Psilosiphon Entwisle, 1989

Holotype species: Psilosiphon scoparius Entwisle

Original publication and holotype designation: Entwisle, T.J. (1989). Psilosiphon scoparium gen. et sp. nov. (Lemaneaceae), a new red alga from south-eastern Australian streams. Phycologia 28: 469-475.

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Description: thalli cartilaginous, pseudoparenchymatous, tubular; olive-green; narrow at the base, gradually becoming wide (unstalked) with no division into node and internode regions; unbranched, but sometimes with branching near base. Putative spermatangia, no carpogonia observed. Cortex composed of ellipsoidal to obovoidal photosynthetic cells of uniform size in distinct outward radiating rows or filaments; dense medullary filaments composed of cylindrical cells, colorless, in between the outer cortex and the uniaxial central filament. Reproduction by putative monosporangia formed in chains from the cortical filaments on the outside of the thallus or adventitious plantlets.

Information contributed by: Vis & Necchi (2021: 141). The most recent alteration to this page was made on 2022-04-13 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 masculine.

Most recent taxonomic treatment adopted: Vis, M.L. & Necchi, O., Jr. (2021). Subphylum Eurhodophytina, Class Florideophyceae, Subclass Nemaliophycidae, Order Batrachospermales. In: Freshwater red algae Phylogeny, taxonomy and biogeography. ( Eds), pp. 129-332. Cham: Springer [Springer Nature Switzerland AG].

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42777

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 13 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024