Helminthocladia kempii Popolizio, C.W.Schneider & Chengsupanimit 2013
Helminthocladia kempii Popolizio, C.W.Schneider & Chengsupanimit 2013: 239, figs 2-11
Published in: Popolizio, T.R., Schneider, C.W., Chengsupanimit, T., Saunders, G.W. & Lane, C.E. (2013). Notes on the marine algae of the Bermudas. 13. Helminthocladia kempii sp. nov. (Nemaliales, Liagoraceae) based upon H. calvadosii sensu auct. from western Atlantic. Cryptogamie Algologie 34: 22-244, 11 figs, 2 tables.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type locality: "cove immediately east of Spanish Point Park, Bermuda Is., Bermuda (32 18 25.5N, 64 48 48.6W)"; (Popolizio & al. 2013: 239) Holotype: C.W. Schneider 12-10-14; 18.i.2012; 0-1 m on rock; MICH; (Popolizio & al. 2013: 239)
This is a marine species.
Plants reddish-brown in color, erect, arising from a simple discoidal holdfast, to 19 cm tall; axes mucilaginous, smooth and slippery but firm, and subdichotomously branched; main axes 0.5-2.5 mm in diameter, typically overwhelmed by short, irregularly disposed adventitious lateral branches, some of these remaining undeveloped and dichotomous, whereas others become additional leading axes; cortical assimilatory filaments branched into fan-like clusters, 3-6 cells from base to apex, and to 230 µm in length; basal cortical cells 7-10 µm in diameter and 18-35 µm long with shorter subterminal cells 12-15 µm diameter and 15-22 µm long, and apical cells 10-20 µm in diameter and 20-35 µm long; medullary axes composed of filaments with cells 11-27 µm in diameter and 70-175 µm long; gametophytes dioecious, spermatangial clusters paniculate with globose spermatangia 2-5 µm in diameter; carpogonial branches consisting of 3-4 cells, 7.5-10.0 µm in diameter and 30-38 µm long; first division of the carpogonium transverse or obliquely transverse after fertilization and following excision of the trichogyne; gonimoblast filaments issued from divided carpogonium cells, comprised of cells 3.5-4.5 µm in diameter and 7.0-9.0 µm long, producing carposporangia 3.0-5.0 µm in diameter and 7.0-9.0 µm long; few sterile post-fertilization cells present, arising from the supra- and infra-supporting cells adjacent to the carpogonial branch, and wrapping around the carpogonial branches; a weak involucre of elongate sterile filaments forming around the carposporophytes produced from adjacent cortical cells of the same assimilatory fascicle.
Created: 19 December 2013 by M.D. Guiry.
Last updated: 05 October 2015
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=148040
Cite this record as:
Craig Schneider in Guiry, M.D. & Guiry, G.M. 05 October 2015. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 02 October 2022