Image © Alfred van Geest
Cell of Actinotaenium curtum. Notice a shallow sinus and semicells that gradually attenuate from that sinus towards the poles.
Cell dimensions (L x B): 48 x 22 µm
Among the species of the genus Actinotaenium, A. curtum can be readily recognized by its medium-sized, somewhat fusiform cells consisting of semicells that gradually attenuate from the cell sinus towards the narrowly rounded poles. Often, in optical section of the cell wall a distinct apical pit is to be seen. Like most species of this genus A. curtum has a semi-atmophytic way of life, being particularly found in ephemeral puddles and on wet substrates. In the Netherlands it is only incidentally encountered.
Dead, almost empty cell of Actinotaenium curtum. Notice scattered, fine cell wall pores and deep apical pit.
Image © Koos Meesters
A couple of cells of A. curtum. Notice stelloid chloroplasts.
Image © Jan Šťastný (after Czech material)
SEM picture of A. curtum. Notice scattered, fine cell wall pores.