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Stauroneis boyntoniae

L.L.Bahls 2013      Category: Symmetrical biraphid

Stauroneis bovbjergii


Stauroneis bryocola

LM scalebar = 10 µm = 80 pixels.


Contributor: Loren Bahls - April 2013
Length Range: 31-52 µm
Width Range: 7.6-10.6 µm
Striae in 10 µm: 28-32


Valves are broadly lanceolate, with narrow subrostrate to apiculate apices. The stauros is narrow and rectangular. The raphe is lateral, with straight proximal ends that are weakly expanded. The distal raphe fissures are hooked in the same direction. Striae are weakly radiate near the valve center, becoming more strongly radiate towards the apices. Areolae are transapically elongated and irregularly spaced, 24-30 in 10 µm.

Original Description

Author: L.L.Bahls 2013
Length Range: 31-52 µm
Width Range: 7.6-10.6 µm
Striae in 10 µm: 28-32

Original Description

Valves broadly lanceolate with narrow subrostrate to apiculate apices. Valve length 31–52 μm; valve width 7.6–10.6 μm. Axial area narrow. Stauros narrow but wider than the axial area, rectangular. Raphe lateral with straight, weakly expanded proximal ends. Striae weakly radiate near the valve center, more strongly radiate toward the apices, 28–32 in 10 μm. Areolae transapically oblong and irregularly spaced, 24–30 in 10 μm.

Original Images

Cite This Page:
Bahls, L. (2013). Stauroneis boyntoniae. In Diatoms of the United States. Retrieved May 22, 2018, from

Species: Stauroneis boyntoniae

Contributor: Loren Bahls

Reviewer: Sarah Spaulding


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. Northwest Diatoms, Volume 4. The Montana Diatom Collection, Helena, 172 pp.

Bahls, L. (2013). New diatoms (Bacillariophyta) from western North America. Phytotaxa 82(1): 7-28.

Hustedt, F. (1959). Die Kieselalgen Deutschlands, Osterreichs und der Schweiz, 2. Teil. In: Kryptogamen-Flora von Deutschlands, Osterreichs und der Schweiz, (Dr. L. Rabenhorst, ed.), Band VII(2). Reprint 1977, Otto Koeltz Science Publishers, Koenigstein, 845 pp.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

North American Diatom Ecological Database (NADED)


Autecology Discussion

Stauroneis boyntoniae is known only from the type locality, a lake high in the Wind River Range of Wyoming. Environmental data are not available for this lake.


Lower Twin Lake, Wind River Range, Sublette County, Wyoming: type locality of Stauroneis boyntoniae.

Credit/Source: Beverly Boynton