Tschaidicancha chaplini, 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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Tschaidicancha chaplini

sp. nov.

3.50. Tschaidicancha chaplini sp. nov.

Figs 6C View Figure 6 , 11G, H View Figure 11 , 21A-C View Figure 21 , 27C, D View Figure 27 , 29A View Figure 29


MALE: Measurements (n =5) DSW: 4.4-4.7 (4.6); DSL: 4.6-5.5 (5.5); CL: 1.9-2.4 (2.2). FIVL: 14.1-14.7 (14.7). ChL: 2.9-4.5 (4.5). Coloration: (Figs 27C View Figure 27 ) Reddish brown. Chelicerae, pedipalpus and trochanters I-IV pale brown. White spots on the lateral margins of the DS. Dorsum: (Fig. 6C View Figure 6 ) Kappa-type DSS. Anterior margin of carapace with median elevation, with granules sparsely distributed. Ocularium with one pair of parallel spines. Carapace with few sparse granules. Areas I-IV with sparse granules (lower density in area III). Area I undivided longitudinally. Area III with two parallel spines, directed posteriorly, located at elevations of integument, totally granulate. Posterior margin of DS with a row of few granules. Lateral margins of DS with sparse granules. Free tergites I-II with a row of granules. Free tergite III with two median spiniform tubercles, longer than the length of this tergite. Chelicerae: (Fig. 6C View Figure 6 ) Swollen. Segment I with three granules. Segment II with few granules; finger with two teeth. Segment III with three teeth. Pedipalpus : With very few granules on the dorsal surface of the femur, tibia and patella. Trochanter with a ventroapical setiferous tubercle. Femur with a ventral row of eight setiferous tubercles, larger in the median portion, distributed throughout the length of femur except the apex; one large proapical spine. Patella with a proapical tubercle. Tibia: retrolateral iiIi, prolateral IiIi. Tarsus: prolateral iIiIi, retrolateral iIiIi. Venter: Coxae I-II with a median row of 4-6 tubercles. Coxae III-IV with granules and setae scattered. Genital area slightly granulate. Free sternites with few granules. Anal operculum few granulate. Legs: (Figs 6C View Figure 6 , 11G, H View Figure 11 ) Coxae I-II each one with a prolateral and a retrolateral apophysis. Coxa III with a prolateral apophysis. Coxa IV with sparse setiferous granules. Trochanters I-IV granulate and unarmed. Femora I-III unarmed, with small granules. Femur IV with granules sparsely distributed in higher density on the ventral side; a row of retrolateral small 36-39 acuminate tubercles. Patellae I-III with few granules. Patella IV with three tiny retroapical tubercles. Tibiae I-III unarmed and few granulate. Tibia IV with a retrolateral row of 16-19 small acuminate tubercles along the basal ½. Tarsal segmentation: (n =3) 8-9 (9), 18, 10-12 (12), 10-14 (14). Penis: (Fig. 21A-C View Figure 21 ) VP subrectangular, long; distal margin slightly convex, with distal-lateral projections; slightly curved in lateral view. MS C1-C3(4) subdistal long and slightly curved; MS A1 long and straight (slightly shorter than MS C and MS B), medially placed; MS B1 sub basal long and straight; MS D1 short and straight, placed near MS C3. Lateral sacs long and apically blunt; with long T3-like microsetae. Stylus laterally flattened, apex slightly inflated, with several apical projections. Dorsal process laterally flattened, with slender apex. Promontory convex. - FEMALE: Measurements (n =3) DSW: 4.5-4.7; DSL: 4.7-5.3; CL: 1.8-2.0. FIVL: 13.8-14.2. ChL: 1.5-1.7. (Fig. 27D View Figure 27 ) Chelicerae smaller than in smaller males. Femur IV unarmed. Tarsal segmentation: (n=3) 8, 16-17, 11-12, 12-14.


Similar to Tschaidicancha scorsesei sp. nov. by the set of the following characteristics: reddish-brown coloration (Fig. 27C View Figure 27 ); femur IV with a retrolateral row with more than 30 small tubercles; tibia IV with a retrolateral row with more than ten small tubercles (Fig. 11G, H View Figure 11 ). Differs from T. scorsesei sp. nov. by the set of the following characteristics: the area I undivided longitudinally; free tergite III with a pair of spiniform tubercles (Fig. 6C View Figure 6 ); tibia IV with more than 15 retrolateral tubercles (Fig. 11G, H View Figure 11 ); VP with distal-lateral projections (Fig. 21A-C View Figure 21 ).

Derivatio nominis.

The specific epithet of masculine gender, in the genitive form, dedicated to the English actor, composer, director and producer Sir Charles Spencer Chaplin (1889-1977), a worldwide icon in the era of silent film through his screen persona "The Tramp".


(Fig. 29A View Figure 29 ) 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 - Paratype 1 ♀, ‘ditto’ (MUBI); Paratypes 1 ♂, 1 ♀, ‘ditto’ (MUSM); Paratypes 3 ♂, 3 ♀, ‘ditto’ (MZSP 36984).