Identification Key to the Portuguese species of Ommatoiulus based on gonopod structures

1. Paracoxite deeply divided into 2 processes (Fig. 15 D) ........................ O. lusitanus (Verhoeff, 1895)

– Paracoxite not divided ...................................................................................................................... 2

2. Mesomerite reduced, almost half as long as the promerite (Figs 2 C, D, 9D, 19B)........................... 3

– Mesomerite normal to large – sometimes extending beyond the rest of processes (Figs 7 A, 13A). 5

3. Coxa or paracoxite with strong serrations (Figs 2 D, 9D); promerite distally narrowed in a rounded apex; solenomerite with hyaline lamella (Figs 2 E, C, 10)................................................................. 4

– Coxa and paracoxite with no conspicuous serrations; promerite uniformly broad; solenomerite without hyaline lamella (Fig. 18)...................................................................... O. staglae sp. nov.

4. Paracoxite distally expanded, leaf-shaped, and bearing strong serrations on the lateral margin (Figs 9 D, F, 10B); coxa smooth and rounded; solenomerite with one accessory process .................. ....................................................................................................................... O. denticulatus sp. nov.

– Paracoxite distally narrowing, apically with a bulge followed by a pointed tip (Figs 2 C, E, 3B), without serrations; coxa ‘swan wing-shaped’ with 3 blunt processes (Figs 2 C–D, 3C); solenomerite with 2 accessory processes (Fig. 3 C)................................................................... O. alacygni sp. nov.

5. Mesomerite shorter than promerite (e.g., Fig. 18 D); solenomerite with a broad lamella bearing notches and distal ramifications (e.g., Fig. 18 B) ............................................................................... 6

– Mesomerite as long as the promerite, sometimes extending beyond the rest of processes (e.g., Figs 13 A, 24A), solenomerite different, large species....................................................................... 8

6. Promerite with two postero-apical teeth, solenomerite with 3 notches and 4 slender to acuminate ramifications (Fig. 23 B), mesomerite distally expanded mesolaterad (Fig. 23 D)............................... .............................................................................................................................. O. stellaris sp. nov.

– Promerite with one or no apical teeth, solenomerite with one notch and one distal ramification, mesomerite uniformly broad, distally narrowing and curved (Figs 4 C, 18B)................................... 7

7. Promerite with a strong apical tooth, solenomerite long and broad, distally narrower, with a subapical curved acuminate process and an apical subtriangular fold (Fig. 4 C)................................................. ............................................................................................................. O. andalusius (Attems, 1927)

– Promerite with no apical teeth (Fig. 18 D), solenomerite short and broad, with two acuminate asymmetrical processes separated by a lamellar fold (Fig. 18 B) ............ O. porathi (Verhoeff, 1893)

8. Mesomerite strongly expanded into a large distal plate with spines and serrations, solenomerite simple (Fig. 24A)...................................................................................... O. martensi Mauriès, 1969

– Mesomerite distally narrowing or bifurcating, solenomerite complex.............................................. 9

9. Solenomerite divided into 3 processes (a large anterior one, a median hyaline fold and an acuminate posterior one); paracoxite broad, distally expanding (Fig. 5 B–C) .................................................. 10

– Solenomerite more complex, heavily serrated, with a furrow and other accessory branches (Fig. 8 B); paracoxite slender or completely reduced (Fig. 8 C)........................................................................ 12

10. Mesomerite with apical projections, paracoxite expanded, with several distal projections ............11

– Mesomerite without apical projections (Fig. 14 A), paracoxite hammer-shaped (Fig. 14 B) ............... ............................................................................................................................... O. litoralis sp. nov.

11. Promerite with an apical incision and a protruding mesal margin; paracoxite strongly curved ......... ............................................................................................ O. bipartitus (Verhoeff, 1925) (Fig. 24 B)

– Promerite with a regular margin and no apical incision .......... O. moreleti (Lucas, 1860) (Fig. 24 C)

12. Mesomerite distally not bifurcated; paracoxite long slender and curved (Fig. 24 E) .......................... .............................................................................................................. O. fuentei (Brolemann, 1920)

– Mesomerite distally bifurcated; paracoxite short to very reduced (Figs 7 D, 17B, 24D) ................ 13

13. Promerite strongly narrowed distally (Figs 7 B, 8A), apex with a serrated mesal fold and a pointed lateral margin; mesomerite curved from basis and pointing mesad, both apical processes pointing in the same direction (Figs 7 A, D, 8B).................................................................... O. camurus sp. nov.

– Promerite gently narrowed distally, apex with regular margins (Figs 17 A, C, 24D); mesomerite curved from distal third, mainly pointing laterad (Figs 17 B, D, 24D) ............................................ 14

14. Paracoxiteveryreducedwithtransversalstripes,mesomeritedistallywithalongcurvedprocesspointing laterad and a much shorter one pointing posteriad (Fig. 24 D) ...... O. dorsovittatus (Verhoeff, 1893)

– Paracoxite longer, mesomerite apically with subequal ramifications oppositely directed (Fig. 17 B, D) .......................................................................................................... O. oliveirae (Verhoeff, 1893)