Eusarcus insperatus B. Soares

Hara, Marcos Ryotaro & Pinto-Da-Rocha, Ricardo, 2010, Systematic review and cladistic analysis of the genus Eusarcus Perty 1833 (Arachnida, Opiliones, Gonyleptidae) 2698, Zootaxa 2698, pp. 1-136 : 76-78

Eusarcus insperatus B. Soares

( Figs. 22, 44E,F, 50A)

Eusarcus insperatus B. Soares 1944a: 222 (cit), 228, fig. 4; 1944b: 286 (cit); Mello-Leitão 1945: 154 (cat), 157 (key), fig. 15; B. Soares 1946: 519 (cat); Soares & Soares 1954b: 260 (cat); Kury 2003a: 169 (cat); (ma holotype; “Alto da Serra, [Santo André], São Paulo; F. Lane & B.M. Soares leg.; 18.iii.1943; MZSP 430”; examined).

Material examined: BRAZIL. São Paulo: Santo André ( Alto da Serra ), F. Lane & B.A.M. Soares leg., 18.iii.1943, ma holotype ( MZSP 430 ) ; Salesópolis ( Estação Biológica de Boracéia ), A.D. Brescovit et al. leg., ix.2000, 1 ma ( IBSP 1509 ) ; idem, Eq. Biota leg., 18–24.v.2001, 1 fe ( IBSP 4283 ) ; idem, 1 ma ( IBSP 4285 ) .

Diagnosis: E. insperatus resembles E. caparaoensis + and E. manero +, which have a conical, short, blunt prolateral basal apophysis on male trochanter IV, and can be distinguished by: The presence of PAM; ocularium with similar-sized tubercles; median spine of scutal area III of medium size, not surpassing posterior margin of dorsal scutum; femur IV with blunt retrolateral subasal apophysis, 2 ventro-apical spines.

Redescription: Male (holotype): Dorsum ( Fig. 22A,B): Measurements: SL 5.30; SMW 4.60; femur I 2.25; II 4.25; III 3.70; IV 4.35. Median paracheliceral projection larger than PAM. Ocularium far from anterior scutal margin; with 17 tubercles. Carapace with 58 scattered tubercles. Scutal area I with 27–30 scattered tubercles on each side; II with 69; III with 67 and a median spine of medium size, pointing obliquely backwards, not surpassing posterior margin of dorsal scutum; IV with 28 tubercles. Posterior margin of dorsal scutum and free tergites I–III with a row of 19, 16, 13, 8 tubercles, respectively. Anal operculum with 30 tubercles.

Venter: Coxa I with 17–19 tubercles, median and distal ones largest; II with 30–37, distal ones largest; III with 31–39; IV irregularly tuberculate.

Chelicera: Segment I with 2 tubercles.

Pedipalpus: Trochanter dorsally inflated, with 3–4 tubercles. Femur dorsally smooth; ventrally with 1 large pointed basal tubercle, 2–3 small aligned ones. Tibial setation: Prolateral IiIi, retrolateral IiIii. Tarsal setation: Prolateral IIi, retrolateral IiIi.

Legs ( Fig. 22C–I): Coxa II with a retrolateral row of 3 tubercles; IV densely tuberculate, with 1 transversal prolateral apical apophysis, this conical, long, blunt, curved posteriad and ventrad. Trochanters I– IV with scattered tubercles; IV prolaterally with 1 basal apophysis, this conical, short, blunt, swollen in the middle; retrolaterally with 1 subasal and 1 large apical tubercle. Femora I–III with small PDS, RDS; I ventrally with 2 rows of slightly enlarged tubercles; III sinuous, ventrally with a prolateral row of tubercles increasing in size distally, with PVS larger than RVS; IV sinuous, with medium PDS, RDS; 1 small prolateral apical spine; 1 blunt retrolateral subasal apophysis; ventrally with 2 rows of tubercles, prolateral ones enlarged, increasing in size distally, with PVS larger than RVS. Tibia III with two ventral rows of pointed tubercles increasing in size subapically (4 large); IV with 1–2 small retrolateral spines; ventrally with 2 rows of pointed tubercles increasing in size distally, 2 apical spines. Tarsal segmentation:?, 9,?, 6.

Penis ( Fig. 44E,F): Stylus smooth, apex slightly swollen; with angular medio-ventral projection. Ventral process of glans curved; apex with flabelliform projection. Ventral plate with concave sides; with 2–3 pairs of straight distal setae; 4 pairs of straight basal setae, basalmost pair slightly smaller than other basal ones.

Coloration: Yellowish brown; brown on dorsal scutum edges. Dark brown on edges of legs and its apophyses.

Female (IBSP 4283): Dorsum: Measurements: SL 4.60; SMW 3.80; femur I 2.00; II 3.70; III 2.80; IV 3.70. Posterior margin of dorsal scutum and free tergites I–III with rows of 19 and 24, 19 and 21, 16 and 16, 15 and 15 tubercles, respectively. Pedipalpus: Tibial setation: Prolateral IiiIi/IiIi, retrolateral IiIi. Legs: Coxa IV densely and irregularly tuberculate, with 1 oblique prolateral apical apophysis, this conical, short. Trochanters I–II with 1 large ventro-basal tubercle; IV retrolaterally with 1 apical apophysis, this conical, short, blunt. Femur I with rows of similar-sized tubercles; II with reduced or small PDS, small RDS; III with small PDS, medium RDS; ventrally with rows of similar-sized tubercles, with 1 large prolateral apical tubercle; IV dorsal, prolateral and retrolateral rows only with similar-sized tubercles, ventrally with 2 rows of tubercles, 2 small apical spines. Tibia III only with rows of similar-sized tubercles; IV without retrolateral spines, ventrally with 2 rows of similar-sized tubercles, 2 large pointed apical tubercles. Metatarsus I with 2 ventro-apical setae. Tarsal segmentation: 6, 8–9, 6, 6.

Variation in males (n=3): Measurements: SL 4.65–5.30; SMW 4.00–4.60; femur I 2.20–2.25; II 4.10– 4.25; III 3.10–3.70; IV 4.10–4.35. Pedipalpus: Tibial setation: Prolateral IiIi/IiiIi, retrolateral IiIi/IiiIi/IiIii. Femur I with reduced or small RDS; IV with small or medium PDS. Tarsal segmentation: 6, 8–9, 6, 6.

Type locality: Brazil, São Paulo, Santo André, Alto da Serra .

Geographical distribution ( Fig. 50A): Brazil. Serra do Mar in São Paulo State.