156,011 species and infraspecific names are in the database, 21,990 images, 60,295 bibliographic items, 442,406 distributional records.

Stylonema Reinsch, 1875

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Proteorhodophytina
Class Stylonematophyceae
Order Stylonematales
Family Stylonemataceae

Holotype species: Stylonema cornu-cervi Reinsch

Original publication and holotype designation: Reinsch, P.F. (1875 '1874/75'). Contributiones ad algologiam et fungologiam. Vol. 1 pp. [i]-xii, [1]-103, [104, err.], 131 plates [I-III, IIIa, IV-VI, VIa, VII-XII, XIIa, XIII-XX, XXa, XXI-XXXV, XXXVa, XXXVI (Melanophyceae); I-XLII, XLIIa, XLIII-XLVII, XLVIIa, XLVIII-LXI (Rhodophyceae); I-XVIII (Chlorophyllophyceae); I-IX (Fungi)]. Norimbergae [N├╝rnberg]: Typis Theodor Haesslein.
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Taxonomic status: currently recognized as a distinct genus.

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.

Description: Thallus minute, consisting of cells embedded in a mucilaginous sheath. May be uniseriate or pleuriseriate, forming pseudofilaments that may be unbranced, pseudodichotomously branched, or forming a monostromatic foliose blade. Each cell with a single stellate chloroplast with large central pyrenoid. Contains B-Type II phycoerythrin. Pit plugs absent. Growth is intercalary or diffuse, except in early stages of development following spore germination when growth may be apical. Attached to the substratum by an unmodified or slightly enlarged basal cell. Asexual reproduction by archeospores formed when entire vegetative cells are transformed into archeosporangia with each releasing a single, wall-less archeospore. Release occurs by the archeospore either moving through the surrounding sheath or by the dissolution of the sheath. Sexual reproduction unknown. Usually growing epiphytically on other algae or seagrasses, or epizoically on invertebrates to depths of 40 m. Cosmopolitan, being widely distributed in temperate and tropical waters.

Information contributed by: M. Hawkes. The most recent alteration to this page was made on 19 Jan 2017 by M.D. Guiry.

Comments: Due to the simple morphology of this putatively ancient rhodophyte further study is needed to determine if the genus as currently composed is a monophyletic group.

Numbers of names and species: There are 22 species names in the database at present, as well as 3 infraspecific names. Of the species names, 19 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: 28 December 2000 by M.D. Guiry

Verified by: 19 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32932

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 20 August 2019.

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