Connection to MySQL server successfully established.

Tetmemorus laevis Desmid Species Outer Hebrides

Alage Outer Hebrides logo  Algae Outer Hebrides


Phylum: Charophyta   Family: Desmidiaceae

Tetmemorus laevis J. Ralfs 1848

First described and illustrated in Ralfs (1848: 146, pl. 24: 3). West & West (1904: 222, pl. 32: 11-16) describe the cells thus: “… semicells very gradually attenuated to the apices; apex fairly broad and rounded, with a deep median incision; cell-wall minutely punctate; chloroplasts with a median series of 3-5 pyrenoids; semicells in side view more attenuated than in front view, especially near the apex.”
Cell dimensions: L: 80-120 µm; B: 20-34 µm; Is: 16-27 µm; L/B: 3.0-4.6.
West & West (l.c.) note: “T. laevis has a world-wide distribution; it is found from sea-level to the snow-line, and also in the waters of warm and hot springs. It is rarely found in the freshwater plankton.” It is relatively common in the Outer Hebrides.

References: 
Coesel, P.F.M. & Meesters, K.J. (2023 second edition) Desmids of the Lowlands.
Ralfs, J. (1848) The British Desmidieae.
West, W. & West, G.S. (1904) A Monograph of the British Desmidiaceae, Volume 1.

TOP