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A type study and emended description of Haslea wawrikae (Bacillariophyta)

FRITHJOF A.S. STERRENBURG, FRIEDEL HINZ, Paul E Hargraves

Abstract


Type slides and the last remnant of the type sample of Haslea wawrikae were examined in LM and SEM. An emended diagnosis is presented, one new finding being that the transverse bars of the basal layer on either side of the raphe are offset—the bars on the one side aligning with the areolar foramina on the other. The species is confirmed (SEM) to have a fully developed raphe and the valve structure characterising Haslea species: an internal “grate-like” basal layer and an external tegumental layer with continuous longitudinal fissures. An erroneous identification of H. wawrikae was traced in the literature and the existence of similar, but non-conspecific, species is suspected.


Keywords


type sample, Haslea, SEM, Algae, USA

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DOI: http://dx.doi.org/10.11646/phytotaxa.226.2.8

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand