Sellaphora blackfordensis D.G.Mann & S.Droop 2004

Publication Details
Sellaphora blackfordensis D.G.Mann & S.Droop 2004: 476, figs 4 g-i, 19, 33-37

Published in: Mann, D.G., McDonald, S.M., Bayer, M.M., Droop, S.J.M., Chepurnov, V.A., Loke, R.E., Ciobanu, A. & du Buf, J.M.H. (2004). The Sellaphora pupula species complex (Bacillariophyceae): morphometric analysis, ultrastructure and mating data provide evidence for five new species. Phycologia 43(4): 459-482, 52 figs, 4 tables.

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Publication date: 30 July, 2004

Type Species
The type species (lectotype) of the genus Sellaphora is Sellaphora pupula (Kützing) Mereschkovsky.

Status of Name
This name is of an entity that is currently accepted taxonomically.

Type Information
Holotype locality: Blackford Pond, Edinburgh, Scotland; (Mann & al. 2004: 476) Holotype: material of clone BLA17 (=B1 85) as preserved on slide E4701 (E); isolated 5 October 2004, from epipelon of soft mud (epitype) December '83; 70 m altitude; mud slurry from small, artificial, eutrophic lake fed by groundwater seepage and underwater springs; E; E16/4 (mud (tissue)) (Mann & al. 2004: 476, 460) Notes: Epitype (Evans & Mann 2009: 71, fig. 2).

General Environment
This is a freshwater species.

Description
The valves are narrowly elliptical with subcapitate ends, 19-57 µm long and 8.1-9.3 µm wide. The axial area is narrow and straight. The central area is a bow-tie-shaped subfascia; its outline is somewhat irregular, as a result of the presence of approximately alternate long and short striae. The areolae cannot be resolved in LM, but are ± circular or elliptical and equally spaced poroids, with a density of 55 in 10 µm transapically. The striae are radiate throughout, becoming almost parallel near the poles; their density is 18.3-22.1 in 10 µm. In LM, the polar bars appear angled out towards the poles. The raphe-sternum is elevated and prominent externally for almost the whole of its length. The raphe appears simple in LM and is threadlike and clearly undulate. The external central raphe endings are expanded and strongly deflected towards the primary side; the internal endings are also deflected towards the primary side. The terminal fissures are bent towards the secondary side; their curvature is complex, with inflections either side of where the polar bars lie internally (this subtlety was consistent between valves collected in Blackford Pond, Fenemere, and Figgate Loch). The helictoglossa is narrow and elongate.

Created: 20 November 2004 by Sandy Lawson.

Last updated: 20 March 2019

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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=65917

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 March 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024

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