Ayacucho weyrauchi (Roewer, 1952) 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

publication ID


publication LSID


persistent identifier


treatment provided by

Arthropod Systematics & Phylogeny by Pensoft

scientific name

Ayacucho weyrauchi (Roewer, 1952)

comb. nov.

3.27. Ayacucho weyrauchi (Roewer, 1952) comb. nov.

Figs 3F View Figure 3 , 8E, F View Figure 8 , 13C, D View Figure 13 , 28 View Figure 28

Cajamarca weyrauchi Roewer, 1952: 41 (desc.); Roewer 1957: 75 (cit.), fig. 30 (male femur IV); Kury 2003: 144 (cat.).

Cajamarca affinis Roewer, 1957: 75 (desc.), fig. 31 (male femur IV); Kury and Maury 1998: 145 (cit.); Kury 2003: 144 (cat.), syn. n.


MALE: Measurements (n =2) DSW: 4.5; DSL: 4.6-5.0 (5.0); CL: 1.5-1.7 (1.5). FIVL: 4.2-4.5 (4.5). ChL: 1.5-3.0 (3.0). Coloration (in ethanol): Predominantly yellowish. Areas I-IV, posterior margin of DS and free tergites I-IV brown. Dorsum: (Fig. 3F View Figure 3 ) Alpha-type DSS, with wide coda. Anterior margin of DS with median elevation with few sparsely granules. Ocularium with a pair of short spines; with granules between the spines. Carapace with few granules in the lateral regions of the ocularium, predominantly smooth in the posterior region of the ocularium. Areas I-IV few granular. Lateral margins of DS with few sparsely granules. Posterior margin of DS with 10-11 tiny tubercles. Free tergites I-III each one with a row of tiny tubercles with a wider base than their height. Chelicerae: (Fig. 3F View Figure 3 ) Swollen in the largest specimen (the holotype of Cajamarca weyrauchi ); similar to the females in the other male. Segment I granular. Segment II predominantly smooth; finger with one tooth. Segment III with five teeth. Pedipalpus : Small granules distributed on the dorsal surface of the femur and patella. Trochanter with a large ventrodistal setiferous tubercle. Femur with a ventrobasal setiferous tubercle; a ventral row of four or five setiferous tubercles, larger in larger males. Tibia: prolateral iiIi, retrolateral iIi. Tarsus: prolateral IIi, retrolateral Iii. Venter: Coxa I with a median row of six small tubercles. Coxae II-IV smooth. Three tiny apical tubercles between the coxae II-III and III-IV. Genital area smooth. Free sternites with a row of granules. Anal operculum with granules sparsely distributed over its length. Legs: (Figs 3F View Figure 3 , 8E, F View Figure 8 ) Coxae I-III each one with a prolateral and a retrolateral apophysis (largest on coxa II); retrolateral apophysis on coxa II and prolateral apophysis on coxa III fused. Coxa IV with few granules, concentrated more on the distal part, with a prodistal spiniform apophysis. Trochanters I-III smooth. Trochanter IV with 3-4 median dorsal granules and a retroapical acuminate tubercle. Femora I-III with sparse granules throughout their length. Femur IV granular; with a median dorsal row of 5-8 large acuminate tubercles, growing apically in size; a retrolateral row with 3-4 large acuminate tubercles at distal half of this article; a retroventral row of 9-13 small tubercles, some of them similar to granules; a proventral row of 6-7 large acuminate tubercles along the apical portion. Patella I-IV with sparse granulation. Tibiae I-IV granular. Tarsal formula: (n =2) 7, 11-12 (12), 6-7 (6), 8 (?). Penis: (Fig. 13C, D View Figure 13 ) VP with greater width in the median region; distal margin concave; straight in lateral view (except the apical portion). MS C1-C3 subapical long and curved or straight; MS A1-A2 median long and straight. Lateral sacs long and apically acuminated, with long T3-like microsetae. Stylus sinuous, with inflated apex, a long ventral projection and several small apical projections. Dorsal process half the length of the stylus. Promontory convex. - FEMALE: Measurements (n =7) DSW: 3.8-4.1; DSL: 4.2-4.5; CL: 1.1-1.7. FIVL: 3.4-3.6. ChL: 1.3-1.6. Chelicerae similar to that of small males. Pedipalpus femur with a proapical spine. Femur IV with a dorsal row of 3-4 acuminate tubercles, spaced apart from each other; a retrolateral row of granules, with two acuminate tubercles in the median portion; a proventral row of 15-17 small tubercles, larger in the apical portion. All tubercles present in females are smaller than those in males. Tarsal formula: (n =7) 7, 11-13, 5-7, 8.


Similar to Ayacucho bambamarca comb. nov. and A. triarmatus nom. nov. for presenting three rows of acuminate tubercles in the male femur IV (Fig. 8E, F View Figure 8 ). It differs from A. bambamarca comb. nov. and A. triarmatus nom. nov. in having a maximum of four acuminate tubercles in the retrolateral row (Fig. 8E, F View Figure 8 ); smaller tubercles in ocularium; free tergites with small tubercles (with wide base); areas I-IV with few granulation (Fig. 3F View Figure 3 ). It differs from A. bambamarca comb. nov. in having scutal areas unarmed (Fig. 3F View Figure 3 ).


(Fig. 28 View Figure 28 ) PERU. Cajamarca . Cajamarca .

Material examined.

Type material: Of C. weyrauchi : Holotype ♂, ' PERU, Cajamarca , Cajamarca ,| 2,750 m a.s.l., without date, Weyrauch leg. (SMF RII 10128 View Materials /22) - Paratypes 2 ♀, ‘ditto’ (SMF RII 10128 View Materials /22). Of C. affinis : Holotype ♂, ' PERU, Cajamarca , near Cajamarca , 24 km from Cajamarca , road to Celendin, 3,150 m a.s.l., 04/VIII/1956, Weyrauch leg. (SMF RII 11646 View Materials /29) - Paratypes 5 ♀, ‘ditto’ (SMF RII 11646 View Materials /29) .














Ayacucho weyrauchi (Roewer, 1952)

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

Cajamarca weyrauchi

Benedetti & Pinto-da-Rocha 2022

Cajamarca affinis

Benedetti & Pinto-da-Rocha 2022