Jania articulata N'Yeurt & Payri 2009
Publication Details
Jania articulata N'Yeurt & Payri 2009: 15, figs 7-15
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 Jania is Jania rubens (Linnaeus) J.V.Lamouroux.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Fangatau Atoll (15°49'50''S, 140°54'00''W), Tuamotu, French Polynesia; (N'Yeurt & Payri 2009: 17) Holotype: C.E. Payri; 17 May 2003; UPF; 2710 (N'Yeurt & Payri 2009: 17) Notes: Other material examined. Motu Tauhunu, Manihiki,
Northern Cook Islands, 15 July 1974, leg. G. N. Mac-
Raild, WELT CI25.
Origin of Species Name
Adjective (Latin), articulated, jointed (Stearn 1973).
General Environment
This is a marine species.
Description
Thallus reddish-orange to cream-colored, soft and
pliable, forming clumps to 15 mm high and 20–30 mm
wide, consisting of numerous jointed branches
composed of calcified segments or intergenicula; calcification
distinctly annulate. Holdfast small and inconspicuous,
embedded in coralline algae substratum.
Intergenicula separated by uncalcified nodes or genicula; branches with a core of medullary
filaments with cells organized in tiers 40–50 µm apart,
surrounded by a cortex of small rounded cells. Axes
(200) 300–400 (600) µm in diameter, with very frequent uncalcified genicula. Branching
dichotomous, sometimes trichotomous in basal portions
of thallus; dichotomies slightly offset. Intergenicular
distance 400–1000 µm; genicula numerous;
between 4 and 11 (22) unbranched genicula between
successive dichotomies. Intergenicular length: width
ratio small, between 1.3 and 2.5. Intergenicula with (4)
6–11 (13) tiers of clear cylindrical cells 150–160 µm
long and 5–6 mm in diameter; genicula composed of a
single tier of densely packed elongate cylindrical cells
400–420 mm long and 5–6 µm in diameter.
Cortical cells (6)8–10(12) mm in diameter,
supported by elongate, cylindrical subcortical cells
25–30 µm long. Branch apices rounded, not
inflated, 150–200 µm in diameter. Angle
of branching 45–60°. Tetrasporangial conceptacles
single-chambered and swollen, terminal on intergenicular
apices, to 500 mm wide and 400 mm high, with two
surmounting branchlets. Tetrasporangia zonately
divided, to 200 µm long and 80 µm in diameter.
Created: 18 February 2009 by M.D. Guiry.
Last updated: 22 September 2020
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=134265
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 22 September 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 18 April 2024
