Desmids from Thailand and Malaysia

22 M. HIRANO
land.
16b. var. ovatum (Nordst.) Teil.
Prescott et al. 1981, Synop. 2:3, 24, Pl.156, f.3.
L. 176-211 #m, B. 75-84 ym, I. 37-40 ptm.
New Zeland.
17. Act. westii (Bernard) Hirano, comb. nov.
Syn. Cosmarium turgidum Breb. var. westii (Bernard) Krieger
L. 55 ym, B. 36.5 xtm. St. 26. Java. New to Thailand.
18. Act. wollei (W. & G.S.West) Teil.
Prescott et al. 1981, Synop. 2:3, 25, Pl.150, f.19-23.
L. 31-32 ptm, B. 23-24 ptm. Sts. 20,36,49. Cosmopolitan.
1. Tetmemorus brebtssonii (Menegh.) Ralfs var. brebtssonii
Pl.13, f.3.
Sts. 17,18,19,21. Eurpe, Australia,
West 1904, 216, Pl.32, f.1,2; Krieger 1937, 452, Pl.54, f.1-5; FOrster 1982, 299, Pl.39,
f.10.
L. 143-149 pm, B. 24-26.5 #m, and I. 22-23 ym. Sts. 3,23, India, Indonesia
(Sumatra), Europe, U.S.A., Brazil, Australia, New Zealand.
Ia. var. ansanformis Hirano, var. nov. Pl.22, f.2.
Cellulae mediocres, circiter 37 plo longiores quam latae, leviter constrictae ad
medium, sinu aperto; semicellulae cum apice truncato-convexo cum incisura mediana
profunda angusta, marginibus lateralibus leviter concavis; semicellulae in latere visae
elongato-pyramidatae, apice truncato-recto, marginibus lateralibus paene rectis sed in
basalibus leviter biundulatis; membrana cum interrupto-striae ordinata. Long. 145 ptm,
lat.26.5 ptm, lat. isthm. 23.5 ptm. St. 2.
Type: Pl.22, f.2. Loc. Phu Luang, Thailand.
2. T. granulatus (Br6b.) Ralfs var. granulatus
West 1904, 219, Pl.32, f.7-9; Krieger 1937, 458, Pl.55, f.1-5; F6rster 1982, 3oo,
Pl.39, f.7-8.
L. 123-139 #m, B. 26.5-30 #m, and I. 25 ptm. Sts. 3,4,5. Cosmopolitan.
2a. var. attenuattts W. &G.S.West Pl.4, f.13,14; Pl.22, f.1.
West 1904, 221, Pl.32, f.10; Krieger 1937, 459, Pl.55, f.6; FOrster 1982, 301, Pl.39, f.9.
L. 132 ptm, B. 26-29 ptm, and I. 25-28 #m. Sts. 1,38,39,40. Europe, N.America.
3. T. Iaevis (Ktitz.) Ralfs var. Iaevts
West 1904, 222, Pl.32, f.11-16; Krieger 1937, 455, Pl.54, f.9-12; F6rster 1982, 301,
PL39, f.1-4.
L. 125 ptm, B. 26 ptm, I. 22 ptm. St. 5. Indonesia (Borneo, Sumatra), Singapore,
Europe, Australia. New to Thailand.
3a. var. minuttts (DeBary) Krieger Pl.5, f.1.
Krieger 1937, 457, Pl.55, f.8,9.