Validation Of Names

New Taxa

Hemidiscaceae Hendey, 1937 emend. Simonsen, 1975 ex Hasle

Cells cylindrical to discoid, usually solitary. Valve outline circular, slightly elliptical, ovate or semi-circular. Valve face and mantle often different in structure. One marginal ring of large labiate processes (rimoportulae), similar in shape and generally also similar in size. A pseudonodulus usually present. Cellulae discoiideae vel cylindricae, plerumque solitariae. Valvae circulares, parum ellipticae, ovatae vel semicirculares. Frons valvae e limbo saepe structura differens, annulum marginalem rimoportularum forma amplitudineque similarium habens. Pseudonodulus plerumque adest.

Nitzschia braarudii Hasle

Description: Hasle, 1960 (Skrifter utgitt av Det Norske Videnskaps-

Akademi i Oslo J. Matematisk-Naturvidenskapelige Klasse 2:22, Fig. 11,

Holotype: IMBB slide No. 78 conserved in Section of Marine Botany,

Department of Biology, University of Oslo.

Isotypes: IMBB slides Nos. 79, 80, BRM Zv 2/95, BM 78510.

Thalassiothrix gibberula Hasle

Description: Hasle, 1960 (Skrifter utgitt av Det Norske Videnskaps-

Akademi i Oslo I. Matematisk-Naturvidenskapelige Klasse 2:19, Fig. 6,

Holotype: IMBB slide No. 102 conserved in Section of Marine Botany, Department of Biology, University of Oslo.

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