Stygnus kuryi Pinto-Da-Rocha & Tourinho, 2012, sp. nov.

Stygnus kuryi sp. nov.

(Figs. 8 A–E, 15A–C)

Diagnosis: Similar to S. aggerum Soerensen, 1932, S. mediocris (Roewer, 1931), S. simplex (Roewer, 1913) and S. weyrauchi (Roewer, 1963) with respect to free tergites with a pair of long tubercles, large, cylindrical and straight femur and tibia IV, femur IV short and with retrolateral row of strong tubercles. The males and females distinguished from all other Stygnus species by the presence of a few tubercles on areas I–III (two–three on each side of area).

Type locality: Brazil, Amazonas, Barcelos (Tapirapecó mountain)

Type material: BRAZIL: Amazonas, Barcelos (Tapirapecó mountain), A.A. Nogueira & R. Braga Neto leg. Holotype, 28.IX. 2006, 180 m. a.s.l., male (INPA-OP 982). Paratypes: same data as holotype; 28.IX. 2006, 130 m. a.s.l., male (INPA-OP 970); 28.IX. 2006, 130 m. a.s.l., female (INPA-OP 979); 29.IX. 2006, 180 m. a.s.l., 2 males, 6 females (INPA-OP 972); 29.IX. 2006, 180 m. a.s.l., 2 females (INPA-OP 980); 29.IX. 2006, 180 m. a.s.l., 2 males, 2 females (INPA-OP 973); 30.IX. 2006, 180 m. a.s.l., 2 female (INPA-OP 971); 30.IX. 2006, 180 m. a.s.l., female (MZSP-36558); 2.X.2006, 2 males, 6 females (MZSP-36544); 2.X. 2006, 450 m. a.s.l., male, female (MZSP- 36556); 2.X. 2006, 450 m. a.s.l., 3 females (INPA-OP 968); 3.X. 2006, 450 m. a.s.l., 2 females (INPA-OP 974); 3.X. 2006, 450 m. a.s.l., male, 2 females (MZSP-36557); 3.X. 2006, 450 m. a.s.l., female (MPEG-OP 02501); 4.X. 2006, 450 m. a.s.l., 2 males, 6 females (MZSP-36559); 4.X.2006, 2 females (INPA-OP 976); 6.X. 2006, 800 m. a.s.l., 2 females (INPA-OP 977); 6.X. 2006, 800m, female (INPA-OP 978); 14.X. 2006, 700 m. a.s.l., 3 females (INPA-OP 975); 14.X. 2006, 800 m. a.s.l., female (MNRJ 19359); 21.X. 2006, 450 m. a.s.l., female (MZSP-36560). Paratypes from São Gabriel da Cachoeira (Pico da Neblina): 100 m. a.s.l., 22.IX.2007, A. Nogueira leg., male, 3 females (INPA-OP 1041); 100 m. a.s.l., 22.IX.2007, A. Nogueira leg., 2 males, female (MZSP-36528); 100 m. a.s.l., 22.IX.2007, D. Candiani leg., males, 3 females (MZSP-36569); 100 m. a.s.l., 22.IX.2007, A. Nogueira leg., 3 females (INPA-OP 1042); 100 m. a.s.l., 22.IX.2007, N. Lo Man Hung leg. 8 females (INPA-OP 1043); 100 m. a.s.l., 22.IX.2007, N. Lo Man Hung leg. female (INPA-OP 1044); 100 m. a.s.l., 23.IX.2007, A. Nogueira leg., male, female (MZSP-36527); 100 m. a.s.l., 23.IX.2007, A. Nogueira leg., 2 females (INPA-OP 1045); 100 m. a.s.l., 23.IX.2007, A. Nogueira leg., 2 females (INPA-OP 1046); 100 m. a.s.l., 23.IX.2007, N. Lo Man Hung leg., 2 males, 4 females (MZSP-36522); 100 m. a.s.l., 23.IX.2007, D. Candiani leg., 2 females (INPA-OP 1047); 100 m. a.s.l., 23.IX.2007, D. Candiani leg., male (INPA-OP 1048); 100 m. a.s.l., 24.IX.2007, A. Nogueira leg., male, 6 females (MZSP-36570); 100 m. a.s.l., 24.IX.2007, N. Lo Man Hung leg. 2 females (INPA-OP 1049); 100 m. a.s.l., 