Auranus tepui , 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: 12-14

publication ID

http://doi.org/ 10.5281/zenodo.281385

persistent identifier

http://treatment.plazi.org/id/038C87C8-2906-E444-AAF6-F952E8EDFC3A

treatment provided by

Plazi

scientific name

Auranus tepui
status

sp. nov.

Auranus tepui  sp. nov.

( Figs. 6View FIGURE 6 A –F, 14 A –C)

Diagnosis: Similar to Auranus parvus Mello-Leitão, 1941  and A. hehu  sp. nov. by size of tubercles on dorsal scutum and free tergites, by presence of several tubercles on prosoma and two tubercles on areas I and II. It differs from both by presence of only one tubercle on area III and posterior margin smooth. The male femur IV has larger tubercles on retrolateral and ventral faces than any other species of the genus.

Type locality: Brazil, Amazonas, São Gabriel da Cachoeira, Pico da Neblina  .

Type material: Brazil, Amazonas, São Gabriel da Cachoeira (Pico da Neblina  ), 400 m. a.s.l., 13.X. 2007, D.

Candiani leg., Holotype male (INPA-OP 1032); Paratypes: same locality as holotype, 100 m. a.s.l., 24.IX. 2007, N. Lo Man Hung leg., female (INPA-OP 1030); 400 m. a.s.l., 25.IX. 2007, D. Candiani leg., male, female (MZSP- 36567); 400 m. a.s.l., 26.IX. 2007, A. Nogueira leg., 2 males (INPA-OP 1031); 400 m. a.s.l., 27.IX. 2007, N. Lo Man Hung leg., male (INPA-OP 1033); 400 m. a.s.l., 27.IX. 2007, D. Candiani leg., male (MZSP- 36568); 400 m. a.s.l., 27.IX. 2007, A. Nogueira leg., female (INPA-OP 1034); 400 m. a.s.l., IX. 2007, A. Nogueira, D. Candiani & N. Lo Man Hung leg., female (INPA-OP 1035).

Etymology: A noun in apposition, in reference to the type locality. Tepui  is a table-top mountain or mesa found in the Guiana Highlands of South America. The word tepui  means "house of the gods" in the native tongue of the Pemon, the indigenous people who inhabit the Gran Sabana of Venezuela.

Male description (holotype): Measurements: DSL 2.6; PL 1.1; DSW 2.0; PW 1.9; ID 1.4; chelicera II 2.4; III 1.1; pedipalpus 5.9; leg I 8.9; II 14.8; III 10.7; IV 14. 2.

Dorsum ( Fig. 6View FIGURE 6 A –B): Anterior margin smooth. Prosoma with 14 central tubercles. Lateral margin with one row of tubercles from coxa II to area III. Areas I –II with two tubercles each side; III with two parallel and very large spines with apex twisted posteriorly, one tubercle behind each spine. Posterior margin smooth. Free tergites I –III with five tubercles each. Anal operculum with two central tubercles, five small tubercles on posterior border.

Venter: Coxa I with one median row of five large tubercles, three anterior, four posterior, three apical; II with one median row of six tubercles, three posterior, three apical; III with one row of five tubercles, three anterior, four posterior, four apical; IV with tubercles scattered. Posterior margin with one row of small tubercles each side. Anal operculum with one row of minute tubercles on posterior margin, six tubercles scattered.

Chelicera: Segment I with four tubercles on bulla; II with four tubercles; III with one basal large tubercle, three large median-distal. With interchelar space.

Pedipalpus: Coxa with one large dorso-basal tubercle, one large ventral tubercle. Trochanter with two ventral tubercles, smooth dorsally. Femur smooth ventrally, slightly swollen at distal third. Patella swollen at distal third. Tibia ( Fig. 6View FIGURE 6 C –D): ectal-mesal IIiIi, two ventral tubercles. Tarsus ( Fig. 6View FIGURE 6 C –D): ectal IiIi, mesal IiIiIi.

Legs: Coxa I with two tubercles; II with one anterior, one posterior; III with one anterior fused with one of coxa II; IV with eight tubercle (one large apical). Trochanter I with three ventral tubercles, three dorsal, one prolateral, one retrolateral; II with four ventral, one retrolateral, two dorsal; III with four ventral tubercles, two retrolateral, two prolateral, two dorsal; IV with four dorsal tubercles (one central and apical), two retrolateral, five ventral. Femora I –III with small tubercles; IV ( Fig. 6View FIGURE 6 E –F) with two rows of ventral tubercles increasing in size apically, one retrolateral row of tubercles. Patella IV ( Fig. 6View FIGURE 6 E –F) tuberculate (two dorsoapical larger). Tibia IV ( Fig. 6View FIGURE 6 E –F) with two ventral rows of large tubercles equal-sized in all extension. Tarsal segmentation: 7, 14, 6, 7.

Penis ( Fig. 14View FIGURE 14 A –C): Truncus swollen apically, with huge dorsal projection. Ventral plate wide (thinner on lateral margins), distal margin forming a calyx (ventrally straight, dorsally apex projected and bifid) with four distal pairs of cylindrical short setae, five pairs of cylindrical long setae, one intermediate pair of setae (size similar basal of distal group).

Female description (INPA-OP 1030): Measurements: DSL 3,0; PL 1.1; DSW 2.1; PW 1.8; ID 1.2; chelicera II 1.2; III 0.7; pedipalpus 6.1; leg I 7.9; II 16.5; III 12.2; IV 16. 1.

Prosoma with two central tubercles. Area III with two tubercles on external side of each spine. Area IV with six tuberlces. Posterior margin with nine tubercles. Free tergite I with 12 tubercles, one enlarged on each corner; II with 12; III with 10 tubercles. Anal operculum with one row of four median tubercles, six small tubercles on posterior border. Cheliceral segment I with one retrolateral tubercle on bulla; II with four tubercles; III with five tubercles. Pedipalpal tarsus: ectal IiIii, mesal IiIIi. Legs: trochanter I with three ventral tubercles; II with five ventral, one prolateral; III with five ventral, one retrolateral, two prolateral, smooth dorsally; IV with three dorsoapical tubercles (one central larger), three small, one prolateral tubercle and two retrolateral, five ventral. Femora III –IV with two dorsoapical tubercles; Legs I –IV with small tubercles. Tarsal segmentation: 7, 13, 6, 7.

Distribution: Recorded only from the type locality (Pico da Neblina  ), from 100 to 400 m.a.s.l.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Stygnidae

Genus

Auranus