Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
Desmids from Thailand and Malaysia
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10.<br />
11<br />
12.<br />
13.<br />
14.<br />
15.<br />
1.<br />
M. HIRANO<br />
angles broadly rounded, lateral margin slightly concave or almost straight, basal angles<br />
broadly rounded; cell wall scrobiculated on all the surface of semicell, lateral margin <strong>and</strong><br />
apex furnished with numerous spines at the margin <strong>and</strong> within the margin, with a hori-<br />
zontal series of conical denticulations just above the isthmus; side view of semicell<br />
oblong-elliptic, sinus excavated, with a conical denticulations on each side of the basal<br />
part of semicell, vertical series of spines disposed <strong>from</strong> the base to apex. Lssp. 193-198<br />
ptm, Bssp. 145 pm, <strong>and</strong> I. 41.8 "m. St. 10. <strong>Thail<strong>and</strong></strong>.<br />
X. perissacanthum Scott & Prescott var. mintLs Scott & Prescott Pl.37, f.2.<br />
Scott & Prescott 1961, 83, Pl.41, f.3.<br />
Lssp. 61.6 ptm, Bssp. 52.8 ,um, I. 13 #m. St. 3. Indonesia (Sumatra). New to Thai-<br />
l<strong>and</strong>.<br />
X. raciborskii Gutw. Pl.34, f.7.<br />
Krieger 1932, 192, Pl.25, f.4.<br />
Lssp. 40.5-48.5 ptm, Bssp. 39.6-43 ptm, I. 15.4-17.5 ptm. Sts. 36,37. Indonesia<br />
(Sumatra). New to <strong>Thail<strong>and</strong></strong>.<br />
X. sexmamilatum W. & G.S.West var. putneyense lyengar & Bai Pl.35, f.3-5.<br />
Scott & Prescott 1961, 84, Pl.39, f.2; Hirano 1972, Contr. 23, 143, Pl.8, f.1.<br />
L. 44-53 um, B. 36-46 ptm, I. 8-11 ptm. Sts. 47,53. Cambodia, Indonesia (Suma-<br />
tra). New to <strong>Thail<strong>and</strong></strong>.<br />
X. spinosum (Joshua) W.&G.S.West Pl.34, f.3,4.<br />
Skuja 1949, 151, Pl.33, f.11,12; Scott & Prescott 1961, 84, Pl.37, f.2,3. (forma); Hira-<br />
no 1972, Contr. 23, 143, Pl.8, f.3.<br />
Lssp. 49-56 ptm, Bssp. 50-55 ptm, I. 26.5-31.5 ptm. Semicells transversely elliptic,<br />
margins somewhat undulate, spines short, cell wall punctated, scrobiculations at the bas-<br />
al part of a semicell, disposed in a horizontal or arch form of one to 3-4 series. Sts.<br />
10,23,24. Burma, Indonesia (Sumatra), Cambodia.<br />
X. subtrilobum W. & G.S.West<br />
Scott & Prescott 1961, 84, Pl.39, f.1.<br />
Lssp. 51-80 Ltm, Bssp. 48-57 um, I. 11-13 ptm. Sts. 12,32. Indonesia (Java, Suma-<br />
tra, Borneo). New to <strong>Thail<strong>and</strong></strong>.<br />
X. superbum Elfv. PL33, f.11; PL37, f.1.<br />
Scott & Prescott 1961, 85, Pl.37, f.5.<br />
Lssp. 83.5-92 ptm, Bssp. 57-66 #m, <strong>and</strong> I. 17.6-18.5 ptm. Lateral spines of a<br />
semicell large <strong>and</strong> long, disposed in a pair but variable in number (some of them incom-<br />
plete, especially an apical one). St. 24. Indonesia (Sumatra). New to <strong>Thail<strong>and</strong></strong>.<br />
Arthrodesmas apiculattLs Joshua Pl.29, f.11.<br />
Joshua 1886, 644, Pl.24, f.15; Skuja 1949, 146, Pl.33, f.7; Scott & Prescott 1961, 73,<br />
Pl.34, f.11.<br />
L. 44 ptm, B. 40 xtm, <strong>and</strong> I. 8.6 ptm. St. 19. Burma, Indonesia (Sumatra). New to
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