Ayacucho pasolinii, Benedetti & Pinto-da-Rocha, 2022

Benedetti, Alipio Rezende & Pinto-da-Rocha, Ricardo, 2022, Systematic revision and total evidence phylogenetic analysis of the Andean family Metasarcidae Kury, 1994 (Opiliones: Laniatores), with description of two new genera and twenty new species, Arthropod Systematics & amp; Phylogeny 80, pp. 309-388 : 309

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Ayacucho pasolinii

sp. nov.

3.15. Ayacucho pasolinii sp. nov.

Figs 2E View Figure 2 , 7G, H View Figure 7 , 12E, F View Figure 12 , 22A View Figure 22 , 28 View Figure 28


MALE: Measurements (n =1) DSW: 3.2; DSL: 3.6; CL: 1.2. FIVL: 5.4. ChL: 1.0. Coloration: (Fig. 22G View Figure 22 ) Carapace, chelicerae, pedipalpus, legs and central part of areas of dorsal scutum brown; darker spots behind and laterally to the ocularium. Lateral parts and tubercles of areas of DS and lateral margins of DS with yellowish spots. Spines of area III black. Free tergites I-III yellowish. Dorsum: (Fig. 2E View Figure 2 ) Alpha-type DSS, with shallower constrictions (especially constriction II, almost faint). Anterior margin of carapace with median elevation, almost smooth, with very few granules scattered. Ocularium with a median depression little sharped; a pair of spines, with granules in high density in the base. Carapace with few granules concentrated in the lateral regions. Areas I-II and IV with few granules scattered; III with greater quantity of granules than other scutal areas; I-II with a median pair of small tubercles; III totally granulate, with two spines, directed backwards, located at the highest point of the integument; IV with a median pair of small tubercles. Posterior margin of DS smooth with a pair of small median tubercles. Free tergites I-II without granules, with two-three median tubercles. Free tergite III with a pair of large median acuminate tubercles and a pair of smaller lateral acuminate tubercles. Lateral margins of DS with few granules covering its entire length. Chelicerae: (Fig. 2E View Figure 2 ) Slightly swollen. Segment I densely covered with granules. Segment II smooth, with four teeth. Segment III with three teeth. Pedipalpus : dorsal region of the femur, tibia and patella granular. Trochanter with two ventroapical setiferous tubercles. Femur with a row of five ventral setiferous tubercles, except in the apical portion. Tibia: retrolateral iIII, prolateral IiII. Tarsus: retrolateral Iiii, prolateral Iiii. Venter: Coxae I-IV densely covered with granules and small tubercles throughout their surface. Genital area, anal operculum and free sternites granulate. Legs: (Figs 2E View Figure 2 , 7G, H View Figure 7 ) Coxae I-II each one with a prolateral and a retrolateral apophysis; III with a prolateral apophysis, fused with retrolateral apophysis of coxa II; IV smooth. Trochanters I-IV unarmed and few granulate. Femora I-II unarmed and with small granules; III with a ventral retrobasal row of three tubercles; IV with dense granulation; a retrolateral row of eight-nine acuminate tubercles, growing apically occupying the distal ⅓; a prolateral row of seven acuminate tubercles, smaller than those in retrolateral row, covering the distal ⅓; a prodorsal row of eight small tubercles, extending over the distal ⅓; two ventral rows of nine acuminate tubercles each one on the distal half. Patellae I-III unarmed, with few granules; IV granular, with three tiny dorsoapical acuminate tubercles. Tibiae I-IV unarmed and densely granular. Tarsal segmentation: (n=1) 7, 13, 10, 11. Penis: (Fig. 12E, F View Figure 12 ) VP rectangular; distal margin straight; sinuous in lateral view. MS C1-C4 apical long and slightly curved; MS A1-A2 median long and straight (shorter than MS C); MS B1 basal (near the lateral sacs) short and straight. Lateral sacs long, robust and apically blunt, with long T3-like microsetae. Stylus apically inflated, with slight ventral projection and small projections at the apex. Dorsal process long, cylindrical and apically acuminated. Promontory straight. - FEMALE: Measurements (n =2) DSW: 3.1; DSL: 3.7-4.0; CL: 1.5-1.7. FIVL: 5.5-5.7. ChL: 1.5-1.6. Chelicerae slightly smaller than in male. Femur IV armed, but tubercles smaller than in males. Tarsal segmentation: (n=2) 7, 12-13, 9-10, 10-11.


It differs from other species of the genus by the set of following characteristics: dorsal scutal area III with a pair of long spines (Fig. 2E View Figure 2 ; also present in A. spielbergi sp. nov.); longer legs (ratio between FIVL and DSL greater than 1; 1.5 in A. pasolinii sp. nov.); yellowish spots on the lateral margins of the DS, lateral portions and tubercles of the scutal areas I-IV (Fig. 22A View Figure 22 ).

Derivatio nominis.

The specific epithet of masculine gender, in the genitive form, dedicated to the Italian writer and filmmaker Pier Paolo Pasolini (1922-1975).


(Fig. 28 View Figure 28 ) PERU. Pasco. Oxapampa, Parque Nacional Yanachaga-Chemillén.

Material examined.

Type material: Holotype ♂, ' PERU, Pasco, Oxapampa, Parque Nacional Yanachaga-Chemillen , 10°32′42.1″S 75°21′24.4″W, 22/IV/2011, R. Pinto-da-Rocha, A. Benedetti, J. Ochoa & D. Silva leg. (MUBI) GoogleMaps - Paratypes 2 ♀, ‘ditto’ (MZSP 36993).