; monoraphid diatoms; morphology; new species.

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Figures

Figure 1.
Figure 1.
A–TAchnanthidiumbratanense sp. nov. (LM). A–S size diminution series showing variation in valve outline A holotype specimen A-D, F-I, K, M, N, R raphe valves E, J, L, O-Q, S rapheless valves T frustule in girdle view. Scale bar: 10 μm.
Figure 2.
Figure 2.
A–GAchnanthidiumbratanense sp. nov. (SEM). A, B raphe valve, external view C, D rapheless valve, external view E, F raphe valve, internal view G rapheless valve, internal view. Scale bar: 1 μm.
See this image and copyright information in PMC

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