Stauroneis anceps f. gracilis Rabh. 1864
Length:73.5

Width:12

Striae:22































Collection 1174a

 Other images

 More information



Return to Top Page Return to Genera List Return to Species List

Authority information

Ravh., Fl. Europaea Alg., sect. 1, p. 247. 1864. (Patrick and Reimer 1966).

Other images


More information


  • Synonyms (Patrick and Reimer 1966)
    Stauroneis anceps var. gracilis Brun, Diat. Alpes Jura, p. 89, pl. 9, fig. 2. 1880.


  • Ecology
    Occurs with the nominate variety. (Patrick and Reimer 1966).

    Size ranges and morphology

  • Length is 40-55 micrometers (Patrick and Reimer 1966).
  • Breadth is 8-10 micrometers (Patrick and Reimer 1966).
  • Striae usually not coarser than 26 in 10 micrometers (Patrick and Reimer 1966).
  • Note: The size ranges given by Patrick and Reimer differ from the measurements of our specimen.

  • Other morphological features:
    Valve elongate, elliptical-lanceolate with extremely narrowed capitate ends; otherwise
    as variety anceps. (Patrick and Reimer 1966).