|
Description: |
Thallus medium to dark brown, loosely to densely tufted, (0.5–)1–4(–10) cm long, with the axes attached by a tuft of descending rhizoids from the lower cells, much branched irregularly to spirally or tending to unilateral above; epilithic or epiphytic.Filaments tapering gradually, 30–60 µm in diameter below with cells L/B 1–2(–2.5), mid branches 25–40 µm in diameter with cells L/B (0.7–)1–1.6(–2), lesser branchlets 20–30 µm in diameter with cells L/B (0.5–)1–1.5, tapering into false hairs 8–20 µm in diameter with cells L/B 4–6. Growth from scattered meristematic regions along the main axes and meristems at the base of most branches, with further scattered intercalary divisions. Cells with numerous discoid phaeoplasts each with a pyrenoid, and clustered physodes. Original publication: Silva, P.C., Meñez, E.G. & Moe, R.L. (1987). Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: [i-ii] iii-iv, 1-179, 2 figs, 1 table.
 Download PDF from Algaebase
|
| Life Cycle |
Plurilocular sporangia scattered but often tending to be unilateral and adaxial, sessile, cylindrical and straight but usually tapering slightly to rounded ends, (50–)60–140 µm long and 20–40µm in diameter, L/B (2.5–)4–6; sporangia with large or small locules reported. Unilocular sporangia on same plants as plurilocular sporangia, scattered, sessile, ovoid, 40–60 µm long and 16–27 µm in diameter. |
| References |
Dawes, C.J. & Mathieson, A.C. (2008). The seaweeds of Florida. pp. [i]- viii, [1]-591, [592], pls I-LI. Gainesville, Florida: University Press of Florida. Kraft, G.T. (2009). Algae of Australia. Marine benthic algae of Lord Howe Island and the southern Great Barrier Reef, 2. Brown algae. pp. [i-iv], v-vi, 1-364, 107 figs. Erratum of fig. 73 from vol. 1. Canberra & Melbourne: Australian Biological Resources Study and CSIRO Publishing. Norris, J.N. (2010). Marine algae of the Northern Gulf of California: Chlorophyta and Phaeophyceae. Smithsonian Contributions to Botany 94: i-x, 1-276. Pedroche, P.F., Silva, P.C., Aguilar Rosas, L.E., Dreckmann, K.M. & Aguilar Rosas, R. (2008). Catálogo de las algas benthónicas del Pacífico de México II. Phaeophycota. pp. [i-viii], i-vi, 15-146. Mexicali & Berkeley: Universidad Autónoma Metropolitana and University of California Berkeley. Skelton, P.A. & South, G.R. (2007). The benthic marine algae of the Samoan Archipelago, South Pacific, with emphasis on the Apia District. Nova Hedwigia Beihefte 132: 1-350. |
| Type information: |
Basionym
Ectocarpus mitchelliae Harvey Type information
Type locality: Nantucket, Massachusetts, U.S.A. (Silva, Basson & Moe 1996: 568). Type: TCD (Womersley 1987: 52). |
