
Trigoniophthalmus alternatus duo
Slightly smaller than Machilis germanica and fairly uniform in the colour pattern of the scales. Eyes are evenly brownnish and the triagngular black ocelli are placed under the central corners of the eye (on the "nose").
The greyish specimen on the lower left of this image is getting ready to moult. Microcoryphia keep on moulting and growing as long as they live, also after reaching adulthood, which is quite unusual in "Insects" (there is some discussion if these should be classified as such).

Trigoniophthalmus alternatus is a species of bristletail native to Europe, Northern Asia (excluding China) and introduced in North America.