Eusarcus dubius 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 : 54-56

Eusarcus dubius B. Soares

( Figs. 13, 47C,D, 49B)

Eusarcus dubius B. Soares 1943b: 206 (cit), 209, fig. 4; 1945b: 193 (cit); Soares & Soares 1954b: 260 (cat); Pinto-da- Rocha & Caron 1989: 1024 (cat); Kury 2003a: 169 (cat). (ma holotype, “Paranaí [Adrianópolis], Paraná; J. Leprevost & R.B. Lange leg.; vii.1942; MHNC 183”; possibly lost).

Neopucrolia dubia: Mello-Leitão 1945: 156 (cat).

Material examined: BRAZIL. São Paulo: Avaré, V.C. de Jesus leg., 31.viii.1965, 1 ma & 3 fe ( HEMS 327 ) ; Botucatu, V.C. Jesus leg., 9.v.1967, 1 ma & 2 fe ( MNRJ 16171 ) ; idem ( Estação Ecológica Botucatu ), V.C. de Jesus leg., 19.ix.1966, 5 ma & 7 fe ( MNRJ 17644 ) ; idem (next to Fazenda Lageado), V.C. de Jesus leg., i.1966, 5 ma & 1 fe ( HEMS 326 ) ; idem (Fazenda Morro Vermelho), V.C. de Jesus leg., 2 ma & 1 fe ( HEMS 1012 ) ; idem (Rubião Jr.), A. Kury leg., 5.v.1988, 1 fe ( MNRJ 6230 ) ; idem, M. Menezes leg., 17.ix.1970, 4 ma ( MNRJ 16161 ) ; idem, M.J.B. Vianna leg., 11.v.1970, 1 ma & 1 fe ( MNRJ 16162 ) ; idem, A. Mantovan & V.C. de Jesus leg., 16.v.1965, 3 ma & 6 fe & 3 im ( MNRJ 16169 ) ; idem, A. Mantovan leg., 8.iv.1965, 1 fe ( MNRJ 16179 ) ; São Manuel (Pratânia), R. Pinto-da-Rocha & M.M.A. de Oliveira leg., 1 beta male & 1 fe ( MHNC 6621 ) ; idem (Km 278 Rod. Mal. Rondon), R. Pinto-da-Rocha & M.M. Argel de Oliveira leg., 1.i.1990, 1 ma ( MHNC 6704 ) . Paraná: (“ Vale do Ribeira ”), without name of collector, iv.1942, 1 ma ( HEMS 965 ) . Without locality data: 1 ma & 1 fe ( MNRJ 16165 ) .

Diagnosis: E. dubius resembles E. caparaoensis + and E. manero +, which have a conical, short, blunt prolateral basal apophysis on the male trochanter IV, and can be distinguished by: The presence of PAM; ocularium high, with 2 spines; median spine of scutal area III short; row of high, pointed tubercles on femur IV composed of proventral (in distal half) and retrolateral rows, 2 ventral apical spines.

Redescription: Male (HEMS 965): Dorsum ( Fig. 13A,B): Measurements: SL 2.80; SMW 2.70; femur I 1.40; III 1.85; IV 2.30. Median paracheliceral projection of similar-size as PAM. Ocularium next to anterior scutal margin; high, with 2 spines, 17 tubercles. Carapace with 20 scattered tubercles. Scutal area I with 4–7 scattered tubercles on each side, a row of 6–8 next to groove II; II with 47 tubercles; III with 44 (median spine broken); IV with 32 tubercles. Posterior margin of dorsal scutum with 3 scattered tubercles, a row of 15 tubercles. Free tergite I with a row of 20 tubercles; II with 6 scattered, a row of 19; III with 6 scattered, a row of 12 tubercles. Anal operculum with 32 tubercles.

Venter: Coxa I with 18–19 tubercles, median and distal ones largest; II with 22–30, distal ones largest; III– IV irregularly tuberculate.

Chelicera: Segment I with 2 tubercles.

Pedipalpus: Trochanter dorsally inflated, with 3 tubercles; ventrally with 1 large tubercle, 1 prolateral and 2 retrolateral small ones. Femur dorsally with 4–5 large tubercles and 4 small apical scattered ones; ventrally with 1 large basal tubercle, 3–4 small ones. Tibia and tarsus lost.

