Achnanthidium petuniabuktianum sp. nov. (Achnanthidiaceae, Bacillariophyta), a new representative of the A. pyrenaicum group from Spitsbergen (Svalbard Archipelago, High Arctic)

During a survey of the freshwater littoral diatom flora from lakes and ponds in the region of Petuniabukta on Spitsbergen (Svalbard Archipelago, High Arctic region), a new Achnanthidium species, A. petuniabuktianum sp. nov., has been recorded. Achnanthidium petuniabuktianum is a new representative o...

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Bibliographic Details
Published in:Phytotaxa
Main Authors: Pinseel, Eveline, Van de Vijver, Bart, Kopalová, Kateřina
Format: Article in Journal/Newspaper
Language:English
Published: 2015
Subjects:
Biology and Life Sciences
Diatoms
morphology
Spitsbergen
Arctic Regions
new species
SPECIES BACILLARIOPHYCEAE
taxonomy
ENVIRONMENTAL-CHANGE
COMB. NOV
ICE-AGE
ECOLOGY
RIVERS
BILLEFJORDEN
COMBINATIONS
Arctic
Svalbard
Svalbard Archipelago
Billefjorden
Petuniabukta
Online Access:https://biblio.ugent.be/publication/6929011
http://hdl.handle.net/1854/LU-6929011
https://doi.org/10.11646/phytotaxa.226.1.6
https://biblio.ugent.be/publication/6929011/file/7051685
Description
Summary:During a survey of the freshwater littoral diatom flora from lakes and ponds in the region of Petuniabukta on Spitsbergen (Svalbard Archipelago, High Arctic region), a new Achnanthidium species, A. petuniabuktianum sp. nov., has been recorded. Achnanthidium petuniabuktianum is a new representative of the A. pyrenaicum group as evidenced by its curved distal raphe fissures. The present paper describes in detail the morphology of A. petuniabuktianum based on light and scanning electron microscopy. The new taxon is characterized in having linear valves with parallel margins and broadly rounded, never protracted apices and a characteristic—in light microscopy hardly discernible—striation pattern consisting of very short striae composed of one or two small, always slit-like areolae. Based on current results, Achnanthidium petuniabuktianum is a benthic taxon occurring in epilithic and epiphytic habitats in the littoral zones of freshwater lakes and ponds.

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