Scoresbyella Womersley, 1987
Holotype species: Scoresbyella profunda Womersley
Original publication and holotype designation: Womersley, H.B.S. (1987). The marine benthic flora of southern Australia. Part II. pp. [1]-484, 169 figs, 1 table, 8 plates, 4 maps. Adelaide: South Australian Government Printing Division.
Request PDFDescription: Thalli erect from a rhizoidal holdfast, 6-19 cm long, complanate, dichotomous and becoming laterally branched. Frond mostly 5-10 mm broad but narrower at apices (3-5 mm) and base (1-3 mm). Growth initiated by a single apical cell in an apical depression, lenticular in surface view. Thallus cells thick near the apices with larger medullary cells and a single layer (becomes double) of cortical cells; in mid thallus with central layer of large medullary cells, 2 or smaller irregular medullary layers and a cortex of small densely pigmented cells. Older thallus parts 8-10 cells thick. Dense tufts of phaeophycean hairs developed from cortical cells. Cortical cells with numerous discoid chloroplasts without pyrenoids. Antheridial plants with scattered often confluent sori mostly 0.1-1.5 mm across, developed from cortical cells, and with surrounding sterile elongate paraphyses. Sporangial and oogonial plants unknown. The genus is known from few collections and one male plant. The antheridia are typical of the order Dictyotales. The single apical cell lies longtudinally and cuts of new cells laterally from the 2 faces not from the base as in the Dictyoteae. Further segmentation is similar to that in the Dictyoteae but later segmentation and cell arrangement becomes more irregular. On this basis, Womersley (1967) considered that Scoresbyella warranted placement in a separate family. An apparently rare alga recorded only from deep water in South Australia and Western Australia.
Information contributed by: R. J. King and J. A. Phillips. The most recent alteration to this page was made on 2024-04-14 by Salvador Valenzuela Miranda.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156, 1 fig., 1 table.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=42959
Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 14 April 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024
