Eulibitia leda,

Medrano, Miguel & Kury, Adriano B., 2017, Taxonomic revision of the Andean genus Eulibitia Roewer, 1912 (Arachnida, Opiliones, Cosmetidae), with the description of five new species, European Journal of Taxonomy 357, pp. 1-55: 22-27

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Eulibitia leda

sp. nov.

Eulibitia leda  sp. nov.

Figs 15–18View FigView FigView FigView Fig, 33View Fig; Table 2


Paramedian rounded tubercles widely separated in areas I, III and IV ( Figs 15View Fig, 16AView Fig). Ectal borders of protoglyphs conspicuous, triangular and sharp ( Figs 15AView Fig, 16AView Fig). Coda short and wide ( Fig. 15AView Fig). Clavi inguines large ( Fig. 15AView Fig), basichelicerite with large tubercles in the basal part ( Fig. 17BView Fig). Pedipalpal femur wider at half length ( Fig 17EView Fig).

This species is very similar to E. scalaris  in the shape of the ladder mask, but differs by having a short coda with the constriction poorly marked ( Fig. 15AView Fig), the basichelicerite bears larger tubercles ( Figs 15AView Fig, 17BView Fig) and the femur of leg IV is more tuberculated in the ventro-distal region ( Fig. 17View Fig G–H, J). Apophyses of coxa IV acuminate and poorly tuberculated ( Figs 15View Fig, 16AView Fig).


Noun in apposition of Leda, mother of Clytemnestra, Castor, Pollux and Helen of Troy, from Greek mythology. This species has been named Leda to round up the family formed from the union of Zeus and Leda.

Material examined


COLOMBIA: ♂, Santander Department, San Gil, Vereda Resumidero, road to Mogotes, 6°32′28.25′′ N, 73°05′28.75′′ W, 1600 m a.s.l., 30 Mar. 2013, A. García leg. ( ICN-AO 1165).



COLOMBIA: 5 ♂♂, 5 ♀♀, same collection data as for holotype ( ICN-AO 1165.1); 1 ♂, 1 ♀, same collection data as for holotype ( MNRJ 9264).


Male (based on holotype)

MEASUREMENTS. CL = 2.11, AL = 3.29, CW = 3.11, AW = 5.08, Fe IV = 5.19, Ti IV = 3.41.

DORSUM ( Figs 15View Fig, 16AView Fig). Dorsal scutum beta-shaped, with asymmetrical mid-bulge. Areas I, III and posterior margin with two paramedian tubercles, tubercles of posterior margin bifid. Lateral margins with irregular row of minute granules at mid-bulge. Posterior margin of scutum with row of small tubercles. Tergites with row of small tubercles and anal operculum finely granular.

VENTER ( Fig. 15View Fig D–E). Free sternites finely granular; coxae II–IV finely and uniformly granular; coxa I with longitudinal row of tubercles and smooth area corresponding to lace area of pedipalp.

CHELICERAE ( Fig. 17View Fig A–B). Basichelicerite with row of large tubercles from posterior border to ectal side; movable finger with row of ten tubercles, fixed finger with two small basal tubercles and five large tubercles decreasing in size from basal to distal part of finger.

PEDIPALPS ( Fig. 17View Fig C–F). Trochanter with strong ventral process. Femur with pronounced dorsal keel formed by row of tubercles, with ventral row of twelve setiferous tubercles and mesodistal process. Patella with mesal keel without tubercles but with distal process. Shallow slit along tibia mesal surface, separating dorsal and ventral sides.

LEGS ( Figs 16BView Fig, 17View Fig G–J). Coxa IV granulated, with large clavi inguines, larger in females. Trochanter IV with small retro-distal apophysis. Femur IV substraight, with two longitudinal ventral rows of tubercles increasing in size in distal part. Patella IV substraight, with small setiferous tubercles. Tarsal counts: 6–6/11–10/6–6/7–7.

COLOR ( Fig. 15View Fig). Body and appendages color background 51 (Deep Orange) mottled in 44 (Dark Reddish Brown), ladder mask 104 (Pale Greenish Yellow). Trochanters and tarsomeres 67 (Brilliant Orange Yellow).

GENITALIA ( Fig. 18View Fig). VP of penis subrectangular, narrower basally, with distal border concave; dorsal apophysis of glans subsquare to rounded, wattle of stylus long. Shapes and organization of macrosetae as follows: MS C 1– C 2 large, curved and flattened; MS D1–D2 large and straight; MS A 1– A 2 large, straight, cylindrical and located in basal middle of ventral plate; MS B and MS E 1– E 2 ventral, very small and immersed in microsetae. MS B most basal. Microsetae confined to lateral margins, from corners to base, of VP.


Right tubercle of the posterior margin may be absent in some specimens. Tarsal counts: 6; 10–13; 6–7; 7–8. Variation of measurements is given in Table 2.


With larger clavi inguines and longer coda than males. Males with thicker basitarsus (but not notably swollen) ( Fig. 16BView Fig).


Only known from type locality, in the WWF ecoregion Magdalena Valley montane forests ( NT 0136), tropical and subtropical moist broadleaf forest biome, in Santander Department ( Fig. 33View Fig).


University of Copenhagen


Field Museum of Natural History, Botany Department


Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet


Harvard University - Arnold Arboretum


"Alexandru Ioan Cuza" University


Royal Botanic Garden Edinburgh


University of the Witwatersrand


Museu Nacional/Universidade Federal de Rio de Janeiro


Babes-Bolyai University


Universit� d'Alger


Herbarium Messanaensis, Universit� di Messina


Department of Natural Resources, Environment and the Arts