Herposiphonia Nägeli, 1846

Lectotype species: Herposiphonia tenella (C.Agardh) Ambronn

Currently accepted name for the type species: Herposiphonia secunda f. tenella (C.Agardh) M.J.Wynne

Original publication: Nägeli, C. (1846). Über Polysiphonia und Herposiphonia. Zeitschrift für wissenschaftliche Botanik 4: 207-256, pls VI, VII, VIII.

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Type designated in: Schmitz, F. (1889). Systematische Übersicht der bisher bekannten Gattungen der Florideen. Flora oder Allgemeine botanische Zeitung 72: 435-456, pl. XXI.

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Description: Thallus small, commonly epiphytic, with prostrate and erect axes. Prostrate axes indeterminate, giving rise to a regular sequence of determinate simple or sparingly branched erect axes and indeterminate axes. Many species with 3 determinate branches between indeterminate branches, the latter arising on alternate sides, dorsiventral, with circinate apices, curving away from the substratum. Determinate branches generally short and of uniform length, with straight apices, occasionally with deciduous trichoblasts. Structure polysiphonous, terete, ecorticate, with 4–many pericentral cells (number usually variable between prostrate and erect portions); attached by rhizoids cut off from ventral cells. Reproductive structures only on determinate axes. Spermatangial branches replacing or borne on trichoblasts, cylindrical. Cystocarps on epibasal segments of trichoblasts which are terminal or subterminal on determinate axes. Tetrasporangia 1 per segment, usually in straight series, occasionally spirally arranged.

Information contributed by: Huisman (2018). The most recent alteration to this page was made on 2018-10-09 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: Díaz-Tapia, P., Maggs, C.A., West, J.A. & Verbruggen, H. (2017). Analysis of chloroplast genomes and a supermatrix inform reclassification of the Rhodomelaceae (Rhodophyta). Journal of Phycology 53(5): 920-937, 2 figs.

Comments: Saxicolous or epiphytic, intertidal, subtidal (known to occur to 75 m) in temperate to tropical parts of all ocean systems.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=33325

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 09 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024