Mistralia, 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

Genus Mistralia gen. nov.

Figs 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43

Nuncia [part] (only references to Nuncia verrucosa ): Maury 1990: 106; Maury 1992: 5; Acosta and Maury 1998: 579; Kury 2003: 22.

Etymology.

The generic epithet is a reference to the Chilean poet, diplomat, and educator Gabriela Mistral (1889–1957). Feminine grammatical gender.

Diagnosis.

It differs from all other genera in Triaenonychidae by the morphology of the male genitalia, where the capsula interna features a lateral plate formed by a projection of the pars basalis onto the pars distalis. The dorsal scutum is covered in sharp tubercles ( M. ramirezi sp. nov.) or wart-shaped ( M. verrucosa ). Ocularium with an apical apophysis.

Type species.

Nuncia verrucosa Maury, 1990

Included species.

Mistralia ramirezi sp. nov., Mistralia verrucosa comb. nov.

Distribution.

Argentina: Neuquén, Río Negro. Chile, Regions: Bío-Bío, Los Lagos (Fig. 4 B ).

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 35. Mistralia ramirezi. sp. nov. habitus, male A dorsal view B lateral view C ventral view D leg I E pedipalp ectal F pedipalp mesal. Scale bars: 1 mm (A – D); 500 µm (E, F).

Figure 36. Mistralia ramirezi sp. nov. Penis ventral A lateral B dorsal C. Capsula interna (CI), Capsula externa (CE), dorsolateral plate (DL), ventral plate (VP), muscle (MU). Scale bar: 100 µm.

Figure 37. Mistralia ramirezi 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.

Figure 38. Mistralia verrucosa comb. 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 B, see Fig. 3.

Figure 39. Mistralia verrucosa comb. 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 40. Mistralia verrucosa comb. nov. chelicerae: mesal A ectal B Pedipalps: mesal C ectal D. Scale bars: 200 µm (A, B); 500 µm (C, D).

Figure 41. Mistralia verrucosa comb. nov. legs I A II B III C IV D. Scale bars: 1 mm.

Figure 42. Mistralia verrucosa comb. nov. penis: ventral A, B apical C lateral D, E dorsal F, G. Scale bars: 200 µm (A, D, F); 100 µm (B, E, G); 50 µm (C).

Figure 43. Mistralia verrucosa comb. nov. penis: ventral A apical B lateral C dorsal D. Colors: ventral plate (yellow), capsula externa (blue), capsula interna (red). Scale bars: 200 µm (A); 50 µm (B); 100 µm (C, D).