Surirella cf. fastuosa Ehrenberg, sensu Ruck & Kociolek 2004 Figs 146–149

Ref. illus.: Ruck & Kociolek 2004, pl. 11–13

Samples: GU44L-C, GU44AQ-1, GU44AQ-3, GU44AR-1, GU66A-2, GU66C-7, GU66F-4 Dimensions: Length 62–81 µm, width 39–45 µm. Infundibula 2.5 in 10 µm.

Diagnostics: Broadly oval, the sides nearly straight, sometimes very weakly indented; neither the valve margin nor the keel markedly constricted or convex at the center. Lanceolate central area (circlet) with external ribs, but lacking short striae on the perimeter; puncta completely absent on internal side of circlet.

Comments: Plastids: two lobed plates, as in typical Surirella fastuosa (Fig. 146). Larger, more oval, and more symmetrical than S. fastuosa, and without the short striae on the circlet. These specimens match the California sample described by Ruck & Kociolek (2004), except for the complete lack of puncta on the inner face of the circlet here. Ruck & Kociolek identified their material only as comparable to S. fastuosa “until such time as the type material is examined and the variability in morphology documented.” Given this situation, I list this taxon as separate from S. fastuosa .