Download (6Mb) - USP Electronic Research Repository - The ...

Chondria dasyphylla (Woodward) C. Agardh 1817: xviii; Weber-van Bosse 1923: 352;
Taylor 1960: 616; Durairatnam 1961: 74, pl. 19, figs 10-1 1; Chapman 1963: 145, fig. 150;
Jaasund 1976: 135, fig. 274; pl. 9; Dawes 1974: 155; Ngan and Price 1979: 16; Gordon-Mills
1987: 246, figs 30-57; Lewis and Norris 1987: 22; Santelices and Abbott 1987: 9; Silva et
al. 1987: 63; Garrigue and Tsuda 1988: 64; Tsuda 1991: 50; Verheij and Prud'homme van
Reine 1993: 172.
Fucus dasyphyllus Woodward 1794: 239, pl. 23, figs 1-3 (syntype localities: Cromer and
Yarmouth, Norfolk, England).
(Figs 134, 188a, b)
Plants dark red, up to 30 mm high, with sparse and broadly pyramidal branching. Main
axis 1-1.5 mm in diameter; branchlets single or clustered, constricted at the base and retuse
at the apex, with central apiculus bearing a tuft of trichoblasts. Axial cell surrounded by 5
pericentral cells, each 88-120 pm in diameter. Cortex composed of 3 layers, the outermost
of small oblong cells up to 12 Fm in diameter; cortical cells angular in surface view. Plants
sterile.
Distribution
Fiji, New Caledonia, Easter Island, northern Australia, Indonesia, Taiwan, Ryukyu Island,
Philippines, Jamaica, tropical Americas, Caribbean, Ceylon, Tanzania, Europe.
Fijian Records
Garbary et al. 1991: 254; South and Kasahara 1992: 65.
Rotuman Distribution
Kelega; Lopta; Tua'koi (TI41 USP 475).
Habitat and Remarks
Found attached to coral rubble in tide pools, middle reef. In view of the need for a
revision of the non-European records of Chondria dasyphylla (see Gordon-Mills 1987), the
Rotuman plants cannot be firmly ascertained to belong to that species, although in vegetative
characters they agree with the descriptions given by Taylor (1960) and Gordon-Mills (1987).
Chondria sedifolia Harvey 1853: 19, pl. XVIII: G (type locality: Key West, Florida,
USA); Taylor 1928: 171, pl. 34, fig. 11; 1960: 615; Chapman 1963: 145, fig. 149; Dawes
1974: 155; Jaasund 1976: 135, fig. 273a, b; pl. 9; Silva et al. 1987: 63.
(Figs 189, 191a, b)
Plants dull reddish-purple, up to 40 mm high forming compact entangled mats, coarse and
firm to the touch. Main axis percurrent, 400-600 pm in diameter. Branching broadly
pyramidal; branchlets 400-500 bm in diameter, erect-spreading and constricted at the base,
club-shaped with truncated distal ends bearing a tuft of trichoblasts. Axial cell spherical,
25-28 p,m in diameter and surrounded by 5 pericentral cells 62-68 pm in diameter. Medulla
composed of loosely-packed ovoid cells 40-45 pm in diameter. Cortex 2-layered; the
lowermost of obovoid cells 12-15 Fm in diameter, the uppermost of subrectangular cells up
to 3 pm in diameter. Cortical cells rounded and loosely-packed in surface view.
Tetrasporangia cruciate, dark red, 75-100 pm in diameter, clustered near the apices of fertile
branchlets.
Distribution
Fiji, Philippines, Caribbean, north America, Tanzania.