Key to species of Cortona Oman

1. Aedeagus in ventral view distinctly broadened at or beyond midlength (Fig. 2 G); female sternite VII median lobe with dis- tinctly contrasting dark pigment and occupying less than half total width of sternite (Fig. 11 E–G).......................2

- Aedeagus in ventral view evenly tapered through most of length, at most only slightly broadened preapically (Fig. 8 E); female sternite VII median lobe without distinctly contrasting dark pigment and occupying more than half total width of sternite (Figs 11 H–I)...............................................................................................4

2. Aedeagal shaft in ventral view broad apically with deep emargination (Fig. 2 G); female sternite VII median lobe trilobed at apex (Figs 11 E–F).....................................................................................3

- Aedeagal shaft in ventral view slender and tapered apically (Figs 6 E–F); female sternite VII with median lobe narrow and elongate (Fig. 11 G)..................................................................... Cortona silvai sp. n.

3. Aedeagus with lateral appendages not extended to apex (Figs 2 F–G)................................. Cortona minuta

- Aedeagus with lateral appendages extended nearly to apex (Figs 4 F–G)...................... Cortona catanachae sp. n.

4. Aedeagus with apical appendages distinct, apex of shaft appearing bifid (Fig. 8 E)............ Cortona otamendiensis sp. n.

- Aedeagus with apical appendages vestigial, apex appearing acuminate (Figs 10 C–D)............ Cortona concordica sp. n.