Virescentia (Sirodot) Necchi, D.C.Agostinho & M.L.Vis, 2018

Holotype species: Virescentia helminthosa (Bory) Necchi, Agostinho & M.L.Vis

Original publication and holotype designation: Necchi, O., Jr, Agostinho, D.C. & Vis, M.L. (2018). Revision of Batrachospermum section Virescentia (Batrachospermales, Rhodophyta) with the establishment of the new genus, Virescentia stat. nov.. Cryptogamie Algologie 39(3): 313-338, 32 figs, 1 table.

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Description: Plants monoecious, dioecious, or polyecious, greenish, greenish-blue, or less often brownish, consistency mucilaginous; branching irregular or less often pseudo-dichotomous; whorls well developed, contiguous or separated, obconic, pear-shaped, spherical or barrel-shaped; cortical filaments of the main axis well developed with cylindrical cells; primary fascicles formed by cells variable in shape and length the fascicle, ranging from cylindrical to ellipsoidal, obovoidal or pear-shaped or audouinelloid; secondary fascicles few and sparse to abundant and covering the entire internode; spermatangia on primary or secondary fascicles; carpogonial branches well differentiated from the fascicles, straight, rarely curved, developing from the periaxial or proximal cells of primary fascicles, rarely from distal cells of primary fascicles, secondary fascicles, or cortical filaments, short or long, composed of disc- or barrel-shaped cells; involucral filaments, short, composed of cylindrical, ellipsoidal, or spherical cells; carpogonia with stalked, rarely shortly stalked, cylindrical, sub-cylindrical, clavate or ellipsoidal trichogynes; carposporophytes axial, hemispherical or spherical, inserted within the whorls, 1–2, rarely 3, per whorl, large; gonimoblast filaments densely arranged, composed of cylindrical, ellipsoidal, or barrel-shaped cells; carposporangia small or large, obovoidal, pear-shaped, clavate, or ellipsoidal.

Information contributed by: Vis & Necchi (2021: 308). 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=52601

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 04 December 2024