Auranus hehu , 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: 11-12

publication ID

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

persistent identifier

http://treatment.plazi.org/id/038C87C8-2907-E442-AAF6-FE9AECEBFDA2

treatment provided by

Plazi

scientific name

Auranus hehu
status

sp. nov.

Auranus hehu  sp. nov.

( Figs. 5View FIGURE 5 A –E, 13 D –F)

Diagnosis: Similar to A. parvus Mello-Leitão, 1941  based on low size of tubercles on dorsal scutum and free sternites (higher on A. hoeferscovitorum  Pinto-da-Rocha, 1997) and penis (shape of ventral plate and enlarged apex of truncus). It differs from A. parvus  in the presence of a spine projecting upwards on area III that is longer than the area length (instead of shorter and backwards in A. parvus  ) and apex of femur IV with two tubercles (absent in A. parvus  ).

Type locality: Brazil, Amazonas, Barcelos ( Tapirapecó  Mountain).

Type material: Brazil, Amazonas, Barcelos ( Tapirapecó  Mountain), collected by A.A. Nogueira. Holotype, 29.X. 2006, 180 m. a.s.l., male (INPA-OP 0983); Paratypes: 29.X. 2006, 180 m. a.s.l., female (INPA-OP 0984); 29.X. 2006, 180 m. a.s.l., male ( INPA); A.A. Nogueira, 2.X. 2006, 450 m. a.s.l., female (MZSP- 36543); 13.X. 2006, 800 m. a.s.l., female (INPA-OP 951); 29.IX. 2006, 180 m. a.s.l., female (MZSP- 36540); 2.X. 2006, 450 m. a.s.l., 2 females (INPA-OP 952).

Etymology: Noun in apposition, “ hehu  ” in the Yanomani language meaning mountain. The Yanomami are native to the region were the material was collected.

Male description (holotype): Measurements: DSL 2.8; PL 1.1; DSW 2.3; PW 2.2; ID 1.6; chelicera III 3.0; III 1.4; pedipalpus 6.6; leg I 9.3; II 15.3; III 11.1; IV 13. 8.

Dorsum ( Fig. 5View FIGURE 5 A –B): Anterior margin with one tubercle each side or smooth. Prosoma with 14 central tubercles. Lateral margin with one row of tubercles from coxa II to groove II. Areas I –II with two tubercles each side; III with two parallel and very large spines with apex backwards, three –four tubercles on external side of each spine. Posterior margin with one tubercle. Free tergite I with 11 tubercles; II with 10; III with nine tubercles. Anal operculum with one row of three median tubercles, five small tubercles on posterior border.

Venter: Coxa I with one median row of six large tubercles, one anterior, five posterior, three apical; II with one median row of 10 tubercles, seven posterior, three apical; III with one row of 11 tubercles, five anterior, seven 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 three tubercles on bulla; II with four tubercles; III with one basal large tubercle, three small distal. With interchelar space.

Pedipalpus: Coxa with one large ventral tubercle, two –three dorsal tubercles. Trochanter with two ventral tubercle (one large), one dorsal. Femur smooth ventrally, slightly swollen at distal third. Patella swollen at distal third. Tibia ( Fig. 5View FIGURE 5 C): ectal IiIi, mesal IiIiii, with seven ventral tubercles. Tarsus ( Fig. 5View FIGURE 5 C): ectal IiIi, mesal IiIiIi, with two ventral rows of small setae.

Legs: Coxa I with two tubercles; II with one anterior, one posterior; III with one anterior fused with one of coxa II; IV with one large apical tubercle and one small lateral. Trochanter I with four ventral tubercles, two dorsal, one retrolateral; II with four ventral, one prolateral, one retrolateral, two dorsal (one larger); III with eight ventral, two retrolateral, two prolateral, two dorsal; IV with three dorsal tubercles (one central larger), two retrolateral, five ventral. Femora II –IV with five dorsoapical tubercles; IV ( Fig. 5View FIGURE 5 D –E) with two rows of ventral tubercles, with one ventroapical tubercle larger. Patella IV ( Fig. 5View FIGURE 5 D –E) tuberculate (two dorsoapical larger). Tibia IV ( Fig. 5View FIGURE 5 D –E) with two ventral rows of large tubercles equal-sized in all extension. Tarsal segmentation: 6, 11/12, 6, 7.

Penis ( Fig. 13View FIGURE 13 D –F): Truncus swollen apically. Ventral plate wide (thinner on lateral margins), distal margin forming a calyx (dorsal apex with a pair of separate triangular, ventral apex projected and bifid), with four distal pairs of cylindrical short setae, four pairs of cylindrical long setae, without intermediate pair of setae.

Color: Dark-brown, dark reticulate on median part of prosoma, chelicera and pedipalpal femur and patella.

Female description (INPA-OP 0984): Measurements: DSL 2.9; PL 1.1; DSW 2.2; PW 2.0; ID 1.4; chelicera II 1.8; III 0.9; pedipalpus; leg I; II; III; IV.

Prosoma with 18 central tubercles. Area III with one tubercle on external side of each spine. Posterior margin smooth. Free tergite I with eight tubercles; II with nine tubercles; III with seven tubercles. Anal operculum with one row of four median tubercles, six small tubercles on posterior border. Cheliceral segment I with two tubercles on bulla; II with four tubercles; III with three small distal. Pedipalpal tarsus: ectal IiIi, mesal IiIiii. Legs: trochanter I with four ventral tubercles, three dorsal, one retrolateral; II with five ventral, one prolateral, one retrolateral, four dorsal; III with seven ventral, three retrolateral, two prolateral, smooth dorsally; IV with three dorsoapical tubercles (one central larger), four small dorsal, one prolateral tubercle and two retrolateral (apical larger), five ventral (central larger). Femora I –IV with two dorsoapical tubercles; IV with two rows of ventral tubercles, with one apical tubercle larger on each row. Patella IV with small tubercles. Tibia IV with small tubercles. Tarsal segmentation: 6, 10, 6, 7.

Distribution: Recorded in northern Amazonas, upper Negro river, ( Tapirapecó  ) from 180 m. a.s.l. up to 800 m. a.s.l.

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Stygnidae

Genus

Auranus