So far, I have found Trichocerca longiseta exclusively in the Simmelried among floating plants. With an average length of 400–500 µm and the conspicuous long left toe, the specimens in the samples are very noticeable. Most specimens in my population were colorless, yellowish, and sometimes intensely orange (s. fig. 3).

Besides the long left toe, two spines on the apical margin are an important identification feature. The more slender spine is about twice as long as the smaller and broader spine (s. figs. 1a and 1 b). Often, the stomach of the specimens is conspicuously yellow, orange, green, or sometimes also red. There is no information in the literature about the diet of Trichocerca longiseta, but it is suspected that it feeds on dinoflagellates, chrysophytes, and flagellated algae, which also inhabit the water plants.

More images and information on Trichocerca longiseta: Michael Plewka-Freshwater life-Trichocerca longiseta