Surirella cf. fastuosa Ehrenberg

Surirella cf. fastuosa Ehrenberg , sensu Ruck & Kociolek 2004 Figs 146–149 View Figures 139–149

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 View Figures 139–149 ). 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 .