Stygnoplus neblina , 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: 6-8

publication ID 10.5281/zenodo.281385

persistent identifier

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scientific name

Stygnoplus neblina

sp. nov.

Stygnoplus neblina  sp. nov.

( Figs. 3View FIGURE 3 A –E, 12 G –I)

Diagnosis: The male of this species differs from other Stygnoplus  by the combination of following characteristics: Absence of white patches on body; presence of retrolateral apical tubercle on femur IV (longer than segment width); absence of dorsal tubercles on anterior-median tibia IV; tibia IV with one retrolateral long and one ventroapical long tubercles.

Type locality: São Gabriel da Cachoeira (Pico da Neblina  , 860 m. a.s.l.).

Type material: All material collected in Brazil, Amazonas, São Gabriel da Cachoeira (Pico da Neblina  ). Holotype male, 860 m. a.s.l., 28.IX. 2007, A. Nogueira leg. (INPA-OP 1016); Paratypes: 860 m. a.s.l., 29.IX. 2007, N. Lo Man Hung leg., male (MZSP- 36566); female ( INPA OP 1017); 2,000 m.a.s.l., 6.X. 2007, N. Lo Man Hung. leg., female ( INPA OP 1018); 7.X. 2007, A. Nogueira leg., male ( INPA OP 1019); female ( INPA OP 1020); 2,400 Etymology: Noun in apposition, in reference to the type locality.

Male description (holotype): Measurements: DSL 4.3; PL 2.0; DSW 3.6; PW 3.3; ID 1.9; chelicera II 3.9; III 1.60; pedipalpus 9.4; leg I 11.6; II 26.1; III 17.9; IV 24. 1.

Dorsum ( Fig. 3View FIGURE 3 A –B): Anterior margin with four –five tubercles each side. Prosoma with with five tubercles scattered, with one tuberculate elevation next to anterior margin. Lateral margin with one row of tubercles from coxa II to area I. Area I with nine –ten tubercles each side; II with four –six each side; III with two divergent spines backwards, with tuberculate base, two tubercles each spine side; IV with one row of 10 tubercles. Posterior margin and free tergites with minute tubercles. Anal operculum with one anterior row of small tubercles, some scattered.

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

Chelicera: Segment I with six tubercles on bulla; II with one large basal tubercle, four small distal; III with one large basal followed by one small, one median, two small distal tubercles. Without interchelar space.

Pedipalpus: Coxa with one ventral large tubercle, three dorsal tubercles on base. Trochanter with two ventral, two dorsal tubercles. Femur with four small ventral tubercles. Patella swollen at distal third. Tibia ( Fig. 3View FIGURE 3 C): ectal IIiIi, mesal IIiIi, with 10 ventral tubercles. Tarsus ( Fig. 3View FIGURE 3 C): ectal iiiIiiiIii, mesal IiIiIi, with 15 ventral setiferous tubercles.

Legs: Coxa I with two tubercles; II with one anterior, one posterior; III with one anterior fused with one of coxa II, one posterior fused with one of coxa IV; IV with two tubercles close to dorsal scutum margin, some on lateral side, one dorsoapical small spine. Trochanter I with two ventral tubercles; II with three ventral, two retrolateral, four dorsal; III with six ventral, one prolateral, four retrolateral, five dorsal; IV with 13 dorsal tubercles, one prolateral large and one retrolateral apical large, 13 ventral. Femora I –II with small tubercles; III with two ventral rows of tubercles (anterior larger), two large dorsoposterior tubercles; IV ( Fig. 3View FIGURE 3 D –E) with two ventral rows of tubercles increasing in size at subapical fifth; one retrolateral, one prolateral, one dorsal row of small tubercles, two large dorsodistal spines. Patella IV ( Fig. 3View FIGURE 3 D –E) with one dorsoapical large tubercle, one ventroapical large tubercle, minute tubercles scattered. Tibia IV ( Fig. 3View FIGURE 3 D –E) with one retrolateral apical large and two ventroapical large tubercles. Claws with five teeth. Tarsal segmentation: 6, 12, 6, 7, basal segment of tarsus I swollen.

Penis ( Fig. 12View FIGURE 12 G –I): Ventral plate thin, with long base, U-cleft on distal margin, two dorsal setae, one ventral setae each side. Glans long, with two pairs of setae on base; stylus with ventroapical projection. Truncus with three pairs of lateral setae.

Color: Dark-brown, reticulate on central prosoma and dorsal femur apex. Patellae and tibiae darker. Border of grooves and lateral margins black. Chelicerae black reticulated. Pedipalpus yellowish with some small black patches. Posterior margin and free tergites yellow with some black patches.

Female description (MZSP- 36565): Measurements: DSL 4.9; PL 1.9; DSW 3.9; PW 2.9; ID 1.8; chelicera II 2.9; III 1.8; pedipalpus 9.6; leg I 16; II 21; III 16; IV 18.

Anterior margin with three tubercles each side. Prosoma with one high spine upwards, without tubercles. Area I with one tubercle on each half; II with two tubercles; IV with two tubercles. Posterior margin and free tergites I –III with very much scattered tubercles. Coxa IV with one or two dorsoapical spines. Trocanther IV with one dorsal high tubercles (longer than segment width), with one retrolateral apical tubercle. Femur IV with few scattered on retrolateral and ventral sides. Patela-tibia IV with small tubercles. Tarsal segmentation: 6, 16, 7, 8.

Distribution: Recorded only from the type locality, from 860 to 2,400 m.a.s.l.


Instituto Nacional de Pesquisas da Amazonia