Desmids from Thailand and Malaysia

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1.
Desmicts from Thailand and Malaysia 89
Skuja 1949, 162, Pl.35, f.13; Hirano 1972, Contr. 23, 157; Prescott et al. 1983, 2:5, 41,
Pl.464, f.8,9.
L. 20-21 ptm, B. 22-24 ptm, and I. 22.5 ptm. Sts. 22,32, Burma, Japan, Europe,
Africa, Australia, New Zealand.
D. coarctatum Nordst. Pl.51, L13.
West & Carter 1923, 5, 252, Pl.165, f.1,2; Krieger 1932, 220, Pl.26, f.7; Prescott et al.
1983, 2:5, 42, Pl.465, f.2-4.
L. 20-33 #m, B. 24-30 ptm, and I. 21 ptm. Sts. 21,22,36,37,38,40,41. Indonesia
(Sumatra), Europe. Cosmopolitan. New to Thailand.
D. graciliceps (Nordst.) Lagerh. Pl.51, f.6,7.
West & Carter 1923, 5, 253, Pl.166, f.5; Scott & Prescott 1961, 123, Pl.63, f.1 -4; Pre-
scott et al. 1983, 2:5, 44, Pl.466, f.1-5.
L. 48.4 ptm, B. 39.6 ptm, and I. 24.2 ptm. Sts. 1,39,41. India, Ceylon, Indonesia
(Sumatra), Europe, Brazil, New Zealand. New to Thailand.
D. pseudostreptonema W.&G.S.West Pl.51, f.11
West & Carter 1923, 5, 244, Pl.165, f.5,6; Prescott et al. 1983, 2:5, 47, Pl.466, f.12-
16.
L. 16.7 ptm, B. 28.6 ptm, and I. 20.7 xtm. St. 10. Ceylon, Europe, Australia. New to
Malaysia.
D. quadratum Nordst. Pl.50, f.3: Pl.51, f.8.
West & Carter 1923, 5,254, Pl.166, f.6,7; Scott & Prescott 1961, 125, Pl.63, f.5,6; Pre-
scott et al. 1983, 2:5, 47, Pl.467, f.2,3.
L. 16.7-28.6 ym, B. 22-53 ptm, and I. 32.7-37.4 ptm. Cells of medium size,
approximately 1.3 times broader than the length, constriction slight, sinus open and re-
tuse; semicells lowly pyramidate, lateral margins convex biundulate, apex straight and
directly connected with an adjacent semicell. Sts. 22,30. Ceylon, Indonesia (Borneo,
Sumatra), Europe, U.S.A., Brazil. New to Thailand.
D. suboccidentale Scott&Prescott Pl.50, f.2.
Scott & Prescott 1961, 125, Pl.63, f.7.
L. 17.6 xtm, B. 33 #m. St. 32. Indonesia (Borneo, Sumatra, Java). New to Thailand.
D. swartzii Ag. Pl.51, f.12.
West & Carter 1923, 5, 246,' Pl.163, f.5-8; Krieger 1932, 221, Pl.26, f.8; Scott & Pre-
scott 1961, 125, Pl.63, f.8; Hirano 1972, Contr. 23, 157.
L. 15 ptm, B. 40 xtm, and I. 34 um. Sts. 20,32. India, Burma, Indonesia (Sumatra),
Cambodia, Japan, Europe, N.America, Australia, New Zealand.
Bambusina brebissonii KUtz. var. brebissonii
Prescott et al. 1983, 2:5, 55, Pl.470, f.1-11. Syn. Gymnozyga moniliformis Ehrenb.
L. 26.4-28 um, B. 17.6-20 ptm, and I. 17.6 um. Sts. 21,28,30,41,53. Cambodia, In-
donesia (Sumatra), Japan. Cosmopolitan.