Stauroneis gracilior

Taxon ID: 254
Author: Ehrenberg    
Synonym: Stauroneis anceps f. gracilis



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LM image scalebar = 10 µm = pixels not measured     



Observations: Bart Van de Vijver
Length: 50-60µm
Width: 7,5-9µm
Striae: 21-23 striae in 10µm


Valves elliptical-lanceolate with convex margins and protracted, sometimes even capitate ends (L 50-60µm, W 7,5-9µm, 21-23 striae in 10µm). Axial area narrow, linear. Central area a relatively broad, rectangular fascia, slightly widening towards the valve margins. Raphe filiform, straight with indistinct central pores. Terminal fissures ?-shaped, clearly visible in LM. Transapical striae moderately radiate in the middle, strongly radiate towards the ends.

Morphology: Naviculoid




Only found in one sample: BW321, a small pool with pH 7,2, specific conductance 143µS/cm and nutrient-poor conditions (no phosphate and ammonium measured).Kerguelen (Bourrelly & Manguin 1954, Le Cohu & Maillard 1986), King George Island (Schmidt et al. 1990), South Orkney Islands (Oppenheim 1990, Oppenheim & Greenwood 1990), South Shetland Islands (Björck et al. 1993).



Other sites with Stauroneis gracilior

  • Ile de la Possession (moist habitats), Crozet Archipelago

Original Type Description

Author: Ehrenberg

Original Description:


New combination

Author: Reichardt 1996



Index Nominum Algarum (INA):

  • Original
  • If an INA link is available, it will be shown above
  • The INA is a bibliographic reference "card file" for algal taxonomy, containing nearly 200,000 names of algae (in the broad sense).

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