Stauroneis bovbjergii

Reimer 1990      Category: Symmetrical biraphid
BASIONYM: Stauroneis bovbjergii Reimer 1990

Stauroneis beeskovea

 

Stauroneis boyntoniae

LM scalebar = 10 µm = 80 pixels.



Observations

Contributor: David R.L. Burge | Mark Edlund - June 2016
Length Range: 14-26 µm
Width Range: 3.7-4.6 µm
Striae in 10 µm: 18-20 at the valve center, 20-22 at the ends

Description

Valves are small, narrow and linear, with subrostrate ends. The axial area is narrow. The stauros is bow-tie shaped, commonly with areola present at the valve margins. The raphe is filiform and straight, with weakly inflated proximal ends and unilaterally curved distal ends. Striae are weakly radiate near the valve center, numbering 18-20 in 10 µm. Striae are weakly radiate to parallel at the apices, numbering 20-22 in 10 µm. The striae are composed of areolae numbering 27-29 in 10 µm. Pseudosepta are present.



Original Description

Basionym: Stauroneis bovbjergii
Author: Reimer 1990
Length Range: 14-26 µm
Width Range: 4-4.5 µm
Striae in 10 µm: 18-20 in the center valve, 22 at the ends

Original Description

Valve linear with slightly convex margins and protracted sub-rostrate to rostrate ends. Stauros across valve center and a pseudosepum at each apex. Axial area narrow linear. Central area quadrangular with one or two short striae at the margins. Raphe filiform; proximal raphe ends blunt, distal ends curved slightly in the same direction. Striae radiate becoming mostly parallel, sometimes slightly convergent, at the ends; indistinctly punctate. Length 14-25 um. Width 4-4.5 um. Striae 18-20 in 10 um becoming ca. 22 in the 10 um at ends. Puncta ca. 25-27 in 10 um.

Holotype: ILL #SP 7. Iowa, Dickinson Co., Excelsior Fen # 11. “S. edge of S. knob; in Scirpus shade on moss.” Coll: R.L. Mitchem, July 25, 1972.

Original Images


Cite This Page:
Burge, D., and Edlund, M. (2016). Stauroneis bovbjergii. In Diatoms of the United States. Retrieved October 22, 2017, from http://westerndiatoms.colorado.edu/taxa/species/stauroneis_bovbjergii

Species: Stauroneis bovbjergii

Contributor: David R.L. Burge | Mark Edlund

Reviewer: Sarah Spaulding

Citations

C.W. Reimer. (1982). Four unreported diatom (Bacillariophyceae) taxa from northwest Iowa. Beihefte zur Nova Hedwigia 73: 267-273.

Reimer, C.W. (1990). Diatoms (Bacillariophyceae) from the Excelsior Fen-complex, Dickinson Co., Iowa, with the description of two new taxa. Journal of the Iowa Academy of Science 97(4):146-152.

Links & ID's

Index Nominum Algarum (INA)

Original INA

California Academy of Sciences (CAS)

Stauroneis bovbjergii CAS

North American Diatom Ecological Database (NADED)

NADED ID:

Autecology Discussion

Stauroneis bovbjergii is a taxon only reported from the Excelsior Fen-complex located on the Dugout Creek Wildlife Management Area, Dickinson County, Iowa (Reimer 1990). The Excelsior Fen-complex is an alkali fen, influenced by row-crop agriculture (Reimer 1982) .

Images

Ecology and Systematics of Diatoms course students sampling algal mats at Excelsior Fen.

Credit/Source: David Burge