Gomphonemopsis pseudexigua Medlin Gomphonemopsis pseudexigua Medlin and Round (1986): 212, figs. 16–18 — Krzywda et al. (2019); Witkowski et al. (2000): 222, pl. 61, figs. 17, 18; Pienitz et al. (2003): 58, pl. 17, fig. 21. Description Valves linear to narrowly linear lanceolate, length 20.9–26.9 (6–40) µm, width 1.6–1.9 (1.5–5.0) µm. Striae 18–20 (11–22) in 10 µm, elongate to generally round at the poles, slightly parallel to slightly radiate at the apices. Narrow axial area, small rectangular or round central area that reaches the valve margin with a small stria lying in the mantle opposite either side of the central area. Notes The specimens from MHMPP fit well with the morphological summary of Krzywda et al. (2019). iNaturalist ID: 189577227. Mol. data: ERS 27214058, ERS 27214059, ERS 27214060, ERS 27214061, ERS 27214062, ERS 27214063, ERS 27214064, ERS 27214065, ERS 27214066, ERS 27214067, ERS 27214068, ERS 27214069, ERS 27214070 (Fig. 19).

Published as part of Webber, Mark, Humphrey, Elaine, van Asselt, Arjan, Chang, Alice, Morien, Evan & Simon, Andrew D. F., 2026, Diatoms (Bacillariophyta) of the Salish Sea, Northeast Pacific: annotated checklist and new species reports, pp. e 189060 in Biodiversity Data Journal 14 on page e189060, DOI: 10.3897/BDJ.14.e189060