C

Arcocellulus cornucervis fHwm+HHH+UHH+W^

Brockmanniella brockmannii

Minutocellus polymorphus

Minutocellus scriptus

Species Pervalvar axis (|juti) Apical axis (|im) Transapical axis (|j.m)

Valve view: Valve outline narrowly lanceolate and oblong to subcircular. Process submarginal in the fascia. Coarse areolation. Labiate process. Morphometric data: Apical axis, 4-36 /xm, transapical axis, 3-5 jura; poroid areolae, 13-15 in 10 ¡xm.

Distribution: North European coastal waters in sediment and in spring plankton (in bloom proportions).

Genus Cymatosira Grunow 1862 (Plate 36, Table 43) Type: Cymatosira lorettziana Grunow.

References: Grunow, 1862, p. 378, Plate 7, Figs. 25a-25c; Van Heurck, 1880-1885, Plate 45, Figs. 38-42; Hustedt, 1959, p. 127, Figs. 648 and 649; Fryxell & Miller, 1978, p. 122, Figs. 20-31; Hasle et al., 1983, p. 17, Text Figs. 1 and 2, Figs. 1-71.

TABLE 43 Morphometric Data of Cymatosira spp.

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