Petalonia Derbès & Solier, 1850, nom. cons.
Holotype species: Petalonia debilis (Kützing) Derbès & Solier
Currently accepted name for the type species: Petalonia fascia (O.F.Müller) Kuntze
Original publication and holotype designation: Derbès, [A.A.] & Solier, [A.J.J.] (1850). Sur les organes reproducteurs des algues. Annales des Sciences Naturelles, Botanique, Troisième série 14: 261-282, pls 32-37.
Description: Thalli erect, gregarious, leaf-like, compressed, generally flattened, linear to lanceolate or oblanceolate; entire, generally unbranched, old thalli sometimes perforated or torn at the apical portion; hollow to partially hollow to solid. Medulla typically interspersed with rhizoidal filaments. Plurangia occurs extensively throughout the thallus, sometimes in sori; generally biseriate, closely packed, covered with cuticle; paraphysis (ascocyst) may be present. Prostrate sporophytic thalli Stragularia-like, only bear unangia.
Information contributed by: "Expanded description" by Santiañez (2018). The most recent alteration to this page was made on 2022-08-12 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: Santiañez, W.J.E. (2018). Taxonomic and molecular phylogenetic studies in the Scytosiphonaceae (Ectocarpales, Phaeophyceae) Dissertation. pp. -120. Sapporo: Department of Natural History Sciences Graduate School of Science Hokkaido University.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=65
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 12 August 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 02 October 2023