Published May 15, 2026 | Version v1
Taxonomic treatment Open

Proschkinia complanatula D. G. Mann

  • 1. Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada & Advanced Microscopy Facility, Bob Wright Centre, University of Victoria, Victoria, Canada
  • 2. Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada
  • 3. Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, Canada
  • 4. Hakai Institute, Heriot Bay, Canada & Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, Canada
  • 5. University of Alberta, Edmonton, Canada & Institute for Multidisciplinary Ecological Research in the Salish Sea, Galiano Island, Canada

Description

Proschkinia complanatula (Hustedt ex Simonsen) D. G. Mann

Amphora complanata Grunow 1867: 25 — Van der Werff and Huls (1975): P. D G XVI. 109; Guiry and Guiry (2025).

Navicula complanatula Hustedt ex Simonsen (1987): 479, pl. 735, figs. 1–10.

Proschkinia complanatula — Mann 1990: 675, in Round et al. (1990): 596, 597; Majewska et al. (2019); Kim et al. (2020): 10 –12, fig. 4; Plinski and Witkowski (2020): 115, 324, fig. 576.

Description

Cells solitary, usually positioned in girdle view, rectangular with rounded corners and with numerous, moderately broad bands, 9 (7–8) in 10 µm. Valves lanceolate, slightly arched, with acutely rounded apices, length 64.7 (30–58) µm, width 7.4 (5.5–8.0) µm. Raphe straight and linear with proximal ends close and distal ends strongly hooked. Transapical uniseriate striae parallel at centre, 18 (12–17) in 10 µm, becoming slightly convergent and denser near apices, 22 (17–20) in 10 µm. Central area asymmetric with striae more distant than towards the apices, producing a stauros-like structure. Fistula located in central area on primary side of valve.

Notes

iNaturalist ID: 188679253 (Fig. 30).

Notes

Published as part of Webber, Mark, Humphrey, Elaine, van Asselt, Arjan, Chang, Alice, Morien, Evan & Simon, Andrew D. F., 2026, Diatoms (Bacillariophyta) of the Salish Sea, Northeast Pacific: annotated checklist and new species reports, pp. e 189060 in Biodiversity Data Journal 14 on page e189060, DOI: 10.3897/BDJ.14.e189060

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Linked records

Additional details

Biodiversity

Scientific name authorship
D. G. Mann
Kingdom
Chromista
Phylum
Ochrophyta
Order
Naviculales
Family
Proschkiniaceae
Genus
Proschkinia
Species
complanatula
Taxon rank
species

References

  • Grunow A. 1867 Diatomeen auf Sargassum von Honduras, gesammelt von Linding Hedwigia 6 1-3
  • Van der Werff A., Huls H. 1975 Diatomeeënflora van Nederland Drukkerij Sprey Abcoude The Hague, Netherlands 738
  • Guiry M. D., Guiry G. M. AlgalBase https://www.algaebase.org2025-10-20T00:46:21+00:00
  • Simonsen R. 1987 Atlas and catalogue of the diatom types of Friedrich Hustedt. Volume 1: Catalogue of Hustedt's diatom types. Volume 2: Atlas of Hustedt's diatom types, pls. 1–395. Volume 3: Atlas of Hustedt's diatom types, pls. 396–772 J. Cramer, Berlin – Stuttgart, Germany, 1,741 pp
  • Round F. E., Crawford R. M., Mann D. G. 1990 The diatoms: biology and morphology of the genera Cambridge University Press Cambridge, UK 747
  • Majewska R., Bosak A., Frankovich T. A., Ashworth M. P., Sullivan M. J., Robinson N. J., lazo-Wasem E. A., Pinou T., Nel R., Manning SR., Van de Vijver B. 2019 Six new epibiotic Proschkinia (Bacillariophyta) species and new insights into the genus phylogeny European Journal of Phycology 54 4 609 631 10.1080/09670262.2019.1628307
  • Kim S. Y., Witkowski A., Park J. G., Gastineau R., Ashworth M. P., Kim B. S., Mann D. G., Li C., Igersheim A., Plocinski T., Yoo Y. D., Chung S. O., Theriot E. C. 2020 The taxonomy and diversity of Proschkinia (Bacillariophyta), a common but enigmatic genus from marine coasts Journal of Phycology 56 4 953 978 10.1111/jpy.12998
  • Plinski M., Witkowski A. 2020 Diatoms from the Gulf of Gdańsk and surrounding waters (the southern Baltic Sea): a key to the identification of the species Gdańsk University Press Gdańsk, Poland 442