153,303 species and infraspecific names are in the database, 20,952 images, 59,280 bibliographic items, 409,170 distributional records.

Martensia K.Hering, 1841, nom. cons.

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Delesseriaceae
Subfamily Nitophylloideae
Tribe Martensieae

Holotype species: Martensia elegans Hering

Original publication and holotype designation: Hering, [K.] (1841). Diagnoses algarum novarum a cl. Dre. Ferdinand Krauss in Africa Australi lectarum. Annals and Magazine of Natural History [Series 1] 8: 90-92.
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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: Wynne, M.J. (2014 '2013'). The red algal families Delesseriaceae and Sarcomeniaceae. pp. [1]-326, 118 figs. Königstein: Koeltz Scientific Books.

Nomenclatural notes
Named for George Matthias von Martens (1788-1872), German botanist. - (8 Oct 2018) - M.D. Guiry

Description: Thallus with thin membranous blades when young, developing a reticulum distally that can extend to the margins or terminate submarginally. Growth by means of a marginal row of obliquely dividing apical cells; new blades occasionally proliferating from the terminal margin, resulting in membranous regions alternating with mesh-like regions. Membranous portion with 1–5 cell layers; veins lacking; margins smooth or denticulate. Spermatangia in small sori on the network or the membranous blades. Cystocarps borne on the network or marginal membranous portion, with a distinct ostiole; carposporangia solitary or in chains of 2 or 3, terminating gonimoblast filaments. Tetrasporangia in small sori on membranous and network partitions, tetrahedrally divided.

Information contributed by: Huisman & S.-M.Lin (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 25 species names in the database at present, of which 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.

References
Huisman, J.M. & Lin, S.-M. (2018). Delesseriaceae. In: Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. (Huisman, J.M. Eds), pp. 437-476. Canberra & Melbourne: ABRS & CSIRO Publishing.

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: 08 October 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=35549

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 October 2018.

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