Holotype species: Portieria coccinea Zanardini
Currently accepted name for the type species: Portieria hornemannii (Lyngbye) P.C.Silva
Original publication and holotype designation: Zanardini, G. (1851). Algae novae vel minus cognitae in mari Rubro a Portiero collectae. Flora 34: 33-38.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Payo, D.A., Leliaert, F., Verbruggen, H., D'hondt, S., Calumpong, H.P. & De Clerck, O. (2013). Extensive cryptic species diversity and fine-scale endemism in the marine red alga Portieria in the Philippines. Proceedings of the Royal Society of London B Biological Sciences 280: 20122660.
Description: Thallus recumbent to erect, growing from a discoid holdfast, often with several fronds growing from a common holdfast, or tangled among other algae with no obvious holdfast, with 1 or more percurrent axes that are richly alternately branched. Axes compressed to flattened, with inrolled apices. Structure uniaxial; each axial cell producing 3 or 4 periaxial cells, the first arising alternately and forming the primary filament of lateral branches. Medulla pseudoparenchymatous, consisting of large cells, grading to a smaller-celled cortex with prominent vesicular cells. Spermatangia borne in nemathecia on outer cortical cells. Carpogonial branches 3- or 4-celled; basal cell conspicuously enlarged; auxiliary cell branches 3 (–4) celled. Following fertilisation, carpogonial branch cells distal to the basal cell fusing, issuing 1 or 2 connecting filaments that fuse laterally with auxiliary cells. Gonimoblast initials arising from diploidised auxiliary cells and developing thallus-outward among nemathecial filaments, forming compartments of densely clustered carposporangia surrounded by a pericarp in swollen nemathecial areas. Tetrasporangia in nemathecia along margins and the faces of axes and laterals, irregularly zonately-cruciately divided [after Payo et al. (2011); Guiry & Guiry (2017)].
Information contributed by: K.R. Dixon & Huisman (2018). The most recent alteration to this page was made on 26 Sep 2018 by M.D. Guiry.
Numbers of names and species: There are 9 species names in the database at present, of which 7 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.
Leliaert, F., Payo, D.A., Gurgel, C.F.D., Shils, T., Draisma, S.G.A., Saunders, G.W., Kamiya, M., Sherwood, A.R., Lin, S.-M., Huisman, J.M., Le Gall, L., Anderson, R.J., Bolton, J.J., Mattio, L., Zubia, M., Spoke, T., Viera, C., Payri, C.E., Coppejans, E., D'hondt, S., Verbruggen, H. & De Clerck, O. (2018). Patterns and drivers of species diversity in the Indo-Pacific red seaweed Portieria. Journal of Biogeography 2018: 1-15.
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: 07 January 2013 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=34461
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 23 May 2019.