Sheathia Salomaki & M.L.Vis, 2014

Holotype species: Sheathia boryana (Sirodot) Salomaki & M.L.Vis

Original publication and holotype designation: Salomaki, E.D., Kwandrans, J., Eloranta, P. & Vis, M.L. (2014). Molecular and morphological evidence for Sheathia gen. nov. (Batrachospermales, Rhodophyta) and three new species. Journal of Phycology 50(3): 526-542.

Description: thalli dioecious or monoecious; olive-drab to dark blue-green, purple to reddish; consistency mucilaginous, branching irregular; whorls well developed, often >1 mm in diameter, contiguous or separate, spherical or barrelshaped; main axis covered by either heterocortication composed of both bulbous and cylindrical cells or homocortication composed of only cylindrical cells; primary fascicles with cells ranging from cylindrical to ellipsoidal and obovoidal or pear-shaped; secondary fascicles few and sparse or abundant and covering the entire internode in few species; spermatangia typically on primary or secondary fascicles, but can be at the tips of involucral filaments of the carpogonial branches; carpogonial branches (24.1–)45.0–87.6(–129.3) ?m in length, composed of cells similar to the fascicles, straight, developing from the periaxial, proximal cells of primary fascicles and occasionally from distal cells of primary fascicles; involucral filaments, short or long, composed of cylindrical or ellipsoidal cells; carpogonia with sessile, rarely shortly stalked, cylindrical, sub-cylindrical, club-shaped, lanceolate or ellipsoidal trichogynes; carposporophytes pedunculate, spherical, inserted within the whorls or exerted, small; gonimoblast filaments densely arranged, composed of 2–4(–5) barrelshaped to cylindrical cells; carposporangia small or large, spherical to obovoidal.

Information contributed by: Vis & Necchi (2021: 273). The most recent alteration to this page was made on 2022-04-20 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: 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=51658

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024