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Polysiphonia plectocarpa C.W.Schneider 1998

Publication details
Polysiphonia plectocarpa C.W.Schneider in Schneider & Searles 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.
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Type 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).

No synonyms are currently included in AlgaeBase.

General environment
This is a marine species.

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.

Detailed distribution with sources
(as Polysiphonia plectocarpa C.W.Schneider)
Atlantic Islands: Bermuda (Schneider & Searles 1998 , Schneider 2003).

Western Atlantic: Trop. & Subtrop. W. Atlantic (Wynne 2017).

Created: 26 June 1998 by M.D. Guiry

Verified by: 27 July 2010 by M.D. Guiry

Accesses: This record has been accessed by users 596 times since it was created.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

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.

Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=11312

Citing AlgaeBase
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 06 May 2021.

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