Alethocladus Sauvageau, 1903

Holotype species: Alethocladus corymbosus (Dickie) Sauvageau

Currently accepted name for the type species: Halopteris corymbosa (Dickie) Draisma, Prud'homme & H.Kawai

Original publication and holotype designation: Sauvageau, C. (1903). Remarques sur les Sphacélariacées. Journal de Botanique [Morot] 17: 332-353.

Description: Plants forming ca. 5 cm tall tufts composed of dark brown, wiry, erect axes and laterals. Basal parts unknown. Erect first-order laterals filamentous, terete, articulated, isodiametric, bushy, with acrohomoblastic, rarely acroheteroblastic, distichous-alternately branched second and third order laterals. Forming one lenticular branch initial from each conspicuous cylindrical apical cell before a segment is cut off. Segments each dividing transversely once preceeding frequent longitudinal and transverse segmentation. Corticating rhizoids frequent. Hairs not observed. Reproductive structures unknown.

Information kindly contributed by Prud'homme van Reine but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Halopteris.

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Draisma, S.G.A., Prud'homme van Reine, W.F. & Kawai, H. (2010). A revised classification of the Sphacelariales (Phaeophyceae) inferred from a psbC and rbcL based phylogeny. European Journal of Phycology 45(3): 308-326.

Comments: Probably distributed throughout southern high latitudes, mostly subantarctic. Genus of uncertain status, possibly synonymous with Stypocaulon Kützing.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 March 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 06 December 2022

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