24.IX.2007, N. Lo Man Hung leg. female (INPA-OP 1050); 100 m. a.s.l., 24.IX.2007, A. Nogueira leg., 3 females (INPA-OP 1051); 100 m. a.s.l., 24.IX.2007, D. Candiani leg., female (INPA-OP 1052); 100 m. a.s.l., 24.IX.2007, D. Candiani leg., 2 females (INPA-OP 1053); 100 m. a.s.l., 24.IX.2007, D. Candiani leg., female (INPA-OP 1054); 100 m. a.s.l., 28.IX.2007, N. Lo Man Hung leg., 2 females (INPA-OP 1055); 400 m. a.s.l., 25.IX.2007, N. Lo Man Hung leg., female (INPA-OP 1056); 400 m. a.s.l., 25.IX.2007, D. Candiani leg., female (INPA-OP 1047); 400 m. a.s.l., 25.IX.2007, A. Nogueira leg., male, 2 females (INPA-OP 1058); 400 m. a.s.l., 25.IX.2007, A. Nogueira leg., female (INPA-OP 1059); 400 m. a.s.l., 25.IX.2007, A. Nogueira leg., 2 males, 2 females (MZSP-36533); 400 m. a.s.l., 26.IX.2007, N. Lo Man Hung leg., 2 females, juvenile (INPA-OP 1060); 400 m. a.s.l., 26.IX.2007, D. Candiani leg., female (INPA-OP 1061); 400 m. a.s.l., 26.IX.2007, D. Candiani leg., 2 females (INPA-OP 1062); 400 m. a.s.l., 26.IX.2007, A. Nogueira leg., 2 males, female (INPA-OP 1063); 400 m. a.s.l., 26.IX.2007, N. Lo Man Hung leg., 2 females (INPA-OP 1064); 400 m. a.s.l., 26.IX.2007, N. Lo Man Hung leg., male (INPA-OP 1065); 400 m. a.s.l., 26.IX.2007, N. Lo Man Hung leg., male, 2 females (MZSP-36573); 400 m. a.s.l., 27.IX.2007, D. Candiani leg., 2 males, female (INPA-OP 1066); 400 m. a.s.l., 27.IX.2007, A. Nogueira leg., male, 3 females (INPA-OP 1067); 860 m. a.s.l., 28.IX.2007, N. Lo Man Hung leg., male, 2 females (MZSP-36536); 860 m. a.s.l., 28.IX.2007, N. Lo Man Hung leg., male (MZSP-36538); 860 m. a.s.l., 29.IX.2007, A. Nogueira leg., 2 females (INPA-OP 1068); 860 m. a.s.l., 29.IX.2007, N. Lo Man Hung leg., female (INPA-OP 1069); 860 m. a.s.l., 29.IX.2007, N. Lo Man Hung leg., female (INPA-OP 1070); 860 m. a.s.l., 29.IX.2007, D. Candiani leg., male, female (MZSP-36537); 860 m. a.s.l., 29.IX.2007, D. Candiani leg., 2 females (INPA-OP 1071); 860 m. a.s.l., 30.IX.2007, D. Candiani leg., female (INPA-OP 1072); 860 m. a.s.l., 30.IX.2007, N. Lo Man Hung leg., female (INPA-OP 1073); 860 m. a.s.l., 30.IX.2007, A. Nogueira leg., female (INPA-OP 1074); 860 m. a.s.l., 30.IX.2007, A. Nogueira leg., female (INPA- OP 1075). Paratypes: Pico do Tapirapecó, Rio Padauari, 450 m. a.s.l., A. Nogueira leg. IX. 2006, 800 m. a.s.l., male, male (MNRJ 19360); Rio Marari, Terra indígena Yanomammi, 450 m. a.s.l., 27.I.2006, male (MPEG-OPI 02502); Barcelos (Comunidade Acuquaea, rio Padauari, 450 m. a.s.l.), 23.IX.2006, female (INPA-OP 1076); the same, 2 females (INPA-OP 1077); (Rio Mariri, Terra Yanomami), 27.IX.2006, female (INPA-OP 1078).

Etymology: In honor of the arachnologist Adriano Brilhante Kury (MNRJ), for his significant contributions to the study of Opiliones.

Male description (holotype): Measurements: DSL 4.4; PL 1.7; DSW 3.7; PW 3.4; ID 1.7; chelicera II 3.6; III 1.6; pedipalpus 8.2; leg I 13; II 24; III 17.5; IV 22.

