Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
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<strong>Desmids</strong> <strong>from</strong> <strong>Thail<strong>and</strong></strong> <strong>and</strong> <strong>Malaysia</strong> 23<br />
L. 51-53 ptm, B. 14-15 ptm, I. 13 ptm. Sts. 39,41. Europe, U.S.A., Africa. New to<br />
<strong>Thail<strong>and</strong></strong>.<br />
3b. var. tropictts Krieger Pl.1, f.14; Pl.22, f.14.<br />
Krieger 1932, 217, Pl.22, f.8; Krieger 1937, 457, Pl.54, f.13-15.<br />
L. 140 ptm, B. 39.6 ptm, I. 35 ptm. St. 27. Indonesia (Java, Sumatra). New to Thai-<br />
l<strong>and</strong>.<br />
1. Cosmarium abbreviatum Racib. var. mintLs (W. & G.S.West) Krieger & Gerloff<br />
2.<br />
3.<br />
4.<br />
5.<br />
6.<br />
Pl.18, f. 12.<br />
Krieger & Gerloff 1969, Gatt. Cosm. 3-4, 242, Pl.42, f.18; Prescott et al. 2:3, 60,<br />
P1211, f.7.<br />
L. 6.5 ptm, B. 7.5 ptm, I. 2.2 ptm. Cells minute, length approximately as long as the<br />
breadth or slightly broader than the length, deeply constricted, sinus linearly open; semi-<br />
cells subhexagonal, apex straight, lateral margin variable, normally divided into 2 or 3<br />
sides. St. 53. Japan, Europe. New to <strong>Thail<strong>and</strong></strong>.<br />
C. alpestre Roy&Bisset PL13, f.9.<br />
West 1908, Brit. Desm. 3, 24, Pl.67, f.14; Krieger & Gerloff 1969, Gatt. Cosm. 3-4,<br />
333, Pl.54, f.1.<br />
L. 84-99 ptm, B. 79-84 ptm, I. 77-78 xtm. Sts. 19,23,24. Japan, Europe, U.S.A.,<br />
Africa, Australia. New to <strong>Thail<strong>and</strong></strong>.<br />
C. amoenum Breb.<br />
West 1911, Brit. Desm. 4, 29, Pl.102, f.1-4; Pl.103, f.9; F6rster 1982, 166, Pl.29,<br />
f.10.<br />
L. 55-59 #m, B. 30-31 ptm, I. 23 /tm. St. 1. Japan, Ceylon, Europe, Brazil. New to<br />
<strong>Thail<strong>and</strong></strong>.<br />
C. anceps Lund. var. undulatum Krieger&Gerloff Pl.17, f.18.<br />
Krieger & Gerloff 1965, Gatt. Cosm. 2, 185, Pl.37, f.5.<br />
L. 22 ptm, B. 16.4 ym, I. 12.3 um. Semicells subquadrate, apex retuse, lateral mar-<br />
gin with 2 undulations. This species differs <strong>from</strong> C. pseudo-speciostts Racib. by the num-<br />
ber of lateral undulations <strong>and</strong> a slightly linealy opened sinus. St. 18. N.America. New to<br />
<strong>Thail<strong>and</strong></strong>.<br />
C. angulosum Breb. var. angulosum PL13, f.6.<br />
West 1908, 3, 93, Pl.72, f.35,36; Fdrster 1982, 166, Pl.24, f.15,16.<br />
L. 16.3-17 ptm, B. 12-12.5 ptm, I. 3.5-4 ptm. Sts. 26,30. Cosmopolitan.<br />
C. apertum Turner<br />
Turner 1892, K. Sv. Vet. Akad. H<strong>and</strong>l. 25:5, 54, Pl.8, f.11; Prescott et al. 1981, 2:3,<br />
73, PL181, f.1,2.<br />
L. 23 ptm, B. 22 ym, I. 5.7 um. Cells small, almost as long as the breadth, constric-<br />
tion deep, sinus open widely but acuminate at the extremity; semicells subsemicircular,<br />
apex <strong>and</strong> lateral margins convex, lateral angles rounded; cell wall punctated. St. 25. In-
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