Halymenia nukuhivensis N'Yuert & Payri 2009
Publication Details
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.
Request PDFType Species
The type species (lectotype) of the genus Halymenia is Halymenia floresii (Clemente) C.Agardh.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
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.
General Environment
This is a marine species.
Description
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.
Created: 18 February 2009 by M.D. Guiry.
Last updated: 10 March 2014
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=134264
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 March 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 November 2024