Dorsum (Fig 8 A–B): Anterior margin with two large tubercles. Prosoma with one large spine slightly frontwards, with two tubercles close to each corner. Lateral margin with one row of small tubercles from coxa II to posterior margin. Area I with two tubercles each side (larger close to median groove); II with three tubercle; III with two divergent and very large spines backwards, base tuberculate with one large tubercle on back side, two tubercles each side of the area. Posterior margin with a row of 15 small tubercles. Free tergite I with 16 tubercles; II with three–six tubercles each side, one pair of spines, two tubercles between them; III with two spines, three tubercles between them, three on each corner. Anal operculum with five anterior tubercles, seven on posterior border.

Venter: Coxa I with one median row of four large tubercles, three–four anterior, two apical; II with one median row of seven large tubercles, two anterior, seven posterior small, two apical; III with two apical tubercles, with some scattered small tubercles; IV with scattered small tubercles. Posterior margin with one row of minute tubercles. Anal operculum with one row of seven median tubercles, 11 on posterior margin.

Chelicera: Segment I with four–five tubercles on bulla; II with one basal large tubercle, one median wide, four small distal tubercles; III with one median large, four small distal tubercles. With interchelar space.

Pedipalpus: Coxa with two ventral tubercles, one large dorsal tubercle, four dorsal tubercles (two large). Trochanter with three ventral tubercles (one large); one dorsal. Femur with five small ventral tubercles, slightly swollen at distal fifth. Patella swollen at distal third. Tibia (Fig. 8 C): ectal iIiIi, mesal IIiIi, five ventral tubercles, with small tubercles scattered dorsally. Tarsus (Fig. 8 C): ectal Iiii, mesal IiIii, with two ventral rows of small setae.

Legs: Coxa I with two tubercles, posterior direct to coxa II; II with one anterior, one posterior bifid; III with one anterior fused with that of coxa II; IV with one long and sharp apical tubercle and three small lateral. Trochanter I with two ventral tubercles; II with seven ventral, one prolateral, one retrolateral, one dorsal; III with five ventral tubercles, one prolateral, one dorsal; IV with two apical tubercles (one larger), one retrolateroapical, 12 ventral. Femur II–III with small tubercles; II–III with two dorsoapical tubercles; III with three ventroapical tubercles; IV (Fig. 8 D–E) with two ventral rows of tubercles increasing in size at distal third (internal larger); one retrolateral, row in all extension, one prolateral of small tubercles, two dorsal rows of small tubercles, two dorsoapical tubercles. Patella IV (Fig. 8 D–E) tuberculate, apical tubercle larger. Tibia IV (Fig. 8 D–E) with small tubercles, two dorsal rows of small tubercles, with two ventral rows increasing at distal third. Tarsal segmentation: 7, 10/11, 6, 7. Basitarsi I not inflated.

Penis (Fig. 15 A–C): Ventral plate with convergent sides, distal margin straight, with three dorsal pairs of long setae, three pairs of intermediary small setae, three pairs on basal portion. Stylus long and slightly swollen distad, dorsal process shorter than stylus,

Color: Dark-brown, posterior margin and free tergites darker. Black reticulate on prosoma and patella IV. Leg I and pedipalp yellowish.

Female description (INPA-OP 979): Measurements: DSL 3.8; PL 1.6; DSW 3.4; PW 2.6; ID 1.5; chelicera II 1.9; III 1.1; pedipalpus 6.9; leg I 10.3; II 22.5 III 15.7; IV 20. 7.

Anterior margin with two–three small tubercles each side. Prosomal spine smaller than male. Lateral margin with tubercles from retrolateral coxa II to posterior margin. Area I with two–three tubercles each side; II with two–three tubercles each side: III with one tubercle on each spine side. Posterior margin with 10 minute tubercles. Free tergite I with 15 minute tubercles; II with 12 minute tubercles and two large; III with 14 small tubercles and two large. Chelicera segment I with three tubercles on bulla; II with five small tubercles; III with four small tubercles. Pedipalpus: Coxa with one ventral tubercle, trochanter with two ventral; tibia ectal IIiIi, mesal IIiIi; tarsus: ectal Iiii, mesal IiIii. Femur IV with two ventral row of small tubercles. Patella IV with two dorsal apical tubercles smaller than male. Tibia IV with small tubercles. Tarsal segmentation: 7, 12, 6, 7.

Distribution: Recorded in northern Amazonas, upper Negro River, from 100 to 860 m.a.s.l. (Neblina) and 180 up to 860 m. a.s.l. (Tapirapecó).