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Eucampia antarctica

PLATE 33 Cerataulina dentata: (a) chain in girdle view. Scale bar = 20 /u.m; (b) valve with costate ocelli, marginal labiate process, and dentate margin; (c) valve in girdle view with bands. Scale bar = 10 ßm. From Hasle & Syvertsen (1980). Climacodium frauenfeldianum: twisted chain. After Cupp (1943). Scale bar = 20 p.m. Eucampia antarctica: (a and d) chains in broad and (b) narrow girdle view, (c) with semiendogenous resting spores and, (e) with "winter stages." Scale bar = 10 /am; (f) valve with marginal labiate process. Scale bar = 10 /u.m; (g) costate ocellus. Scale bar = 1 ¿im. From Syvertsen 8c Hasle (1983).

Basionym: Cerataulus bergonii H. Peragallo. Correct name: Cerataulina pelagica (Cleve) Hendy. References: Ehrenberg, 1845a, p. 365; Greville, 1866, p. 83, Figs. 22-28; Cleve, 1889, p. 54; Peragallo, 1892, p. 103, Plate 13, Figs. 15 and 16; Schutt, 1896, p. 95, Fig. 165; Ostenfeld 8c Schmidt, 1901, p. 153, Fig. 7; Hustedt, 1930, p. 869, Fig. 517 (vegetative cells of C. pelagica and resting spore of C. bicornis); Hendey, 1937, p. 279; Cupp, 1943, p. 167, Fig. 117; Hendey, 1964, p. 113, Plate 6, Fig. 4; Hasle 8c Syvertsen, 1980; Hasle, 1983c; Hasle 8c Sims, 1985; Takano, 1990, pp. 270-273.

Generic characters:

Cells twisted about pervalvar axis.

Valves circular to subcircular.

Elevations low with wing-like extensions.

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