155,266 species and infraspecific names are in the database, 21,864 images, 60,052 bibliographic items, 435,064 distributional records.

Dasya C.Agardh, 1824, nom. cons.

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Dasyaceae
Subfamily Dasyoideae

Holotype species: Dasya pedicellata (C.Agardh) C.Agardh

Currently accepted name for the type species: Dasya baillouviana (S.G.Gmelin) Montagne

Original publication and holotype designation: Agardh, C.A. (1824). Systema algarum. pp. [i]-xxxvii, [1]-312. Lundae [Lund]: Literis Berlingianis [Berling].
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

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.

Nomenclatural notes
Pena-Martin et al. (Taxon. 2010: 1892) propose to conserve the name Dasya C. Agardh against Rhodonema G. Martens considering the wide use of this name for almost two centuries, and thereby avoiding the need for about 82 new combinations. They note that Naccari (1828) accepted Rhodonema over Dasya, arguing that Marten's genus was published several months earlier than Agardh's one. - (18 Jan 2011) - Wendy Guiry

Monotypic when first introduced. Orthography has been conserved. - (25 Jan 2017) - M.D. Guiry

Description: Thallus erect or decumbent, sparingly to profusely branched (many species villose); growth sympodial. Branching radial or secondarily bilateral; axes terete or flattened, with 4 or 5 pericentral cells cut off in a circular sequence, each segment bearing a persistent pseudolateral; axes corticated or not. Adventitious monosiphonous filaments present or absent, formed on pericentral cells, cortical cells and/or pseudolaterals. Spermatangial branchlets transforming from pseudolaterals. Carpogonial branches formed on third pericentral cell (of 5) of fertile segment. Cystocarp usually with an elongate ostiolate pericarp. Tetrasporangia in stichidia, tetrahedrally divided, 4–6 per segment; post-sporangial cover cells forming from fertile pericentral cell.

Information contributed by: Huisman (2018). The most recent alteration to this page was made on 8 Oct 2018 by M.D. Guiry.

Numbers of names and species: There are 195 species names in the database at present, as well as 49 infraspecific names. Of the species names, 91 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

References
Broadwater, S.T. & Scott, J.L. (1983). Fibrous vacuole associated organelles (FVAOs) in the Florideophyceae: a new interpretation of the 'appareil cinétique'. Phycologia 22: 225-233.

Broadwater, S.T., Scott, J.L. & Pobiner, B. (1986). Ultrastructure of meiosis in Dasya baillouviana (Rhodophyta). II Prometaphase I-telophase II and post-division nuclear behavior. Journal of Phycology 22: 501-512.

Broadwater, S.T., Scott, J.L. & Pobiner, B. (1986). Ultrastructure of meiosis in Dasya baillouviana (Rhodophyta). I. Prophase I1. Journal of Phycology 22: .

Dixon, P.S. & Irvine, L.M. (1970). Miscellaneous notes on algal taxonomy and nomenclature. III. Botaniska Notiser 123: 474-487, 3 figs.

Falkenberg, P. (1901). Die Rhodomelaceen des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes von Neapel, Monographie 26. pp. i-xvi, 1-754, 10 figs, 24 pls. Berlin.

Fenical, W. & McConnell, O. (1976). Simple antibiotics from the red seaweed Dasya pedicillata var stanfordiana. Phytochemistry 15: 435-436.

L'Hardy-Halos, M.-T. (1968). Sur la structure de la fronde chez les Dasyacées (Rhodophycées-Céramiales). Compte Rendu Hebdomadaire des Séances de l’Académie des Sciences. Paris. Série D 266: 1833-1835.

Parsons, M.J. (1975). Morphology and taxonomy of the Dasyaceae and the Lophothalieae (Rhodomelaceae) of the Rhodophyta. Australian Journal of Botany 23(4): 549-713, 49 figs, 1 table.

Richardson, J.P. (1981). Persistence and development of Dasya baillouviana (Gmelin) Montagne (Rhodophyceae, Dasyaceae) in North Carolina. Phycologia 20: 385-391.

Rosenberg, T. (1933). Zur Anatomie und Entwicklungsgeschichte von Dasya arbuscula. Botaniska Notiser 1933: 535-542.

Schneider, C.W., Walde, R.E. & Morelli, R.A. (1994). L-systems computer models generating distichous from spiral organisation in the Dasyaceae (Ceramiales, Rhodophyta). European Journal of Phycology 29: 165-170, 3 figs, 3 tables.

Silva, P.C. (1952). A review of nomenclatural conservation in the algae from the point of view of the type method. University of California Publications in Botany 25: 241-323.

Millar, A.J.K. (1996). Dasya roslyniae sp. nov. (Dasyaceae, Rhodophyta), with a discussion on generic distinctions among Dasya, Eupogodon, Rhodoptilum, and Pogonophorella. Journal of Phycology 32: 145-157, 32 figs.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 01 January 2001 by M.D. Guiry

Verified by: 25 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32783

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 May 2019.

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