Tafana orinoco De Oliveira & Brescovit 2021, sp. nov.

Tafana orinoco sp. nov.

urn:lsid:zoobank.org:act: 34463201-9F72-43FF-886B-A9EFCE74C526

Figs 30–31, 33H, 34

Diagnosis

Males of Tafana orinoco sp. nov. resemble those of T. pastaza sp. nov. by having the shape of the apophysis at the base of the embolus bifid, but differ by the primary apophysis conical and curved in the apex and secondary apophysis furrowed, median tibial apophysis short and triangular in retrolateral position (Figs 30C–E, 31A–C). Females differ from those of the other species in the silhavyi group by having quadrangular atrium and copulatory ducts extremely large and short in anterior region of the vulva (Figs 30G, 33H).

Etymology

The specific name, a noun in apposition, is a tribute to ‘River Orinoco’, one of the most important rivers of the South American continent.

Material examined

Holotype VENEZUELA • 1♂; Mawaca, Federal Territory of Amazonas; 84 km SE of La Esmeralda; [3°10′22.73″ N, 65°32′32.39″ W]; 5 Mar. 1985; J. Latke and R. Candia leg.; MIZA 07062.

Paratype VENEZUELA • 1 ♀; same collection data as for holotype; MIZA 07062.

Other material

VENEZUELA – Amazonas Division • 1 ♂; Federal Territory of Amazonas, Cerro de La Neblina; [00°53′11″ N, 65°59′22″ W]; 12 Feb. 1985; W.E. Steiner leg.; USNM • 1 ♂, 1 ♀; Mawaca, Central, Federal Territory of Amazonas; [3°10′22.73″ N, 65°32′32.39″ W]; 5 Mar. 1985; J. Latke and R. Candia leg.; MIZA 07062.

Description

Male (holotype, MIZA 07062)

COLOR. Exemplar probably discolored. Carapace reddish brown (Fig. 30A). Labium, sternum and endites reddish brown. Chelicerae reddish. Legs I–IV reddish with spots on the articles. Abdomen with dark spots (Fig. 30A).

MEASUREMENTS. Total length 7.9, carapace length 3.7, width 3.0. Clypeus height 0.1. Eye diameters and interdistances: AME 0.12, ALE 0.18, PME 0.16, PLE 0.16; AME–AME 0.04, AME–ALE 0.02, PME– PME 0.1, PME–PLE 0.08, ALE–PLE 0.02. Chelicerae 1.5 long, with four promarginal teeth and seven retromarginal denticles.

LEG MEASUREMENTS. I—femur 4.0 /patella 1.6/ tibia 4.2/ metatarsus 3.9 / tarsus 1.9/ total 15.6; II— 3.9/ 1.59 / 3.8/ 3.6/ 1.5 /14.39; III—3.2 / 1.4/ 2.5/ 3.1/ 1.09 / 11.29; IV—4.1 / 1.5/ 3.6/ 4.5/ 1.3 /15.0.

LEG SPINATION. I—tibia v2-2-2, p1-1-0, r1-1-0, metatarsus v2-0-0, p0-1-0, r0-1-0; II—tibia v2-2-2, p1-1-0, r1-1-0, metatarsus p0-1-0, r0-1-0; III—tibia p1-1-1, r1-1-1; IV—tibia p1-1-1.

PALP. Retrolateral tibial apophysis short and curved; cymbium without retrolateral projection; apophysis at the base of the embolus bifid with secondary apophysis furrowed; embolus short; median apophysis long and curved apically; sperm duct with secondary looping not reaching the apex of the tegulum; subtegulum strongly projected; ventral tegular process inconspicuous (Figs 30C–E, 31A–C).

ABDOMEN. Length 4.1, epigastric furrow 1.0 from tracheal spiracle, spiracle 2.0 from base of spinnerets.

Female (paratype, MIZA 07062)

COLOR. Coloration as in males of this species (Fig. 30B).

MEASUREMENTS. Total length 7.5, carapace 3.4, width 2.6. Clypeus height 0.1. Eye diameters and interdistances: AME 0.12, ALE 0.14, PME 0.14, PLE 0.12; AME–AME 0.02, AME–ALE 0.02, PME– PME 0.18, PME–PLE 0.12, ALE–PLE 0.04. Chelicerae 1.6 long, with four promarginal teeth and five retromarginal denticles.

LEG MEASUREMENTS. I—femur 3.1/ patella 1.4/ tibia 3.22 / metatarsus 2.9 /tarsus 1.1/ total 11.72; II— 3.1/ 1.2/ 3.0 /2.72 / 1.1 /11.12; III—2.1 / 1.1/ 1.6/ 2.2/ 0.73 / 7.73; IV—3.3/ 1.24 / 2.9/ 3.3/ 0.84 / 11.58.

LEG SPINATION. I—tibia v2-2-2, p1-1-0, r1-1-0, metatarsus v2-0-0, p0-1-0, r0-1-0; II—tibia v2-2-2, p1-1-0, r1-1-0, metatarsus p0-1-0, r0-1-0; III—tibia p1-1-1, r1-1-1; IV—tibia p1-1-1.

EPIGYNUM. Hood narrow and rounded, connected to the lateral lobes; wide atrium; epigynal plate not covered by hyaline cuticle in the posterior region; sinuous and narrow lateral lobes. Internally, copulatory ducts large and short; secondary spermathecae above the primary spermathecae; primary spermathecae separated; fertilization ducts long, superimposed on the primary spermathecae (Figs 30F–G, 33H).

ABDOMEN. Length 4.0, epigastric furrow 0.5 from tracheal spiracle, spiracle 2.1 from base of spinnerets.

Distribution

Known only from Venezuela (Fig. 34).