Agardhiella F.Schmitz, 1897

Holotype species: Agardhiella tenera (J.Agardh) F.Schmitz

Currently accepted name for the type species: Agardhiella subulata (C.Agardh) Kraft & M.J.Wynne

Original publication and holotype designation: Schmitz, F. & Hauptfleisch, P. (1897). Rhodophyllidaceae. In: Die natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten insbesondere den Nutzpflanzen unter Mitwirkung zahlreicher hervorragender Fachgelehrten, Teil 1, Abteilung 2. (Engler, A. & Prantl, K. Eds), pp. 366-382. Leipzig: verlag von Wilhelm Engelmann.

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Description: Plants reach 30 cm in length, are erect from a discoid holdfast, and are terete and irregularly and radially branched. Apices incorporate a limited number of apical cells whose successive derivatives cut off a single periaxial cell in orthostichous rows. Supporting cells of carpogonial branches are homologous to auxiliary cells, the auxiliary cell plus the 3-4 cortical cells pit-connected to it appearing enlarged and darkly staining, forming a distinct "auxiliary cell complex". Generally two connecting filaments, one in open connection, the other pit-connected, arise from the fertilized carpogonium. Diploidization of an auxiliary cell results in growth of surrounding filaments into an involucre and division of the gonimoblast into a central tissue in which gametophytic and gonimoblastic cells make isolated fusions but do not incorporate into a central fusion cell. Carposporangia form in short (1-3) unbranched files. 1-2 spermatangia are cut off from each of the 1-2 mother cells borne on outer cortical bearing cells over wide surfaces of the fronds. Tetrasporangia are cut off laterally from bearing cells. The vegetative and reproductive structure of Agardhiella are detailed by Gabrielson and Hommersand (1982), who establish the Tribe Agardhielleae for it.

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 2017-01-23 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Comments: Distribution: The type species occurs intertidally from Massachusetts to Brazil in the western Atlantic and from Texas and numerous islands of the West Indies in the Caribbean Sea.

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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=37724

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 23 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024