Ayacucho spiniger (Roewer, 1957) 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 spiniger (Roewer, 1957)

comb. nov.

3.21. Ayacucho spiniger (Roewer, 1957) comb. nov.

Figs 3B View Figure 3 , 7Q, R View Figure 7 , 16 A-C View Figure 16 , 23A, B View Figure 23 , 28 View Figure 28

Palcares spiniger Roewer, 1957: 72 (desc.), fig. 4 (dorsal habitus, femur IV), 5 (details of femur IV armature), 6 (pedipalpus); Kury 2003: 145 (cat.)

Palcares serrifemur Roewer, 1959: 70 (desc.) fig. 2A (dorsal habitus, femur IV), 2b (details of femur IV armature); Kury 2003: 145 (cat.), syn. n.


MALE: Measurements (n =4) DSW: 3.4-3.8 (3.7); DSL: 4.2-4.6 (4.6); CL: 1.4-1.5 (1.4). FIVL: 4.9-5.9 (5.9). ChL: 1.3-2.7 (2.7). Coloration: (Fig. 23A View Figure 23 ) Dorsal scutum and legs yellow-orange. Anterior and posterior margins of DS and free tergites darker. Dorsum: (Fig. 3B View Figure 3 ) Alpha-type DSS, with shallower constriction II (almost faint). Anterior margin of DS with median elevation completely covered by granules. Ocularium covered with tiny granules and two long spines. Carapace densely covered by tiny granules. Areas I-IV densely covered with small granules; I with a pair of small spiniform tubercles; II and IV each one with a pair of tubercles twice the size of those on area I; III with pair of spines. Lateral margins of dorsal scutum covered with minute granules. Posterior margin of dorsal scutum with a small to slightly larger granules, armed with 2-3 spines; a single tubercle located to the right of the pair of spines, when present. Free tergites covered with granules of different sizes and armed with spines. Free tergite I with a pair of spines; II with 2-3 spines, two large and one three times lower; III with three spines. Anal operculum with three tubercles. Chelicerae: (Fig. 3B View Figure 3 ) Swollen in large males (swollen in holotype); similar to females in small males. Segment I densely covered with granules. Segment II predominantly smooth, with setae at certain points of the frontal face, with two teeth on finger. Segment III with one tooth. Pedipalpus : With small granules distributed mainly on the dorsal surface of the femur, tibia and patella. Trochanter with a ventrodistal setiferous tubercle. Femur with a ventrobasal setiferous tubercle and a row of six ventral setiferous tubercles. Venter: Coxae I-IV with granules sparsely distributed. Genital area almost smooth. Free sternites I-III with rows of small tubercles. Genital operculum granulate. Legs: (Figs 3B View Figure 3 , 7Q, R View Figure 7 ) Coxae I-II each one with a prolateral and a retrolateral apophyses; III with a retrolateral apophysis; IV with granules distributed more densely on the prolateral face and an apical prodorsal apophysis. Trochanters I-IV with sparsely distributed granules. Femora I-III granular. Femur IV slightly sinuous, granular; with a retrolateral row of 15 tubercles along the apical ⅔ and a prolateral row of 12-13 tubercles along the apical ½; retro and prolateral tubercles size growing apically; the smallest tubercles are short and blunt, while the largest are long and with an approximately straight or lanceolate apex. Patella IV with granules distributed throughout its length and with three dorsoapical tubercles. Tibiae I-IV with sparse granules. Tarsal segmentation: (n =8) 6-8 (7), 11-14 (11), 7-8 (7), 8-9 (8). Penis: (Fig. 16A-C View Figure 16 ) VP rectangular; distal margin slightly concave; large lateral projections. MS C1 -C3 subapical long and apically curved; MS A1 sub basal long and straight; MS B1 sub basal long and straight (MS A1 and MS B1 shorter than MS C1-C3); MS D1 short, dorsally placed, next to MS A. Lateral sacs long and with blunt apex; with long T3-like microsetae. Stylus dorsally curved, with subapical ventral projection. Dorsal process long and tapered. Promontory convex. - FEMALE: Measurements (n =4) DSW: 3.4-3.8; DSL: 4.2-4.6; CL: 1.4-1.5. FIVL: 4.9-5.5. ChL: 1.3-1.6. (Fig. 23B View Figure 23 ) DSS with constriction II well marked. Granules of ocularium smaller than in male. Pedipalpal femur with a proapical spine, absent in males. Femora IV unarmed. Dorsodistal apophysis of coxa IV slightly lower than in male. Tarsal segmentation: (n =4): 7-8, 10-13, 7-9, 8.


Similar to Ayacucho inermis comb. nov. because of two rows of tubercles on the femur IV (pro and retrolateral; Fig. 7Q, R View Figure 7 ). Differs from Ayacucho inermis comb. nov. because femur IV with some lanceolate tubercles (Fig. 7Q, R View Figure 7 ); ventral plate of penis with conspicuous lateral projections; long MS C on VP; lateral sacs with long T3-like microsetae, dorsal process long in relation to stylus (Fig. 16A-C View Figure 16 ).


(Fig. 28 View Figure 28 ) PERU. Junín. Campañillaya. Hacienda Maraynioc. Palca

Material examined.

Type material: Of P. spiniger : Holotype ♂, ' PERU, Junín, Campañillaya, near to Palca in Rio Tarma , 2,600 m a.s.l., 06/I/1955, Weyrauch leg. (SMF RII 11418 View Materials /24). Of P. serrifemur : Holotype ♂, ' PERU, Junín, Hacienda Maraynioc, east Tarma, Chanchamayo bay , 3,500 m a.s.l., 10/X/1956, Weyrauch leg. (SMF RII 12764 View Materials /35) - Paratype 1 ♀ ‘ditto’ (SMF RII 12764 View Materials /35) . Additional material: 3 ♂, 3 ♀ ' PERU, Junín, Palca , 11°21′28.9″S 75°33′23.9″W, 19/IV/2011, R. Pinto-da-Rocha, A. Benedetti, J. Ochoa & D. Silva leg. (MUBI) GoogleMaps ; 3 ♂, 2 ♀, ‘ditto’ (MUSM); 7 ♂, 5 ♀ ‘ditto’ (MZSP 36980).














Ayacucho spiniger (Roewer, 1957)

Benedetti, Alipio Rezende & Pinto-da-Rocha, Ricardo 2022

Palcares spiniger

Benedetti & Pinto-da-Rocha 2022

Palcares serrifemur

Benedetti & Pinto-da-Rocha 2022