Stygnoplus tapirapeco, Pinto-Da-Rocha, Ricardo & Tourinho, Ana Lúcia, 2012

Pinto-Da-Rocha, Ricardo & Tourinho, Ana Lúcia, 2012, Two new genera, ten new species and new records of Amazonian Stygnidae Simon, 1879 (Opiliones: Laniatores), Zootaxa 3340, pp. 1-28 : 8-10

Stygnoplus tapirapeco sp. nov.

( Figs. 4 A–E, 13A–C)

Diagnosis: The male of this species is similar to those of Stygnoplus forcipatus ( C.L. Koch, 1845) , S. biguttatus Pinto-da-Rocha, 1997, S. dominicanus ( Roewer, 1943) , S. flavitarsis ( Simon, 1879) , S. granulosus Mello-Leitão, 1940 , S. lomion Villarreal, 2006 and S. triacanthus (Kollar, 1839) based on the presence of two large apical tubercles on male patella IV and ventroapical rows of tubercles on femur and tibia IV. It differs from them in the absence of dorsal strong tubercles on femur-tibia and venter of male tibia IV.

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

Type material: All material collected in Brazil, Amazonas, Barcelos ( Tapirapecó mountain), by A.A. Nogueira & R. Braga Neto. Holotype, 14.X. 2007, 700 m. a.s.l., male (INPA-OP 0954). Paratypes: same data as holotype, female ( INPA); 14.X. 2006, 700 m. a.s.l., female ( INPA); 6.X. 2006, 700 m. a.s.l., 2 females (INPA-OP 958); 10.X. 2006, 750 m. a.s.l., 2 males (INPA-OP 953); 13.X. 2006, 800 m. a.s.l., female (INPA-OP 955); 13.X. 2006, 800 m. a.s.l., 2 females (INPA-OP 963); 13.X.2006, 1,200 m.a.s.l., 2 males, 3 females (MZSP-36553); 14.X. 2006, 700 m. a.s.l., male (INPA-OP 954); 14.X. 2006, 700m, female ( MNRJ); 14.X.2006, 1,200 m.a.s.l., female (MPEG-OPI 02505); 16.X.2006, 1,200 m.a.s.l., female (MPEG-OPI 02506); 16.X.2006, 1,200 m.a.s.l., male, female (INPA-OP 961); 16.X.2006, 1200 m.a.s.l., male ( MNRJ 19362); 14.X. 2006, 700 m. a.s.l., female ( MNRJ 19363); 16.X.2006, 1,200 m.a.s.l., male and female (MZSP-36554); 16.X.2006, 1,200 m.a.s.l., female (MZSP-365555); idem, 1,200 m.a.s.l., female (INPA-OP 964); 17.X.2006, 1,200 m.a.s.l., female (MZSP-36552); idem, 1,200 m.a.s.l., female (INPA-OP 959); idem, 1,200 m.a.s.l., male, 2 females (INPA-OP 966); idem, 1,200 m.a.s.l., 2 males, 3 females (INPA-OP 957); idem 1,200 m.a.s.l., 4 males, female (MZSP-36541); Barcelos (Pedra Comprida, rio Mariri), female (INPA-OP 956).

Etymology: A noun in apposition, in reference to the type locality.

Male description (holotype): Measurements: DSL 3.6; PL 2.0; DSW 3.0; PW 2.9; ID 1.9; chelicera II 3.9; III 2.0; pedipalpus 7.6; leg I 10.5; II 22; III 15; IV 18.

Dorsum ( Fig. 4 A–B): Anterior margin with four–six tubercles each side. Prosoma with one large spine slightly frontwards, with tuberculate base. Lateral margin with one row of tubercles from coxa II to posterior margin. Area I with three tubercles each side; II with two–four tubercles each side; III with two divergent spines backwards, with tuberculate base, one tubercle behind each spine. Posterior margin with a row of 11 minute tubercles. Free tergite I with 12 minute tubercles; II with 13; III with 12. Anal operculum with one anterior row of small tubercles, some scattered.

