Gracilaria shimodensis Terada, R.& Yamamoto, H. 2000
Publication Details
Gracilaria shimodensis Terada, R.& Yamamoto, H. 2000: 189-198, figs 1-27
Published in: Terada, R. & Yamamoto, H. (2000). A taxonomic study on two Japanese species of Gracilaria: Gracilaria shimodensis sp. nov. and Gracilaria blodgettii (Gracilariales, Rhodophyta). Phycological Research 48: 189-198.
Publication date: September 2000
Type Species
The type species (lectotype) of the genus Gracilaria is Gracilaria compressa (C.Agardh) Greville.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Susaki, Shimoda City, Shizuoka Prefecture, Japan; (Terada & Yamamoto 2000: 190) Holotype: Terada; 29 March, 1998; (Terada & Yamamoto 2000: 190)
General Environment
This is a marine species.
Description
Plants solitary or caespitose, generally up to 30 cm (sometimes up to 40 cm) long, hard in texture, reddish-brown or somewhat purplish-brown in colour, not adhering to paper in drying; erect axes arising from a small basal disc, terete throughout, branched alternately, sometimes secundly or dichotomously; branches and branchlets abruptly constricted at bases, tapering gradually toward acute or obtuse apices; thallus multiaxial; cortex consisting of globular cells with dense cytoplasm; cortical cells up to 10 µm high, up to 6 µm wide, connected with only their parental cells by primary pit-connections; medulla consisting of 6-8 layers of unpigmented, spherical cells with vacuoles; medullary cells increasing abruptly in size toward the centre, up to 400 µm in diameter, frequently connected with surrounding cells by secondary pit-connections. Spermatangia formed on whole surface except apical and basal parts, and in deep pot-shaped conceptacles; spermatangial conceptacles up to 150 µm deep, up to 80 µm wide. Cystocarps formed on the entire surface except basal and apical parts, prominently protruding from the surfaces, globose, up to 1.5 mm high and up to 2 mm wide, slightly constricted at bases, each with a slightly rostrate or not rostrate ostiole; gonimoblasts consisting of large cells (up to 120 µm in diameter); traversing filaments abundant between gonimoblasts and pericarp; pericarp up to 120 µm thick, consisting of 8-10 layers of cells; carpospores up to 32 µm in diameter. Tetrasporangia formed on entire surface except basal and apical portions, up to 60 µm high, up to 30 µm wide, cruciately divided; tetraspores up to 35 µm in diameter.
Habitat
Plants grow on rock in the lower intertidal to sublittoral zones
Created: 26 April 2002 by M.D. Guiry.
Last updated: 10 January 2005
Verification of Data
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=43875
Citing AlgaeBase
Cite this record as:
Sandy Lawson in Guiry, M.D. & Guiry, G.M. 10 January 2005. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
