155,127 species and infraspecific names are in the database, 21,785 images, 59,958 bibliographic items, 434,141 distributional records.

Acrosymphyton Sjöstedt, 1926

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Acrosymphytales
Family Acrosymphytaceae

Lectotype species: Acrosymphyton purpuriferum (J.Agardh) Sjöstedt

Original publication:Sjöstedt, L.G. (1926). Floridean studies. Acta Universitatis Lundensis 22(4): 1-95, 41 figs.

Type designated in Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Huisman, J.M. (2018). Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. pp. [i]-xii, 1-672, 189 figs. Canberra & Melbourne: ABRS & CSIRO Publishing.

Nomenclatural notes
Type selected by Kylin (1956: 151). - (23 Jan 2017) - M.D. Guiry

Taxonomic notes
Silva et al. (1996: 184) note that the family Acrosymphytaceae, comprising only Acrosymphyton, was segregated from the Dumontiaceae by Lindstrom (1987: 52) but that Womersley (1994: 220) decided not to recognize the new family, pointing out that some of the characters used to distinguish it differ only in degree from those found in the remaining genera of Dumontiaceae. - (16 Jun 2009) - Wendy Guiry

Description: Uniaxial, lubricous or mucilaginous, terete or slightly compressed. Axial cell with four determinate, pseudodichotomously branched laterals, terminal cells moniliform. Rhizoidal filaments present. Hairs reported. Pinkish red. Monoecious or dioecious. Carpogonium terminal on pinnately branched, distally recurved moniliform filament. One or more outgrowths of fertilized carpogonium contacting terminal cells of pinnate branches and sometimes other cells of carpogonial branch before initiating connecting filaments that contact a succession of terminal auxiliary cells on adventitious, usually unbranched, moniliform filaments. A single gonimoblast initial develops from connecting filament attached to auxiliary cell. Cystocarps small, compact, all cells maturing into relatively small carposporangia. No specialized nutritive tissue. Spermatangia superficial, one to several borne on each spermatangial mother cell. Tetrasporophyte, where known, heteromorphic, a Hymenoclonium-like crust. Tetrasporangia tetrahedral, produced under short-day conditions (night-breaks not inhibitory). Spore germination, one (or two) divisions within spore wall, then rhizoidal outgrowth, which becomes highly distichously branched.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 27 Sep 2018 by M.D. Guiry.

Comments: Subtidal. A spring-summer ephemeral of cobble substrata in warm temperate to tropical regions: Mediterranean, warm temperate to subtropical N Atlantic, Hawaii, Australia, New Zealand.

Numbers of names and species: There are 6 species names in the database at present, of which 6 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.

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: 27 September 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=34021

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 April 2019.

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