Prescottiella C.E.M.Bicudo ex Levanets & Janse van Vuuren, 2023

Holotype species: Prescottiella sudanensis Grönblad, Prowse & A.M.Scott ex Levanets & Janse van Vuuren

Original publication and holotype designation: Janse van Vuuren, S. & Levanets, A. (2023). Validation of the generic name Prescottiella gen. nov. (Desmidiales, Zygnematophyceae): a rare African desmid. African Journal of Aquatic Science 2023: [1-6], 2 figs, 1 table.

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Description: Cells small, asymmetrical, slightly longer than broad, deeply constricted, inner part of sinus linear after which it suddenly opens widely. Semicells different from each other, trilobulate; lobes bifid with one long spine which is strongly curved and another short one which is not or only very slightly curved; all spines solid with an excavated base. Polar lobe in one semicell with apical spines curved strongly, almost vertically upwards; lower spines of polar lobe short and directed obliquely upwards; lateral lobes with one long upwardly curved spine and another shorter, almost straight one at the sinus directed obliquely upwards. The other semicell with a similar polar lobe but the apical spines are long and strong, being curved widely outwards, the lower spines short and directed obliquely outwards; lateral lobes with a long slightly upwardly curved spine nearest to the isthmus and another short and almost straight spine directed obliquely outwards. Chromatophores axile with a few scattered pyrenoids. Cell wall densely and minutely porose (= punctate). Vertical view fusiform, thicker at the middle, attenuated towards the poles which are cuspidate; polar lobe obliquely twisted.

Information contributed by: Original description (Levanets & Janse van Vuuren 2023). The most recent alteration to this page was made on 2023-12-06 by M.D. Guiry.

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

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Bicudo, C.E.M. (1976). Prescottiella, a new genus of asymmetrical desmids (Chlorophyceae). Journal of Phycology 12(1): 22-24, 3 figures.

Comments: Prescottiella was described from Lake Ambadi, Sudan; also found in lakes in South Africa.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47156

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 December 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024