Nerudiella goroi, 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 goroi sp. nov.

Figs 104 , 105 , 106 , 107 , 108 , 109

Material examined.

Holotype. ♂ Chile. Concepción: Estero Nonguén , T. Cekalovic coll., 21. IV. 1976 ( MNHNCL) . Paratypes. Chile. Concepción: 6 km S San Pedro , 360 m, A. Newton, M. Thayer coll., 12. XII. 1982, 1 ♂ ( AMNH) . Camino a Ramuncho, Cruce Hualpén , T. Cekalovic coll., 02. XI. 1986, 4 ♂ 1 ♀ 18 imm. ( MACN) . Cautín: Ojos del Caburgua, 16 km NE de Pucón , E. Maury coll., 16. I. 1987, 1 ♂ 7 ♀ 6 imm. ( MACN) . Bellavista, Lago Villarrica , 260 m, R. Schuh, N. Platnick coll., 30. I. 1986, 1 ♂ 4 ♀ 7 imm. ( AMNH) . Cautín: Cerro Ñielol Temuco, IX Región ( Araucaria ), E. Maury coll., 21. I. 1991, 1 ♂ 1 imm. ( MACN) . Cautín: Cerro Ñielol Temuco, IX Región ( Araucaria ), E. Maury coll., 15. I. 1989, 3 ♀ 2 imm. ( MACN) . Termas de Palguin SE de Pucón , E. Maury coll., 17. 01. 1987, 1 ♀ 1 imm. ( MACN) . Estero Chauilco , T. Cekalovic coll., 25. I. 1980, 1 ♀ ( MACN)

Additional material.

Chile. Cautín: Bellavista, Fundo Flor del Lago, 40.6663 ° S, 72.1733 ° W, 270 m, M. Ramírez, F. Labarque coll., 09. 02. 2005, 3 ♂ 5 ♀ 12 imm. ( MACN). Same data, 2 ♀ 31 imm. ( MACN). Same data 3 ♂ 1 ♀ 2 imm. ( MACN). Cautín: Volcán, Villarrica, 1100 m, N. Platnick, O. Francke coll., 28. I. 1985, 2 imm. ( AMNH). Bellavista, Lago Villarrica, N. Platnick, O. Francke coll., 28. I. 1985, 2 ♂ 2 ♀ 4 imm. ( AMNH). Bellavista, Lago Villarrica, 260 m, R. Schuh, N. Platnick coll., 30. 01. 1986, 2 imm. ( AMNH). Same locality N. Platnick, K. Catley, M. Ramírez, T. Allen coll., 20. XI. 1993, 1 ♂ 1 ♀ 1 imm. ( AMNH). Osorno: Pucatrihue, L. Peña coll., 10. II. 1985, 2 imm. ( FMNH).

Etymology.

The specific epithet is bestowed upon the Chilean entomologist Raúl Briones Parra, widely recognized by his nickname “ Goro ”, 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 easily distinguished from the other species in the genus by having two sharp tubercles on the ventral-proximal region of the pedipalp femora. The male genitalia has a pair of ventrally curved capsula externa processes.

Distribution.

Chile: Regions of Bío-Bío, Araucanía, Los Ríos, Los Lagos.

Description of male holotype.

Total length 3.9. Carapace length 1.1, dorsal scutum length 2.5, carapace max. width 1.4, mesotergum max. width 1.6. Appendage measurements. Pedipalps. Trochanter length 0.25, femora length 0.94, patella length 0.60, tibia length 0.70, tarsus length 0.68. Leg I: trochanter (tr) 0.27, femora (fe) 1.37, patella (pa) 0.59, tibia (ti) 0.90, metatarsus (mt) 1.13, tarsus (ta) 0.83. II: tr 0.28, fe 1.75, pa 0.79, ti 1.30, mt 1.50, ta 1.73. III: tr 0.32, fe 1.12, pa 0.50, ti 0.71, mt 0.99, ta 0.86. IV: tr 0.41, fe 1.53, pa 0.84, ti 1.26, mt 1.69, ta 1.04.

Dorsum (Fig. 104 , 105 ). Eta (η) hourglass-shaped dorsal scutum. Ocularium low and rounded. Dorsal scutum microgranulate, with mesotergal areas that lack distinct demarcation but with small setiferous tubercles. Additionally, the mesotergal areas, posterior edge, and free tergites feature a row of small setiferous tubercles.

Chelicerae (Fig. 106 A, B ). Segment I with an acute tubercle on the dorso-distal surface. Segment II bearing scattered setae in ectal and ventral views, with one triangular tubercle prominent from the others in front view.

Pedipalps (Fig. 106 C, D ). Trochanter with a small dorsal and ventral tubercle. Femora bearing three dorsoproximal setiferous tubercles; 4–6 small ventral-distal tubercles and two ventral-proximal spines. Patella with 2–3 small ventral tubercles. Tibia possesses two prominent ventral-mesal spines, in addition to small sparse setiferous tubercles. Tarsus with three mesal and ectal spines in addition to setae and sparse setae.

Legs (Fig. 107 ). Coxa I with 10 setiferous tubercles, II with 18–20 setiferous tubercles, III with three. Spiracles not obstructed by bridges. Smooth surface occupying 1 / 3 of leg II, ¾ of III and <1 / 3 of IV. Smooth area of leg II with 3 tubercles with subdistal setae on each side. Sternum arrow-shaped. Legs covered in small tubercles, astragalus longer than calcaneus on all legs. Tarsal count: 4–8 – 4 – 4.

Penis (Figs 108 , 109 ). Pars distalis characterized by a ventral plate divided into two halves by a small cleft. Each half of the plate bears three pointed macrosetae on the ventral surface and one small macroseta on the dorsal surface. The dorsal surface is covered by a capsula externa, with the upper portion of the plate featuring a wide notch that forms a pair of sharp pointed processes at the base of the genitalia. The capsula externa also exhibits a pair of broad lateral processes. It is slightly lower than the capsula interna, which is laterally flattened and compressed between the lateral processes of the capsula externa. The capsula interna does not have a visible stylus. Additionally, there is a dorsolateral plate connected to the pars basalis.

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

Female measurements. Measurements: Total length 2.50, carapace length 1.1, dorsal scutum length 2.17, carapace max. width 1.55, mesotergum max. width. Appendage measurements: Pedipalps. Trochanter length 0.26, femora length 0.90, patella length 0.55, tibia length 0.57, tarsus length 0.67. Leg I: trochanter (tr) 0.25, femora (fe) 0.96, patella (pa) 0.53, tibia (ti) 0.71, metatarsus (mt) 0.84, tarsus (ta) 0.64. II: tr 0.24, fe 1.27, pa 0.65, ti 0.98, mt 1.12, ta 1.27. III: tr 0.27, fe 0.82, pa 0.41, ti 0.61, mt 0.71, ta 0.69. IV: tr 0.31, fe 1.19, pa 0.74, ti 1.03, mt 1.26, ta 0.79. Tarsal count: 4–8 – 4 – 4.

Figures

Figure 104. Nerudiella goroi 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 105. Nerudiella goroi sp. nov. male, SEM images of habitus A dorsal view B lateral view C, D ventral view. Scale bars: 1 mm (A, B, C); 500 µm (D).

Figure 106. Nerudiella goroi sp. nov. chelicerae: mesal A ectal B pedipalps: mesal C ectal D. Scale bars: 200 µm (A, B); 500 µm (C, D).

Figure 107. Nerudiella goroi sp. nov. legs I A II B III C IV D. Scale bars: 500 µm.

Figure 108. Nerudiella goroi 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, E, G).

Figure 109. Nerudiella goroi 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.