Gazzaea C.W.Schneider & C.E.Lane, 2020

Holotype species: Gazzaea flookii (C.W.Schneider & C.E.Lane) C.W.Schneider & C.E.Lane

Original publication and holotype designation: Schneider, C.W., Lane, C.E., McDevit, D.C. & Filloramo, G.V. (2020). Proposal of the new genus Gazzaea (Rhodymeniaceae, Rhodophyta) to accommodate Botryocladia flookii C.W.Schneider & C.E.Lane. Notulae Algarum 153: 1-4, 1 fig.

Description: Plants composed of one to many, small to large mucilage-filled vesicles on short, simple and solid stipes attached by small discoid holdfasts; vesicles elongate to obovoid and slightly bending during development, producing lateral attachments to adjacent vesicles; vesicle walls multilayered with pigmented cortical layers and hyaline medullary cells, the larger medullary cells ultimately projecting into the inner vesicle cavity and producing one to many pyriform to obovoid secretory cells; outer cortex surface initially incomplete, becoming nearly complete at maturity; gametophytes and tetrasporophytes isomorphic; tetrasporangia formed in scattered discrete sori in the outer cortex, spherical to subspherical, cruciately arranged; gametophytes monoecious, spermatangia scattered on outer cortical cells and ostiolate cystocarps scattered on vesicles, slightly protruding from the exterior of the vesicle; carposporangia subglobose, obovoid to irregularly angled.

Information contributed by: Original description.. The most recent alteration to this page was made on 2022-04-06 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.

Comments: Gazzaea is genetically distinct from the morphologically similar saccate genus, Irvinea Guiry in Saunders & al. (1999: 36) (Schneider & Lane 2008, Schmidt & al. 2017). Irvinea develops vesicles from a branched stoloniferous holdfast that coalesces to form a discoidal structure that emits additional axes bearing vesicles, has secretory cells borne exclusively on morphologically smaller specialized medullary cells, and develops dioecious gametophytes (Saunders & al. 1999, Wilkes & al. 2006). Other than Irvinea spp. and Botryocladia macaronesica, there are also several short-stalked, few- and large-vesicled Botryocladia spp. [e.g., B. chiajeana (Meneghini) Kylin, B. darwinii C.W.Schneider & C.E.Lane, B. fernandeziana Levring, B. ganesanii Aponte Díaz, B. senegalensis G.Feldmann & Bodard] and Chrysymenia brownii (Harvey) De Toni that have a similar habit to G. flookii, and all are distinguished by a suite of anatomical differentiating characteristics.

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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=52812

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 April 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024