(327PImin) Proisotoma minima (Absolon, 1901)
*inaequalis (Bagnall, 1949)
Proisotoma minima is a moderately common and widespread species. It is white with traces of blue pigment on the head and has eyes composed of 5+5 ocelli (Fig. 1). The manubrium has 1+1 ventral setae, the dens has six ventral setae and the mucro has three teeth (Fig. 2). Proisotoma minima has been collected mainly from acidic leaf litter.
Fig. 1: Head of Proisotoma minima collected from Studland Heath in November 1963 by Peter Lawrence. The post-antennal organ (PAO) is small and broadly oval and the eyes each have 5 ocelli (*).
Fig.2: Furca of Proisotoma minima collected from Morden Bog in November 1963 by Peter Lawrence. The manubrium (ma) has 1+1 ventral setae (large *), the dens has six ventral setae (small *) and the mucro has three teeth.