Pulchellophycus Edlund & M.J.Wynne, 2019

Holotype species: Pulchellophycus kriegerianus (Krasske) Edlund & M.J.Wynne

Original publication and holotype designation: Edlund, M.B. & Wynne, M.J. (2019). Pulchellophycus gen. nov.: a validation of “Pulchella” Krammer (Naviculaceae, Bacillariophyta). Notulae Algarum 100: 1-4, no figs.

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Description: Frustules naviculoid, symmetrical in apical, transapical, and pervalvar axes, rarely dorsiventral. Valves linear to linear-lanceolate, ends rounded to rostrate. Intercalary bands narrow, septae absent. Valve face flat. The valve face-mantle junction is sharply bent, valve mantle shallow. Submarginal rows of large, round to apically elongated foramina run along both external sides of the valve face, about 10-13/10 µm. In the valve interior, submarginal rows of foramina are aligned similarly to external foramen but separated by marginal costae. Foramen open into submarginal longitudinal alveolae of about 1/3 to 1/5 the breadth of the valve. Axial area narrow to broad, if narrow central valve face covered in indistinct, uniseriate parallel striae that are often interrupted and composed of irregular transapically elongate areolae. Internal openings of striae similarly irregular and interrupted. Central area continuous with axial area or small and rhombic in striated valves. Raphe branches filiform, proximal ends closely spaced and unilaterally deflected opposite to terminal ends that internally terminate in small helictoglossae.

Information contributed by: Original description; modified from Krammer (2000: 204-205) and emended from Kociolek et al. (2014: 35).. The most recent alteration to this page was made on 2019-05-17 by Salvador Valenzuela Miranda.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as masculine.

Comments: In contrast to Pulchellophycus, Biremis D.G.Mann & E.J.Cox (in Round et al. 1990: 664) has an arched valve face, a rounded valve face-mantle junction and submarginal alveolate striae that are each internally occluded by a large poroid cribrum located at the valve face-mantle junction. Pulchellophycus is ecologically restricted to low-productivity fresh waters (Krasske 1939, 1943, Kulikovskiy et al. 2012., Kociolek et al. 2014), whereas Biremis taxa are distributed in fresh to brackish waters (Round et al. 1990, Edlund et al. 2001).

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=52687

Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 17 May 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 04 March 2024

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