Nerudiella quenes, Porto & Derkarabetian & Giribet & Pérez-González, 2024

Porto, Willians, Derkarabetian, Shahan, Giribet, Gonzalo & Pérez-González, Abel, 2024, Systematic revision of the South American “ Nuncia ” (Opiliones, Laniatores, Triaenonychidae), ZooKeys 1207, pp. 1-149 : 1-149

Nerudiella quenes sp. nov.

Figs 140 , 141

Material examined.

Holotype. ♂ Chile. Curicó Quebrada in front of Los Queñes, 34.99614 ° S, 70.80994 ° W, 665 m A. Ojanguren, A. Pérez-González, M. Ramírez, G. Azevedo, W. Porto coll., 10. I. 2018 ( MNHNCL) . Paratypes. Chile. Curicó: Quebrada in front of Los Queñes , gorge in front of Los Queñes , 34.99614 ° S, 70.80994 ° W, 665 m, A. Ojanguren, A. Pérez-González, M. Ramírez, G. Azevedo, W. Porto coll., 10. I. 2018, 1 ♀ 3 imm.

Etymology.

The specific epithet refers to the type locality of the species, the department of Los Queñes, located in the commune of Romeral, province of Curicó, Chile. Noun in apposition.

Diagnosis.

This species can be distinguished from the other species in the genus by the morphology of the male genitalia, which includes the robust capsula externa with a “ V ” - shaped slit and long capsula interna with a triangular apical portion.

Distribution.

Chile: Maule Region (Fig. 4 F ).

Description of male holotype.

Measurements: Total length 2.0, carapace length 0.84, dorsal scutum length 1.7, carapace max. width 12, mesotergum max. width 1.6. Appendage measurements: Pedipalps. Trochanter length 0.22, femora length 0.79, patella length 0.43, tibia length 0.56, tarsus length 0.66. Leg I: trochanter (tr) 0.21, femora (fe) 0.87, patella (pa) 0.47, tibia (ti) 0.69, metatarsus (mt) 0.77, tarsus (ta) 0.66. II: tr 0.20, fe 1.1, pa 0.55, ti 0.86, mt 0.96, ta 1.2. III: tr 0.28, fe 0.75, pa 0.34, ti 0.58, mt 0.70, ta 0.60. IV: tr 0.30, fe 1.1, pa 0.53, ti 0.85, mt 1.1, ta 0.66.

Dorsum (Fig. 140 ). Eta (η) hourglass-shaped dorsal scutum. Low ocularium. Dorsal scutum microgranulate, without clear delineation of areas.

Chelicerae. Segment I with a small tubercle on the dorso-distal surface. Segment II with a frontal tubercle and bearing few setae.

Pedipalps. Trochanter with a small ectal and dorsal tubercles. Femora with two prominent ventroproximal spines and three prominent dorsal spines. Patella with two ventral setiferous granules. Tibia with three ectal and two mesal spines with subdistal setae, with scant granules in ventral view. Tarsus with four ectal and three mesal spines with subdistal setae.

Legs. Coxa II with ~ 8 rounded setiferous tubercles. Spiracles not obstructed by bridges. Sternum arrow-shaped. Legs I – IV covered in setae, tarsal area, and calcaneus densely setose. Tibiae I – III with a ventral and dorsal row of small setiferous tubercles, IV with a row of four distal-ventral tubercles with setae. Calcaneus smaller than astragalus, ≥ 3 × smaller (leg I), 4 × (II, III), and 5 × (leg IV). Tarsal count: 3–6 – 4 – 4.

Penis (Fig. 141 ). Pars distalis with a large ventral plate bearing a cleft that divides the plate into two lamellae. Each lamella has three pointed macrosetae on the ventral surface and one macroseta on the dorsal surface; capsula externa covering dorsal and lateral surfaces, having a cleft dividing dorsal fold into two halves; there is a dorsolateral plate attached to the pars basalis. Capsula interna longer than the capsula externa, with a visible stylus in its apical portion.

Female. Similar to male, with shorter pedipalpal femora.

Female measurements. Total length 2.07, carapace length 0.89, dorsal scutum length 1.72, carapace max. width 1.24, mesotergum max. width 1.77. Appendage measurements: Pedipalps. Trochanter length 0.19, femora length 0.76, patella length 0.47, tibia length 0.50, tarsus length 0.68. Leg I: trochanter (tr) 0.22, femora (fe) 0.84, patella (pa) 0.44, tibia (ti) 0.65, metatarsus (mt) 0.71, tarsus (ta) 0.64. II: tr 0.24, fe 1.09, pa 0.51, ti 0.87, mt 0.95, ta 1.3. III: tr 0.23, fe 0.75, pa 0.35, ti 0.60, mt 0.72, ta 0.61. IV: tr 0.31, fe 1.08, pa 0.57, ti 0.93, mt 1.16, ta 0.68.

Figures

Figure 3. Phylogenetics relationships of Triaenonychidae, with clade names as discussed in the main text. Phylogeny is derived from the IQ-TREE analysis. Nodes without circles have < 95 % bootstrap support to AH-aLR and UFBoot.

Figure 4. Maps showing the distribution of the species used in this work. South America (Chile and western Argentina inset). Chile in green, Argentina / South America in grey. Terrestrial ecoregions (following Olson et al. 2001) highlighted in yellow (Chilean Matorral) and orange (Valdivian temperate forests).

Figure 140. Nerudiella quenes sp. nov. habitus, male A dorsal view C lateral view E ventral view. Female B dorsal view D lateral view F ventral view. Scale bars: 1 mm. Species of Clade C, see Fig. 3.

Figure 141. Nerudiella quenes sp. nov. Penis ventral A lateral B dorsal C capsula interna (red), Capsula externa (blue), dorsolateral plate (brown), ventral plate (green). Scale bar: 100 µm.