Halymenia nukuhivensis N'Yuert & Payri 2009
Halymenia nukuhivensis N'Yuert & Payri 2009: 13, figs 2-6
Published in: N'Yeurt, A.D.R. & Payri, C.E. (2009). Four new species of Rhodophyceae from Fiji, Polynesia and Vanuatu, South Pacific. Phycological Research 57: 12-24.
Status of name
This name is of an entity that is currently accepted taxonomically.
No synonyms are currently included in AlgaeBase.
This is a marine species.
Thallus 50–60 mm high, composed of an irregular, strap-shaped portion of thallus 3–5 mm wide, from which are issued clusters of 8–10 papery-thin cuneate to spathulate blades 5–15 mm broad and 120–130 µm thick, irregularly and broadly dichotomously branched. Attachment to the substratum is via a small stipe about 2 mm long and 0.5–1.0 mm in diameter, slightly thicker but of similar internal anatomy to the rest of the thallus. Color in living state is unknown; formalin-preserved material is yellow-cream becoming brownish-black in basal portions. Cortex 2–3 layered; outermost cortical cells cuboid to slightly elongate, 2.5–6.0 µm in diameter and 2.0– 6.0 µm long, borne in pairs on rounded cells 4–5 mm in diameter. Innermost cortical cells ovoid, refractive, ganglionic to stellate, 10–20 µm in diameter, usually with three to six slender arms subtending medullary filaments 5–7 µm in diameter and 15–40 µm long. Medulla composed in almost equal proportions of periclinal, anti-clinal and oblique filaments. Carpogonial branches were not seen. Auxiliary cells are formed in open ampullar baskets, with branched filaments lining a narrow neck. Gonimoblasts develop on the auxiliary cell, after contact with a connecting filament, consisting of several successively maturing gonimolobes 10–15 µm in diameter surrounded by a lax involucre of sterile filaments, located in the outer medulla below a carpostome flanked by elongate sterile cells. Plants do not adhere well to paper when dry.
Type locality: Nuku Hiva (08°52'57''S, 140°06'05''W), Marquesas (N'Yeurt & Payri 2009: 14). Holotype: J. Orempuller, UPF 575; c. 1997; UPF 575 (N'Yeurt & Payri 2009: 14). Notes: Paratype. Nuku Hiva, Marquesas, c. 1997, leg. J. Orempuller, UPF 574.
N'Yeurt, A.D.R. & Payri, C.E. (2010). Marine algal flora of French Polynesia III. Rhodophyta, with additions to the Phaeophyceae and Chlorophyta. Cryptogamie Algologie 31: 3-205.
Created: 18 February 2009 by M.D. Guiry
Verified by: 10 March 2014 by M.D. Guiry
Accesses: This record has been accessed by users 536 times since it was created.
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Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 04 August 2020.