153,631 species and infraspecific names are in the database, 20,983 images, 59,437 bibliographic items, 412,634 distributional records.

Polyporolithon L.R.Mason, 1953

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Corallinophycidae
Order Hapalidiales
Family Hapalidiaceae
Subfamily Melobesioideae

Holotype species: Polyporolithon conchatum (Setchell & Foslie) L.R.Mason

Currently accepted name for the type species: Mesophyllum conchatum (Setchell & Foslie) W.H.Adey

Original publication and holotype designation: Mason, L.R. (1953). The crustaceous coralline algae of the Pacific coast of the United States, Canada and Alaska. University of California Publications in Botany 26: 313-389, Plates 27-46.

Precise date of publication14 January 1953 (stated on obverse of inside cover page of paper). The requirements for valid publication are specified in the ICBN (International Code of Botanical Nomenclature).

Taxonomic status: currently regarded as a synonym of Mesophyllum.

Nomenclatural notes
The ICBN rules cited below are those adopted by the Seventeenth International Botanical Congress, Vienna, Austria, July 2005 (McNeill et al. 2006).

In accordance with ICBN 13.3, the name Polyporolithon is treated as pertaining to a non-fossil taxon because its type is based on a non-fossil specimen. No species based on fossil types have been assigned to the genus.

The generic name Polyporolithon is typified (ICBN Art 10.1) by the type of P. conchatum, the designated holotype species and one of 3 species originally (Mason 1953) included in the genus. - (20 Jul 2009) - M.D. Guiry

Description: No description is provided as Polyporplithon is currently included in synonymy.

Information kindly contributed by Wm. J. Woelkerling but may now be outdated.

Comments: Mason (1953) explicitly designated P. conchatum as type species of Polyporolithon. Adey (1970: 23, 27) concluded from an examination of the lectotype specimen (TRH B17-2541; see Woelkerling et al. 2005: 340) of P. conchatum that it belonged to the genus Mesophyllum. This was subsequently confirmed by Athanasiadis et. al. (2004: 140-146, figs 54-91), who provided a detailed accounts of the lectotype and the species as a whole. Consequently, Polyporolithon Mason (1953) is treated as a heterotypic synonym of Mesophyllum Lemoine (1928).

Numbers of names and species: There are 4 species names in the database at present.

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
Adey, W.H. (1970). A revision of the Foslie crustose coralline herbarium. Det Kongelige Norske Videnskabers Selskabs Skrifter 1: 1-46, 13 figs.

Athanasiadis, A., Lebednik, P. & Adey, W.H. (2004). The genus Mesophyllum (Melobesioideae, Corallinales, Rhodophyta) on the northern Pacific coast of North America. Phycologia 43: 126-165.

Foslie, M. (1902). New species or forms of Melobesieae. Det Kongelige Norske Videnskabers Selskabs Skrifter 1902(2): 1-11.

Lemoine, M. (1928). Un nouveau genre de Mélobésiées: Mesophyllum. Bulletin de la Société Botanique de France 75: 251-254.

Mason, L.R. (1953). The crustaceous coralline algae of the Pacific coast of the United States, Canada and Alaska. University of California Publications in Botany 26: 313-389, Plates 27-46.

McNeill, J., Barrie, F.R., Burdet, H.M., Demouline, V., Hawksworth, D.L., Marhold, K., Nicolson, D.H., Prado, J., Silva, P.C., Skog, J.E., Wiersema, J.H. & Turland, N.J. (2006). International Code of Botanical Nomenclature (Vienna Code) adopted by the Seventeenth International Botancial Congress Vienna, Austria, July 2005. pp. [i-iv], v-xviii + 1-568. Liechtenstein: A.R.G. Gantner Verlag.

Woelkerling, W.J., Gustavsen, G., Myklebost, H.E., Prestø, T., Såstad, S.M. (2005). The coralline red algal herbarium of Mikael Foslie: revised catalogue with analyses. Gunneria 77: 1-625.

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

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Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 November 2018.

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