Iulidesmus, Silvestri, 1895

Romero-Rincon, Juan & Golovatch, Sergei I., 2024, The millipede genus Iulidesmus Silvestri, 1895 in Colombia (Polydesmida, Paradoxosomatidae, Catharosomatini), Zootaxa 5415 (1), pp. 56-76 : 73

Key to six new species of Iulidesmus in Colombia (based on male characters)

1. Tarsal brushes present.................................................................................. 2

- Tarsal brushes absent.................................................................................. 3

2. Femora with adenostyles in anterior legs................................................................... 4

- Femora without adenostyles; sternal cones traceables between coxae 4–7; ozopores partly visible from above ( Fig. 10 ); sph broadened laterally near apical part ( Fig. 11 )....................................................... I. icni n. sp.

3. Femora with adenostyles in legs 4–7 ( Fig. 3B–E ); sternal cones traceables between coxae 4–7 ( Fig. 3A ); ozopores invisible from above ( Fig. 1 ); su2 poorly defined; lo more strongly flattened ( Fig. 2 )........................... I. garciae n. sp.

- Femora without adenostyles; sternal cones traceable between coxae 3–7; ozopores slightly visible from above ( Fig. 4 ); sph with a spine (k) medially at abour midlength in lateral part ( Fig. 5 )...................................... I. minerus n. sp.

4. Femora with adenostyles in legs 4–6; ozopores partly visible from above......................................... 5

- Femora with adenostyles in legs 4–7; ozopores invisible from above; very small sternal cones traceable between coxae 4–7 ( Fig. 12 ); lm supporting most of sl, much longer and exceeding the ll ( Fig. 13 )......................... I. jeekeli n. sp.

5. Sternal cones traceable between coxae 4–7 ( Fig. 8 ); sph with evident overlapping elements in apical region; medial distal element much longer and larger than lateral distal element ( Fig. 9 )................................. I. sabaneta n. sp.

- Sternal cones traceables between the coxae 3–5 (difficult to see) ( Fig. 6 ); an incomplete distal sulcus on fe, apical part of sph bilobate, with subequal, rounded, end lobes ( Fig. 7 )............................................... I. florezi n. sp.

Figures

FIGURE 1. Iulidesmus garciae n. sp., male holotype (MHN-UPN-MD-220). Habitus of anterior (B), middle (C) and posterior (A) parts of body in ventral view, and habitus of anterior (D), middle (E) and posterior (F) parts of body in dorsal view. Scale bar: 4 mm.

FIGURE 2. Left gonopod of Iulidesmus garciae n. sp., male holotype (MHN-UPN-MD-220). A, D. Mesal view. B, E. Ventral view. C, F. Lateral view. Abbreviations: ca: cannula, cx: coxite, fe: femorite, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm.

FIGURE 3. Iuludesmus garciae n. sp., male holotype (MHN-UPN-MD-220). A. Sternal tubercles between coxae 4–7. B. Leg 4. C. Femur 5. D. Femur 6. E. Femur 7. F. Leg 21. Scale bar: 1 mm.

FIGURE 4. Iulidesmus minerus n. sp., male holotype (ICN-MD-410).A. Habitus in dorsolateral view. B. Habitus in ventrolateral view. Scale bar: 4 mm.

FIGURE 5. Left gonopod of Iulidesmus minerus n. sp., male holotype (ICN-MD-410). A, D. Mesal view. B, E. Ventral view. C, F. Lateral view. Abbreviations: ca: cannula, cx: coxite, fe: femorite, k: spine, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm.

FIGURE 6. Iulidesmus florezi n. sp., male holotype (ICN-MD-397). A. Habitus in dorsal view. B. Habitus in ventral view. Scale bar: 4 mm.

FIGURE 7. Left gonopod of Iulidesmus florezi n. sp., male holotype (ICN-MD-397). A, D. Mesal view. B, E. Ventral view. C, F. Lateral view. Abbreviations: ca: cannula, cx: coxite, fe: femorite, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm.

FIGURE 8. Iulidesmus sabaneta n. sp., male holotype (MHN-UPN-MD-123). A. Habitus in dorsal view. B. Habitus in ventral view. Scale bar: 4 mm.

FIGURE 9. Left gonopod of Iulidesmus sabaneta n. sp., male holotype (MHN-UPN-MD-123). A, D. Mesal view. B, E. Ventral view. C, F. Lateral view. Abbreviations: ca: cannula, cx: coxite, fe: femorite, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm.

FIGURE 10. Iulidesmus icni n. sp., male paratype (ICN-MD-165). A. Habitus in dorsal view. B. Habitus in ventral view. Scale bar: 4 mm.

FIGURE 11. Left gonopod of Iulidesmus icni n. sp., male holotype (ICN-MD-2916). A, D. Mesal view. B, E. Ventral view. C, F. Lateral view. Abbreviations: ca: cannula, cx: coxite, fe: femorite, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm.

FIGURE 12. Iulidesmus jeekeli n. sp., male holotype (MHNG-ARTO-0034037). A. Habitus in dorsolateral view. B. Habitus in ventrolateral view. Scale bar: 4 mm. Photographs taken by Christina Lehmann-Graber (MHNG).

FIGURE 13. Gonopods of Iulidesmus jeekeli n. sp., male holotype (MHNG-ARTO-0034037). A, D. Mesal view of right gonopod. B, E. Posteroventral view of right gonopod. C, F. Lateral view of left gonopod. Abbreviations: ca: cannula, cx: coxite, fe: femorite, ll: lamina lateralis, lm: lamina medialis, lo: apical lobe, pfe: prefemorite, sl: solenomere, sph: solenophore, su1: distofemoral sulcus, su2: postfemoral sulcus. Scale bar: 0.5 mm. Photographs taken by Christina Lehmann-Graber (MHNG).