Libitia, Simon, 1879

Medrano, Miguel, Ázara, Ludson Neves de & Kury, Adriano Brilhante, 2020, The short-legged Andean cosmetids revisited: the genus Libitia Simon, 1879 with description of two new species (Opiliones, Cosmetidae), European Journal of Taxonomy 634, pp. 1-25 : 5

Key to males of Libitia

1. Pattern of blots invading carapace and area and occupying entirely area I of mesotergum ( Fig. 9A, C, E ) ...................................................................................................................... L. gandalf sp. nov.

– Pattern of blots restricted to mesotergum ( Figs 2 , 6 , 11 A–B) .......................................................... 2

2. Pattern of blots invading area I and part of II, forming an irregular heart-shape ( Figs 5 A–B, 6) ...... .................................................................................................................. L. cordata ( Gervais, 1844)

– Pattern of blots only in lateral margins of mesotergum forming the rails of a ladder not invading areas I or II, sometimes extremely reduced ( Figs 2 , 11 A–B) ........................................................... 3

3. Coda shorter than mid-bulge ( Fig. 11A ); maximum width of dorsal scutum equal to maximum length ( Fig. 11A ); legs podomeres with same color of trochanter ( Fig. 11 B–F); three basitarsomeres in legs I and III; penis with MS D1 equally distanced from MS D2 and MS C2 ( Fig. 12 A–D) .................... .............................................................................................................................. L. iguaque sp. nov.

– Coda as long as mid-bulge ( Fig. 1A ); maximum width of dorsal scutum shorter than maximum length ( Fig. 1A ); legs podomeres darker than trochanter ( Fig. 1 B–F); two basitarsomeres in legs I and III; penis with MS D1 closer to MS C2 than MS D2 ( Fig. 4 ) ...................................................... ............................................................................................ L. bipunctata Sørensen, 1932 comb. rev.

Figures

Fig. 9. Libitia gandalf sp. nov., holotype, ♂ (IAvH-I-69), habitus. A. Dorsal view. B. Dorsal view, anterior margin of carapace. C. Dorsal view, panoramic. D. Frontal view. E. Right lateral view. F–G. Right femur IV, dorsal and ventral view, respectively. Scale bars = 1 mm.

Fig. 2. Libitia bipunctata Sørensen, 1932, variation of spot pattern on dorsal scutum. A–D. ♂♂. A. IAvH-I-67. B. ICN-AO 468. C. ICN-AO 419. D. IAvH-I-87. E–H. ♀♀. E. IAvH-I-76. F–H. UNAL- AO 420. Scale bar = 1 mm.

Fig. 6. Libitia cordata (Gervais, 1844), variation of spot pattern on dorsal scutum. A–D. ♂♂. A. ICN-AO 1040. B. ICN-AO 421. C. ICN-AO 1040. D. ICN-AO 1040. E–H. ♀♀. E–F. ICN-AO 421. G–H. ICN-AO 1040. Scale bar = 1 mm.

Fig. 11. Libitia iguaque sp. nov., ♂ (MNRJ 19765), habitus. A. Dorsal view. B. Dorsal view, panoramic. C. Frontal view. D. Lateral right view. E–F. Right femur IV, dorsal and ventral view, respectively. Scale bars = 1 mm.

Fig. 5. Libitia cordata (Gervais, 1844), ♂ (ICN-AO 1040), habitus. A. Dorsal view. B. Dorsal view, panoramic. C. Frontal view. D. Lateral right view. Scale bars = 1 mm.

Fig. 12. Libitia iguaque sp. nov., ♂ (MNRJ 17379). A–D. Distal part of penis. A. Dorsal view. B. Ventral view. C. Left lateral view. D. Right lateral view. E. Right pedipalp, ventral view. F–G. Left chelicera, dorsal and frontal view, respectively. Scale bars: A–D = 50 μm; E–F = 200 μm; G = 100 μm.

Fig. 1. Libitia bipunctata Sørensen, 1932, ♂ (ICN-AO 1040), habitus. A. Dorsal view. B. Dorsal view, panoramic. C. Frontal view. D. Lateral right view. E–F. Right femur IV, dorsal and ventral view, respectively. Scale bars = 1 mm.

Fig. 4. Libitia bipunctata Sørensen, 1932, ♂ (ICN-AO 419), distal part of penis. A. Dorsal view B. Right lateral view. C. Ventral view, macrosetae colorised and numbered. D. Stylus, dorsal view. Scale bars: A–C = 50 μm; D = 20 μm.