Venter: Coxa I with six large tubercles; II with one median row of large tubercles, one anterior row of 10 small tubercles, one posterior row of seven small tubercles; III with one median row of seven small tubercles, four anterior, 10 posterior; IV irregularly tuberculate. Posterior margin with one row of small tubercles, some scattered. Anal operculum with small scattered tubercles.

Chelicera: Segment I with six–seven tubercles on bulla; II with one large basal tubercle, three small distal; III two large basal, two small distal. Without interchelar space.

Pedipalpus: Coxa with six ventral tubercles (apical larger), four dorsal tubercles (two large). Trochanter three ventral tubercle (one large); one dorsal. Femur with five small ventral tubercles, slightly swollen at distal fifth. Patella swollen at distal third. Tibia ( Fig. 4 C): ectal IIiIi, mesal IIiIi, with eight ventral tubercles. Tarsus ( Fig. 4 C): ectal iIiIii, mesal IiIiIi, with nine ventral tubercles.

Legs: Coxa I with two tubercles; II with one anterior, one posterior bifid; III with one anterior fused with one of coxa II; IV with four large tubercles close to dorsal scutum margin, one dorsoapical small spine. Trochanter I with three ventral tubercles; II with five ventral, two prolateral, one dorsal large; III with six ventral, one retrolateral apical larger, one dorsal large; IV with one dorsoapical spine (large), one prolateral tubercle and one retrolateral spine, several small tubercle scattered on dorsal and ventral sides. Femora I–II with small tubercles; III with two ventral rows of tubercles increasing in size on distal half, one large dorsoposterior tubercle; IV ( Fig. 4 D–E) with two ventral rows of tubercles increasing in size at apical third; one retrolateral, one prolateral, two dorsal rows of small tubercles, two large dorsodistal spines. Patella IV ( Fig. 4 D–E) with two dorsodistal strong spines (external larger), one prolatero-apical tubercle, with scattered tubercles. Tibia IV ( Fig. 4 D–E) with one dorsal row of tubercles, one retrolateral row of small tubercles, one prolateral row of small tubercles, two ventral rows of tubercles (internal larger), one retrolateral large tubercle on apex. Claws with five–six teeth. Tarsal segmentation: 7, 15, 6, 7.

Penis ( Fig. 13 A–C): Ventral plate thin, with long base, slightly concave on distal margin and convex on lateral sides, two dorsal setae, one ventral setae each side. Glans long, with three pairs of setae on base; stylus slightly swollen subdistally. Truncus with five pairs of lateral setae.

Color: Dark-brown, reticulate on prosoma, dorsal femur apex, patella and tibia IV. Border of grooves black. Pedipalpus yellowish with some small black patches. Posterior margin and free tergites yellow with some green patches.

Female description (INPA OP-955): Measurements: DSL 4.0; PL 1.7; DSW 3.3; PW 2.8; ID 1.7; chelicera II 2.0; III 1.0; pedipalpus 8.2; leg I 1.1; II 2.5; III 1.5; IV 20. 5.

Area I–II with two tubercles each side. Posterior margin with 11 minute tubercles. Free tergite I with 14 minute tubercles; II with 13; III with nine. Pedipalpus: Tibia: ectal IIiIi, mesal IIiIi, with four ventral tubercles. Tarsus: ectal iIiiIii/iIiIii, mesal IiIiIiii/IiIiIiIi, with five ventral tubercles. Femur IV with four apical tubercles on ventral internal row, external row of small tubercles. Patella IV with two dorsal apical tubercles half size of male ones. Tibia IV with small tubercles. Claws with six teeth. Tarsal segmentation: 7, 17, 6, 7.

Distribution: Recorded only from the type locality, from 700 up to 1,200 m.a.s.l.

Figures

FIGURE 4. Stygnoplus tapirapeco sp. nov. A, habitus, dorsal view; B, lateral view; C, left pedipalpal tibia and tarsus; D – E, trochanter-tibia of the right leg IV, D, ventral view; E, dorsal view. Scale bars: 2 mm.

FIGURE 13. Penis (dorsal, lateral, ventral views, respectively) of some new species of Stygnidae: A – C, Stygnoplus tapirapeco sp. nov.; D – F, Auranus hehu sp. nov.; G – I, Jime chifrudo sp. nov.. Scale bars: 0. 1 mm.