Saprodinium mimeticum var. obliquum

Kahl, 1932

Most likely ID: n.a.

 

Synonym: n.a.

 

Sampling location: Purren pond

 

Phylogenetic tree: Saprodinium mimeticum var. obliquum

 

Diagnosis: 

  • cell 40–50 µm long
  • body discoidal, laterally compressed
  • posterior end strongly oblique
  • the dorsal tooth with a spine, pointing dorsally
  • the ventral tooth without spine
  • ventral tooth only on right side
  • right between ventral tooth and dorsal spine two spines
  • left two spines and the dorsal spine
  • frontal tooth short
  • one or two spherical macronuclei
  • contractile vacuole in posterior third
Saprodinium-mimeticum-var-obliquum
Saprodinium mimeticum var. obliquum

So far, I have found only a single specimen of Saprodinium mimeticum var. obliquum in the Purren pond in February 2022. Unfortunately, I took only a few photos of the specimen, which presented itself from the right side. The most important feature, which Kahl (1932) also highlights as a difference from the parent form Saprodinium mimeticum, is the strongl oblique posterior end. This is particularly well visible in fig. 1 a. The other features are very similar to the second variety Saprodinium mimeticum var. simplex.

Saprodinium-mimeticum-var-obliquum

Fig. 1 a-d: Saprodinium mimeticum var. obliquum. L = 42 µm. Different focal planes of a specimen from right. Note the strongly oblique posterior end which slopes downward from dorsal to ventral. DS = dorsal spine, FT = frontal tooth. Obj. 100 X.

Download PDF