154,917 species and infraspecific names are in the database, 21,111 images, 59,869 bibliographic items, 430,948 distributional records.

Pneophyllum Kützing, 1843

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Corallinophycidae
Order Corallinales
Family Hydrolithaceae
Subfamily Hydrolithoideae

Holotype species: Pneophyllum fragile Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. I. pp. [i]-xxxxviii, 1-762. Thessaloniki: Published and distributed by the author.

Nomenclatural notes
Monotypic when introduced. - (20 Jan 2017) - M.D. Guiry

Taxonomic notes
Neogoniolithoideae ? (Rösler et al., 2016: 421). - (15 Jul 2016) - Wendy Guiry

Description: Thalli comprising thin crusts <200 um thick and up to 2-3 (-5) cells thick in vegetative parts; some entities consisting of unconsolidated filaments (P. confervicolum f. minutulum). Epilithic or epiphytic on algae and seagrasses; adhering firmly by cell adhesion, lacking haustoria. Each spore germinating into an 8-celled sporeling from which the remainder of thallus is derived. Organized into two orders of filaments (dimerous), first-order filaments (primigenous filaments) producing a unistratose layer on a substrate and second-order filaments (postigenous filaments) growing from the first and oriented about at right angles to the substrate. Stratified elongate cells (palisade cells) lacking. Second-order filaments sometimes consisting only of single small epithallial cells (in which case thallus is only two cells thick). Outermost walls of epithallial cells rounded or flattened, not flared. Cells in contiguous filaments sometimes joined by fusions; secondary pit-connections lacking. Trichocytes sometimes present singly or in groups; intercalary within first-order filaments and sometimes also terminating second-order filaments. Reproductive cells forming within protruding uniporate conceptacles. Bisporangia sometimes present instead of tetrasporangia. Columella present or absent. Apical sporangial plugs absent. Gametangia poorly known.

Information contributed by: H.W. Johansen. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.

Comments: Pneophyllum is segregated from Fosliella and Spongites by the 8-celled sporeling and by trichocytes that are intercalary in first-order filaments. However, studies are needed to verify the discreteness of these genera, and additional data may come from studies of reproductive features.

Numbers of names and species: There are 26 species names in the database at present, as well as 1 infraspecific names. Of the species names, 17 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
Rösler, A., Perfectti, F., Peña, V. & Braga, J.C. (2016). Phylogenetic relationships of Corallinaceae (Corallinales, Rhodophyta): taxonomic implications for reef-building corallines. Journal of Phycology 52(3): 412-431.

Caragnano, A., Foetisch, A., Maneveldt, G.W., Millet, L., Liu, L.C., Lin, S.M., Rodondi, G. & Payri, C.E. (2018). Revision of Corallinaceae (Corallinales, Rhodophyta): recognizing Dawsoniolithon gen. nov., Parvicellularium gen. nov. and Chamberlainoideae subfam. nov. containing Chamberlainium gen. nov. and Pneophyllum. Journal of Phycology 54(3): 391-409.

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: 20 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32985

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 March 2019.

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