Scinaia Bivona-Bernardi, 1822
Holotype species: Scinaia forcellata Bivona-Bernardi
Currently accepted name for the type species: Scinaia furcellata (Turner) J.Agardh
Original publication and holotype designation: Bivona-Bernardi, A. (1822). Scinaia algarum marinarum novum genus.. L'Iride, Giornale di Scienze, Letteratura ed Arti per la Sicilia 1: 232-234, 1 pl..
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Huisman, J.M., Harper, J.T. & Saunders, G.W. (2004). Phylogenetic study of the Nemaliales (Rhodophyta) based on large-subunit ribosomal DNA sequences supports segregation of the Scinaiaceae fam. nov. and resurrection of Dichotomaria Lamarck. Phycological Research 52(3): 224-234.
Monotypic when first introduced. - (20 Jan 2017) - M.D. Guiry
Description: Gametophytes and tetrasporophytes heteromorphic. Gametophytes erect from discoid holdfasts, dichotomously branched. Axes soft or cartilaginous, noncalcified, terete, complanate or flat, constricted at the nodes or unconstricted, multiaxial. Medulla filamentous; inner cortical filaments dichotomously branched, pigmented; outer cortex includes large, colorless or weakly pigmented utricles; utricles interspersed with smaller pigmented cells or closely compacted to form a continuous surface. Monosporangia formed by pigmented cells at surface of branches. Monoecious or dioecious. Spermatangia in surficial sori. Carpogonial branches 3-celled, formed in inner cortex; prior to fertilization the hypogynous cell produces 2-4 sterile branches and the basal cell initiates pericarp filaments. Ostiolate cystocarps immersed in the branches. Gonimoblast filaments arise from the carpogonium; fusion cells form from the carpogonium and the hypogynous cell, with or without the basal cell (Huisman 1986), and basal cells of the gonimoblasts and sterile branches on hypogynous cell may also be incorporated (Hommersand & Fredericq 1990); carposporophyte compact, anchored basally in cystocarp; gonimoblast filaments terminate in chains of carposporangia. Tetrasporphytes filamentous; monsporangia sometimes present; tetrasporangia terminal on branched filaments, sometimes displaced laterally by sympodial branching, division of tetrasporangia cruciate, decussate or irregularly zonate, new sporangia sometimes proliferating within old sporangia.
Information contributed by: R.B. Searles. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.
Comments: Intertidal and subtidal plants of temperate and tropical seas.
Numbers of names and species: There are 58 species names in the database at present, as well as 10 infraspecific names. Of the species names, 45 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.
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=89
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 August 2019.