Staurastrum teliferum var. gladiosum

(W.B.Turner) Coesel & Meesters, 2013

Most likely ID: n.a.

 

Synonym: Staurastrum gladiosum

 

Sampling location: Lauchsee Moor (Austria)

 

Phylogenetic tree: Staurastrum teliferum var. gladiosum

 

Diagnosis: 

  • cells 3-radiate
  • semi-cells elliptical, with almost straight lateral sides
  • length 36–42 µm, width 34–43 µm (excluding spines)
  • apices slightly convex
  • sinus deep, narrowed at an acute angle
  • in apical view slightly concave sides
  • cell wall with concentric rows of spines
Staurastrum-teliferum-var-gladiosum
Staurastrum teliferum var. gladiosum

I have only found Staurastrum teliferum var. gladiosum once so far, in June 2024 in the Lauchsee Moor in Austria. This variety differs from the main form Staurastrum teliferum by the somewhat flattened, broadly elliptical semi-cells and especially by the spines, which are arranged in concentric rows. This arrangement can be clearly seen in fig. 1 a.

Staurastrum-teliferum-var-gladiosum

Fig. 1 a-d: Staurastrum teliferum var. gladiosum. L = 35 µm (without spines). Different focal planes of a specimen. Note the spines in concentric rows (a). Obj. 100 X.

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