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Jania articulata N'Yeurt & Payri

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.
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Type 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.

Origin of species name
Adjective (Latin), articulated, jointed (Stearn 1973).

Synonym(s)
No synonyms are currently included in AlgaeBase.

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.

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.

No distributions recorded
No distributional records for this taxon have been recorded by AlgaeBase to date. Generally, recent national lists or extensive regional or state lists have been employed to give a general indication of distribution.

(as Jania articulata N'Yeurt & Payri)
Pacific Islands: Central Polynesia (Tsuda & Walsh 2013), French Polynesia (N'Yeurt & Payri 2010).

Key references
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: 30 June 2013 by Antoine N'Yeurt

Accesses: This record has been accessed by users 643 times since it was created.

Verification of data
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Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=134265

Citing AlgaeBase
Cite this record as:
Antoine N'Yeurt in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 February 2019.

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