Connection to MySQL server successfully established.

Euastrum inerme Desmid Species Outer Hebrides

Alage Outer Hebrides logo  Algae Outer Hebrides


Phylum: Charophyta   Family: Desmidiaceae

Euastrum inerme (J. Ralfs) P.M. Lundell 1871

Semicells subpyramidate, sinus linear with a slightly dilated apex else closed for the most part. Basal angles obliquely truncate then diverging into a broad lateral lobe, then incurved to the upper lobe. Apex slightly protracted with a deep, closed median incision. Above the isthmus is a noticeable protuberance, above that are two smaller protuberances. In the centre of the semicell is a large scrobiculum.
Cell dimensions: L: 45-60 µm; B: 30-40 µm; Is: 8-13 µm; Th: 20-25; L/B: 1.45-1.70.
An acidophile of boggy habitats and shallow vegetated lochs. A Europe-wide rare species but, interestingly, West & West (1905: 25) say "… but often occurs in great abundance in the west of Scotland, the Outer Hebrides, and the west of Ireland." Recent studies suggest this is no longer the case.

References: 
Coesel, P.F.M. & Meesters, K.J. (2023 second edition) Desmids of the Lowlands.
Lundell, P.M. (1871) De Desmidiaceis, quae in Suecia inventae sunt, observationes criticae.
Ralfs, J. (1848) The British Desmidieae.
Ruzicka, J. (1981) Die Desmidiaceen Mitteleuropas, Volume 1, Part 2.
West, W. & West, G.S. (1905) A Monograph of the British Desmidiaceae, Volume 2.

TOP