Adlafia kociolekii sp. nov. (Bacillariophyceae): a new naviculoid diatom from the Eastern Himalayas, India

CHERAN RADHAKRISHNAN; SUDIPTA KUMAR DAS; CARLOS E. WETZEL; BALASUBRAMANIAN KARTHICK

doi:10.11646/phytotaxa.595.1.4

Issue: Vol. 595 No. 1: 3 May 2023

Type: Article

Published: 2023-05-03

DOI: 10.11646/phytotaxa.595.1.4

Page range: 062-072

Abstract views: 85

PDF downloaded: 4

Adlafia kociolekii sp. nov. (Bacillariophyceae): a new naviculoid diatom from the Eastern Himalayas, India

CHERAN RADHAKRISHNAN⁺⁻
SUDIPTA KUMAR DAS⁺⁻
CARLOS E. WETZEL⁺⁻
BALASUBRAMANIAN KARTHICK⁺⁻

Biodiversity and Paleobiology Group, Agharkar Research Institute, Pune, Maharashtra-411004, India. Affiliated with the Department of Environmental Science, Savitribai Phule University of Pune, Ganeshkind, Pune, Maharashtra-411007, India.

Centre of Excellence in Integrated Omics & Computational Biology, Utkal University, Vani Vihar, Bhubaneswar, Odisha – 751004, India.

Luxembourg Institute of Science & Technology, Department of Environmental Research & Innovation (ERIN), 41 rue du Brill, L-4422 Belvaux, Luxembourg.

Biodiversity and Paleobiology Group, Agharkar Research Institute, Pune, Maharashtra-411004, India. Affiliated with the Department of Environmental Science, Savitribai Phule University of Pune, Ganeshkind, Pune, Maharashtra-411007, India.

Sikkim new species epibryophytic northeast India aerophilic Algae

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Abstract

We describe Adlafia kociolekii sp. nov. from aerial habitats in Sikkim, India, a part of the Eastern Himalayas. The species is described based on light and scanning electron microscopic observations. The main diagnostic features include valves are clear elliptical, a narrow axial area at the centre, radiate to convergent striation, and distinctive Voigt discontinuity at both apices. In terms of ultrastructure, the features that identify this species as new are the internally presence of raphe on the elevated sternum, with distal raphe ends distinctly deflected to opposite sides of proximal ends, and distal ends terminating in long and thickened helictoglossae. The species was also recorded from wet walls and freshwater habitats of north-east India, in the present study. The morphological features of the species are compared with other closely similar taxa of Adalfia and other naviculoid genera.

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