Fogedia krammeri Witkowski, Lange-Bertalot, Kociolek & M. Kulikovskiy

Fogedia krammeri Witkowski et al. (2010): 50, figs. 1, 2 — Kim et al. (2022).

Description

Valves moderately variable in outline, from broad-elliptic or broadly elliptic-lanceolate to linear-elliptic, with ends cuneate and terminus shortly protracted and subrostrate. Length 23.5–28.2 (20–30) μm, width 11.7–12.0 (9.5–12.0) μm. Raphe slightly lateral, with two minor undulations at one-quarter distance from central endings and one-quarter distance from terminal endings. External central raphe endings expanded; terminal raphe endings short and slightly bent in same direction. Axial area narrow, linear throughout. Central area forming a shortened, almost rectangular fascia connected to lateral area, with transapical striae interrupted in marginal part on either side. Striae subparallel to slightly radiate proximally to the ends and becoming more strongly radiate distally, where they are very slightly denser at 11–12 (10–12) in 10 μm. Lineolae of the striae comparatively coarse, discernible by LM, 27–30 (26–29) in 10 μm.

Diagnosis

This specimen has similarities to both Fogedia krammeri and F. finmarchica (Cleve 1895: 28) (Van der Werff and Huls (1975): P. D G XVI. 109; Hendey (1964): 198, pl. 30, fig. 5; Riznyk (1973): 126, pl. 11, fig. 7; Sims (1996): pl. 141, fig. 12; Witkowski et al. (1997)). As noted in Witkowski et al. (2010), F. finmarchica has a more lanceolate outline and a higher lineolae density of 35–40 in 10 μm, which is very difficult to resolve by LM. For the MHMPP specimens observed with LM, the valve outline is more broadly elliptic than drawings in the literature for F. finmarchica; the lineolae can be resolved and are 27 in 10 µm, matching data for F. krammeri and the SEM image from the SHW specimen shows an areolae density of 30 in 10 µm. Additionally, the undulations in the raphe of the SHW specimen (SEM) match the undulations in the images of specimens from San Francisco Bay (Witkowski et al. 2010). Further, the expansion of the raphe endings are more pronounced in F. krammeri, matching our specimens. Lastly, most images of F. finmarchica show a pronounced lanceolate outline. From these criteria, we place our specimens in F. krammeri. This species was previously reported and first described in San Francisco Bay by Witkowski et al. (2010) and was, as far as can be ascertained before this report, the only known locality for F. krammeri.

Notes

iNaturalist ID: 312508075, 323689358 (Fig. 18).