Phaeostromatella P.J.L.Dangeard, 1970

Holotype species: Phaeostromatella elegans P.J.L.Dangeard

Original publication and holotype designation: Dangeard, P.J.L. (1970). Sur un genre nouveau d'Ectocarpale (Myrionémacée) Phaeostromatella nov. gen. (Phaeostromatella elegans nov. sp.). Compte Rendu Hebdomadaire des Séances de l'Académie des Sciences. Paris. Série D 270: 1678-1680, 1 fig., 2 pls [I, II].

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Precise date of publication: 1 April 1970

Description: Thallo repente, adsubstratum lateexpanso, stellifico aut inaequaliter ambitu, usque ad 1 mm lato, filamentis prostratis, ramosis, ad marginem liberis, ad centrum inter se coalitis, stratum monostromaticum,formantibus. Ramis praecipuis,distinctis, sub apicem. crescentis, pennatis. Cellulis valde coloratis, chromatophoris satis multis (2-5). Pili basi meristemo, sed non vagina, instructi, adsunt. Sporocystis pluriloculariis ad centralem partem aut ad stromatosas regiones, saepe dense congestis, ectocarporum istis similibus, erectis, sessilibus, aut interdum lateraliter, obliquiter, horizontaliter in ramuli loco dispositis. Zoosporis in germinationesplus minusve cito in disco confluentes evolutis.

Information contributed by: Original description and P. M. Pedersen. The most recent alteration to this page was made on 2023-07-26 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: 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.

Comments: This genus was erected to accommodate a monostromatic plant with a syntagmatic central part and a margin of free filaments. The genus lacks upright assimilating filaments, those being formed are transformed into plurilocular sporangia. True hairs are present, presumably without a basal sheath. Pedersen (1984) discussed the justification of this genus which in vegetative characteristics is very close to for example Hecatonema. If further studies show that Phaeostromatella is an independent genus, it seems to find a natural placing in the Punctariaceae considering the fact that sheathed hairs may be difficult to observe unless material with hairs in many different stages of development is available.

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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=38295

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 26 July 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024