Stauroneis lewisii Bahls 2012, sp. nov.

• Main Author: Bahls, Loren
• Format: Text
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Chromista; Bacillariophyta; Bacillariophyceae; Naviculales; Stauroneidaceae; Stauroneis; Stauroneis lewisii; Arctic; Antarctic; Cramer; Loren; Northern Rockies; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.5067400; https://zenodo.org/record/5067400

Stauroneis lewisii Bahls, sp. nov. (Figs 5–8) Type :— USA. Montana: Blodgett Lake, Selway-Bitterroot Wilderness, Ravalli County, 46.2505 o N, 114.4544 o W, 2072 m elevation, collected from rocks and sediment by U.S. Forest Service personnel on 10 September 1991. MDC sample 110901; holotype slide MDC P3-4-1, Figs 5–6. Valves narrow lanceolate to linear-lanceolate with gradually attenuated subrostrate apices. Moderately deep pseudoseptum occupies each apex (Fig. 6). Valve length 25–38 µm; valve width 6.1-7.9 µm. Raphe filiform, nearly straight with somewhat inflated proximal ends. Distal raphe ends hooked in same direction. Axial area linear c. 3 x wider than raphe, widening somewhat near central area. Central stauros broad, shaped like a bow tie. Striae strongly radiate throughout, 22–26 in 10 µm. Areolae in striae 24-26 in 10 µm. Etymology :—This species is named after Meriwether Lewis (1774–1809), an early 19 th Century Montana explorer (Danisi 2009). Observations :— Stauroneis lewisii was reported by Bahls (2010: 121) as S. pseudoschimanskii Van de Vijver & Lange-Bertalot (2004: 57), which has elliptic-lanceolate valves with short, broadly subrostrate apices. Besides the type locality, Stauroneis lewisii has been collected from two other small lakes in southwestern Montana: Fred Burr Lake, Selway-Bitterroot Wilderness, Ravalli County, 46.3291 o N, 114.4163 o W; and Bloody Dick Pond #6, Beaverhead County, 45.1119 o N, 113.4447 o W. : Published as part of Bahls, Loren, 2012, Five new species of Stauroneis (Bacillariophyta, Stauroneidaceae) from the northern Rocky Mountains, USA, pp. 1-8 in Phytotaxa 67 (1) on page 2, DOI: 10.11646/phytotaxa.67.1.1, http://zenodo.org/record/5065934 : {"references": ["Danisi, T. C. (2009) Meriwether Lewis. Prometheus Books, New York.", "Bahls, L. (2010) Stauroneis in the Northern Rockies - 50 species of Stauroneis sensu stricto from western Montana, northern Idaho, northeastern Washington and southwestern Alberta, including 16 species described as new. Vol. 4 In: Bahls, L. (Ed.), Northwest Diatoms, Montana Diatom Collection, Helena, 179 pp.", "Van de Vijver, B., Beyens, L. & Lange-Bertalot, H. (2004) The Genus Stauroneis in the Arctic and (Sub-) Antarctic Regions. Bibliotheca Diatomologica, Band 51. J. Cramer, Berlin, 317 pp."]}