Genus Ommatoiulus Latzel, 1884

Archiulus Berlese, 1886, preoccupied.

Mesoiulus Verhoeff, 1893, preoccupied.

Palaioiulus Verhoeff, 1894 .

Schizophyllum Verhoeff, 1895 .

This is a large genus; 47 European species are included here, mostly from the Iberian Peninsula, where many new species are currently being found. On the other hand, many species have quite variable gonopods, and some of the species recognized here may turn out to be synonyms of others.