Key for the representatives of the family Heterolatzeliidae Verhoeff, 1897 based on adult males

1 Anterior gonopods with reduced colpocoxites and claw-like massive angiocoxites; posterior gonopods consist of prominent coxites and ovoid or subovoid setulose apical part.......................... Massarilatzelia dugopoljica n. gen., n. sp.

- Anterior gonopods with massive colpocoxites, and straight or sigmoid angiocoxites; posterior gonopods consist of ladleshaped unique coxite, without ovoid or subovoid setulose apical part............................................. 2

2 Colpocoxites and angiocoxites almost same length. Colpocoxites quadrangular, without medial shred (patch)..................................................................................... Heterolatzelia nivalis Verhoeff, 1897

- Angiocoxites longer than colpocoxites. Colpocoxites triangular with medial shred..................................................................................................... Heterolatzelia durmitorensis Gulička, 1968