Visia Necchi, 2019

Holotype species: Visia cayennensis (Montagne ex Kützing) Necchi & A.García

Original publication and holotype designation: Necchi, O., Jr, García Filho, A. & Paiano, M.O. (2019). Revision of Batrachospermum sections Acarposporophytum and Aristata (Batrachospermales, Rhodophyta) with the establishment of the new genera Acarposporophycos and Visia. Phytotaxa 395(2): 51-65, 7 fig., 1 table.

Description: plants monoecious, dioecious, or polyecious, greenish, greenish-blue, or less often brownish, consistency mucilaginous; branching irregular; whorls well developed, contiguous or separated, barrel-shaped, obconic, or spherical; cortication of the main thallus axis well developed with filaments of cylindrical cells; primary fascicles formed by non-audouinelloid cells, ranging from cylindrical to elliptical, obovoid or spherical, or audouinelloid cells (cylindrical or barrel-shaped) in a single species; secondary fascicles abundant and covering half to the entire internode or few and sparse in a single species; spermatangia spherical or obovoidal, on primary or secondary fascicles; carpogonial branches well differentiated from the fascicles, straight or slightly curved, typically long, developing from the periaxial, rarely from proximal cells of primary fascicles, composed of disc-, barrel-shaped or cylindrical cells; involucral filaments long (proximal part) or short (distal part), composed of cylindrical, ellipsoidal, fusiform, barrel-shaped, obovoidal, or sub-spherical cells; carpogonia with unstalked, clavate or elongate-clavate, rarely undulated trichogynes; carpogonia becoming swollen and divided endogenously after fertilization in one species; carposporophytes pedunculate or short-pedunculate, spherical or sub-spherical, 1-3 per whorl, small; gonimoblast filaments densely arranged, composed of cylindrical or barrel-shaped cells; carposporangia obovoidal or clavate.

Information contributed by: Vis & Necchi (2021: 317-318). The most recent alteration to this page was made on 2022-04-21 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=52680

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 05 May 2024