Dipterosiphonia F.& , 1897
Holotype species: Dipterosiphonia dendritica (C.Agardh) F.Schmitz
Original publication and holotype designation: Schmitz, F. & Falkenberg, P. (1897). Rhodomelaceae. 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. 421-480. Leipzig: verlag von Wilhelm Engelmann.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Díaz-Tapia, P., Maggs, C.A., West, J.A. & Verbruggen, H. (2017). Analysis of chloroplast genomes and a supermatrix inform reclassification of the Rhodomelaceae (Rhodophyta). Journal of Phycology 53(5): 920-937, 2 figs.
Description: Thalli prostrate, distichously branched, polysiphonous with 4-10 uncorticated pericentral cells, the number sometimes variable within the same species. Thalli are dorsiventrally oriented with exogenously produced dimorphic lateral branches, 1) unbranched determinate and 2) branched and potentially indeterminate. Some branched laterals developing as main axes, spreading the thallus. Branching pattern basically with two successive segments having a lateral of each kind on one side, this pair alternating with another pair on the opposite side in the same sequence. One branch of a pair, usually the short, unbranched one, is formed in a more dorsal position between lateral pericentrals than the other. Branched trichoblasts produced only in distal regions of determinate laterals. Unicellular rhizoids produced from ventral pericentrals, cut off from pericentral cell. Life history isomorphic; reproductive structures located on short lateral branchlets. Tetrasporangial stichidia, usually distal; tetrasporangia, 1 in each segment, in a short straight series of up to 9; stichidia often with curved tip. Male capitula replacing trichoblasts on short determinate laterals, ovaliform, with a sterile tips. Procarps on modified trichoblasts, distal on determinate branchlets on either main axis or indeterminate laterals. Supporting cell bears a 4-celled carpogonial branch and a single sterile group. Cystocarps ovoid to urceolate, with prominent ostioles.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 17 May 2019 by M.D. Guiry.
Comments: Usually epiphytic on larger algae, in most warm temperate to tropical regions throughout the world.
Numbers of names and species: There are 8 species names in the database at present, as well as 1 infraspecific names. Of the species names, 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.
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: 28 December 2000 by M.D. Guiry
Verified by: 17 May 2019 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33324
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 17 November 2019.