Legs ( Fig. 13C–I): Coxa II with 3 tubercles on retrolateral margin; IV densely tuberculate, with 1 almost transversal prolateral apical apophysis, this conical, long, blunt, curved posteriad and ventrad, swollen in the middle on retroventral face (only on right side). Trochanters I–IV with scattered tubercles; I with large retrolateral tubercles, 1 large ventro-basal tubercle; II (lost); IV prolaterally with 1 basal apophysis, this conical, short, blunt, swollen in the middle; retrolaterally with 1 large dorso-apical tubercle and another ventral one. Femur I with small PDS, RDS; ventrally with 2 rows of tubercles, one of them with slightly enlarged tubercles (prolateral on right and retrolateral on left femur); II (lost); III sinuous, with reduced PDS, medium RDS; ventrally with 2 rows of tubercles increasing in size distally, prolateral ones enlarged (3 large); IV sinuous, with a prolateral row of tubercles increasing in size in basal third, a retrolateral row of high, pointed tubercles, with medium PDS, RDS; ventrally with 2 rows of tubercles, prolateral ones increasing in size in distal half, becoming high, pointed (7–9 large), 2 apical spines, prolateral one larger than retrolateral. Tibia III ventrally with 2 rows of tubercles increasing in size subapically (4 large), prolateral ones slightly small; IV ventrally with 2 rows of tubercles increasing in size distally (3–4 large), retrolateral ones enlarged, 1 retrolateral apical spine. Tarsal segmentation: 5,?, 6,?.

Penis ( Fig. 47C,D): 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 3 pairs of curved distal setae; 1 pair of short, straight median seta; 3–4 pairs of straight basal setae.

Coloration: Yellowish brown. Body edges, legs and apophyses brownish. Light brown on distal parts of metatarsi and all tarsi.

Female (MNRJ 16171): Dorsum: Measurements: SL 3.00; SMW 2.60; femur I 1.20; II 2.00; III 1.60; IV 2.10. Posterior margin of dorsal scutum and free tergites I–III with rows of 16 and 23, 12 and 28, 17 and 22, 16 and 22 tubercles, respectively. Pedipalpus: Tibial setation: Prolateral and retrolateral IiIi. Tarsal setation: Prolateral IIi, retrolateral IiIi. Legs: Coxa IV densely tuberculate, with 1 oblique prolateral apical apophysis, this conical, short, pointed. Trochanter IV only with scattered tubercles. Femur I ventrally with 2 rows of slightly enlarged tubercles; III with small PDS, medium RDS, ventrally with 2 rows of tubercles, prolateral ones slightly enlarged; IV with prolateral and retrolateral rows of similar-sized tubercles; ventrally with 2 rows of tubercles, prolateral tubercles increasing in size distally, 1 large prolateral tubercle. Tibiae III–IV with rows of similar-sized tubercles. Tarsal segmentation: 5, 7, 6, 6.

Variation in males (n=6): Measurements: SL 2.60–3.00; SMW 2.50–2.85; femur I 1.20–1.40; II 2.05– 2.20; III 1.55–1.85; IV 2.00–2.30. Median spine of scutal area III short, not surpassing groove IV. Pedipalpus: Tibial setation: Prolateral IiIi/iIiIi, retrolateral IiIi/iiIi. Tarsal setation: Prolateral IIi, retrolateral IiIi/iIi. Trochanter II with scattered tubercles. Femur I with reduced or small RDS; II with reduced or small PDS, reduced to medium RDS; III with reduced or small PDS. Tibia IV ditally normal or thickened. Tarsal segmentation: 5, 7, 6, 6.

Variation in females (n=6): Measurements: SL 2.75–3.00; SMW 2.40–2.60; femur I 1.10–1.20; II 1.80– 2.00; III 1.40–1.60; IV 1.90–2.10. Femur I with reduced or small PDS, RDS; III with reduced or small PDS.

Type locality: Brazil, Paraná, Adrianópolis .

Geographical distribution ( Fig. 49B): Brazil. Interior of São Paulo and Paraná States .