Nerudiella jaimei, 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 jaimei sp. nov.

Figs 110 , 111 , 112 , 113 , 114 , 115

Material examined.

Holotype. ♂ Chile. Malleco. Monumento Natural Contulmo , 350 m, S. Peck, J. Peck coll. ( FMNH) . Paratypes. Chile. Malleco. P. N. Nahuelbuta 1250 m, Berlese, N. Platnick, R. Schuh coll. 19. XI. 1981. 1 ♂ 2 imm. ( AMNH) . Same data, 4 ♂ 4 imm. ( AMNH) . Malleco. Monumento Natural Contulmo , 300 m, N. Platnick, R. Schuh coll. 31. 1. 1986 2 ♀ 4 imm. ( AMNH) . Malleco. Monumento Natural Contulmo , 350 m, S. Peck, J. Peck coll. 13. II. 1985. 5 ♂ 6 ♀ 13 imm. ( FMNH) . 45 KM W Angol, Nahuelbuta N. P. 1500 m, S. Peck, J. Peck coll. 09. XII. 1984. 11 ♂ 6 ♀ 13 imm. ( FMNH) .

Etymology.

The specific epithet is bestowed upon the Chilean entomologist Jaime Pizarro Araya, in recognition to his significant contributions to the field of entomology and his unwavering dedication to the conservation of the Chilean forests. A noun in apposition.

Diagnosis.

This species can be distinguished from the other species of the genus by the morphology of the male genitalia, which includes the capsula externa with a robust process, which forms a dorsally curved plate.

Distribution.

Chile: Araucanía Region (Fig. 4 F ).

Description of male holotype.

Measurements: Total length 4.0, carapace length 1.0, dorsal scutum length 2.5, carapace max. width 1.2, mesotergum max. width 1.7. Appendage measurements: Pedipalps. Trochanter length 0.26, femora length 0.96, patella length 0.59, tibia length 0.74, tarsus length 0.69. Leg I: trochanter (tr) 0.19, femora (fe) 0.70, patella (pa) 0.40, tibia (ti) 0.52, metatarsus (mt) 0.63, tarsus (ta) 0.55. II: tr 0.23, fe 0.91, pa 0.50, ti 0.78, mt 0.80, ta 0.92. III: tr 0.22, fe 0.58, pa 0.34, ti 0.47, mt 0.50, ta 0.53. IV: tr 0.26, fe 0.89, pa 0.51, ti 0.75, mt 0.94, ta 0.63.

Dorsum (Fig. 110 , 111 ). Eta (η) hourglass-shaped dorsal scutum. Ocularium low and rounded in shape. The dorsal scutum microgranulate, and both the opisthosoma and free tergites display rows of small setiferous tubercles. It is worth noting that the tubercle bases of these setiferous tubercles increase in length posteriorly.

Chelicerae (Fig. 112 A, B ). Segment I with a small tubercle on the dorso-distal surface. Segment II bearing sparse small setiferous tubercles, with one triangular tubercle prominent from the others in frontal view.

Pedipalps (Fig. 112 C, D ). Trochanter with two small dorsal and ventral tubercles. Femora bearing three dorsal spines with setae, five ventral-distal and two ventral-proximal. Patella with 2–3 small ventral setiferous tubercles. Tibia covered in small ventral tubercles, with two spines in the ventral-mesal area and three in the ventral-ectal areas. Tarsus with three mesal and ectal spines with subdistal setae in addition to setae and few granules.

Legs (Fig. 113 ). Coxa I with 9–10 setiferous tubercles (two distal tubercles stronger than the others), II with 12–13, III with six or seven, IV with four or five tubercles connected to the opisthosoma. Spiracles not obstructed by bridges. Smooth surface occupying 1 / 3 of leg II, ¾ of III and <1 / 3 of IV. Leg zone II smooth with two or three small tubercles with subdistal setae on each side. Sternum arrow-shaped. Legs covered with small tubercles, astragalus longer than calcaneus in all legs, in leg II the calcaneus is slightly shorter than the astragalus. Tarsal count: 3–6 – 4 – 4.

Penis (Figs 114 , 115 ). Pars distalis with a ventral plate bearing a thin cleft dividing the plate into two lamellae. Each lamella has three pointed macrosetae on the ventral surface and one short macroseta on the dorsal surface; capsula externa covering dorsal surface, with apical part folded dorsally, with a pair of long lateral processes; there is a dorsolateral plate attached to the pars basalis. Capsula externa shorter in length compared to the capsula interna. The capsula interna, on the other hand, is wide in shape, and it features a sharp apical area.

Female. Similar to males, with a shorter pedipalpal femora.

Female measurements. Total length 2.39, carapace length 1.1, dorsal scutum length 2.2, carapace max. width 1.57, mesotergum max. width 2.15. Appendage Measurements: Pedipalps. Trochanter length 0.23, femora length 0.77, patella length 0.50, tibia length 0.52, tarsus length 0.65. Leg I: trochanter (tr) 0.18, femora (fe) 0.72, patella (pa) 0.39, tibia (ti) 0.50, metatarsus (mt) 0.57, tarsus (ta) 0.47. II: tr 0.24, fe 0.90, pa 0.48, ti 0.71, mt 0.79, ta 0.87. III: tr 0.22, fe 0.56, pa 0.32, ti 0, 39, mt 0.49, ta 0.47. IV: tr 0.27, fe 0.81, pa 0.51, ti 0.70, mt 0.92, ta 0.59.

Figures

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 110. Nerudiella jaimei 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.

Figure 111. Nerudiella jaimei sp. nov. male, SEM images of habitus A dorsal view B lateral view C, D ventral view. Scale bars: 500 µm (A, B, C); 200 µm (D).

Figure 112. Nerudiella jaimei sp. nov. chelicerae: mesal A ectal B pedipalps: mesal C ectal D. Scale bars: 200 µm.

Figure 113. Nerudiella jaimei sp. nov. legs I A II B III C IV D. Scale bars: 200 µm (A, C); 500 µm (B, D).

Figure 114. Nerudiella jaimei sp. nov. penis: ventral A, B apical C lateral D, E dorsal F, G. Scale bars: 200 µm (A, D, F); 50 µm (B, C, G); 100 µm (E).

Figure 115. Nerudiella jaimei sp. nov. penis: ventral A apical B lateral C dorsal D. Colors: ventral plate (yellow), capsula externa (blue), capsula interna (red). Scale bars: 50 µm (A, B); 100 µm (C); 200 µm (D).