Polysiphonia plectocarpa C.W.Schneider 1998
Publication Details
Polysiphonia plectocarpa C.W.Schneider 1998: 27, figs 9-16
Published in: Schneider, C.W. & Searles, R.B. (1998). Notes on the marine algae of the Bermudas. 4. Additions to the flora, including Polysiphonia plectocarpa sp. nov. Phycologia 37: 24-33.
Request PDFType Species
The type species (holotype) of the genus Polysiphonia is Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: south west of Long bar, west of High Point, Bermuda Is. (32 13.7' N, 65 01.0'W); (Schneider & Searles 1998: 24) Holotype: 15 June 1985; collected at 24-27 m on Stypopodium zonale; DUKE or CWS; 18367 (Schneider & Searles 1998: 24)
General Environment
This is a marine species.
Description
Minute spreading epiphytic algae with erect branches 1-3 mm tall, attached by pit-connected, unicellular rhizoids issued from the proximal ends, or occasionally median positions, of ventral periaxial cells on prostrate axes; rhizoids normally 15-35 µm diameter, but occasionally inflated to as much as 70 µm diameter, producing digitate tips upon contact with host species; periaxial cells 4, ecorticate; prostrate axes 50-60 µm diameter, segments 1.4-2.6 diameters long, giving rise to erect axes cicatrigenously from trichoblast scar cells usually at distances of three to six segments, rarely while the trichoblast remains on the plant; erect axes 30-50 µm diameter, segments mostly less than 1.5 diameters long, sparingly to more frequently branched from scar cells; trichoblasts delicate and short, unilaterally branched and appearing pseudodichotomous at maturity, not obscuring the apex; trichoblast scar cells consistently spiraled in a 1/4 pattern on segments of both prostrate and erect axes, but lacking in the most proximal segments of all primary and secondary erect branches; tetrasporangia ellipsoid to subglobose, 30-38 µm diameter, distending the bearing segments at maturity, forming in interrupted or continuous, spiraled series in upper portions of erect axes; dioecious, spermatangial stichidia elliptical, 115-180 µm long and 40-50 µm diameter, forming on the basal cells of trichoblasts that subtend them, at apices of erect axes, without sterile tip cells; cystocarps subglobose to 140 µm diameter, pericarp cells elongate rectangular to parallelogram in rows curved and deflected to the left.
Created: 26 June 1998 by M.D. Guiry.
Last updated: 27 July 2010
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=11312
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 27 July 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024
