Protimesius boibumba, Villarreal-Manzanilla, Osvaldo & Pinto-Da-Rocha, Ricardo, 2006

Villarreal-Manzanilla, Osvaldo & Pinto-Da-Rocha, Ricardo, 2006, Five new species of Protimesius from Brazil (Opiliones: Stygnidae), Zootaxa 1325, pp. 219-233 : 225-227

Protimesius boibumba n. sp.

Figs 15–21 , 40–41

Type­material: Male holotype (MZSP­15912), Brazil, Acre, Parque Nacional da Serra do Divisor (Rio Moa, Amazonian Rain Forest, 7°39´S, 72°41´W), XI.1996, R.S. Vieira leg. Female paratype, same data as for holotype.

Diagnosis: Most similar to P. foliadereis n. sp. and P. evelineae (Soares & Soares, 1978) according to: Presence of 1 retrolateral row of tubercles on male femur IV, 1 dorsal row of tubercles on patella IV and 1 ventro­retrolateral row on tibia IV. It differs from these species by the absence of the wide eminence on anterior margin of prosoma and by the absence of the prolateral row of tubercles on tibia IV.

Etymology: “Boi­bumbá” or “Bumba­meu­boi” is a Brazilian dramatic dance performed during the Christmas period, in which the main character is a bull that dies and thereafter is resuscitated. The specific epithet is a noun in apposition.

Description of male (holotype):

Measurements: Dorsal scute length 5.2; prosoma length 2.4; dorsal scute width 4.1; prosoma width 3.8; interocular distance 2.7; chelicera: II 5.7; III 2.3; pedipalpus 21.0; leg I 26.0; II 49.0; III 38.0; IV 49.0.

Dorsum ( Figs 15–16 ): Anterior margin with 1 irregular row of minute granules on each side. Ocularium smooth. Prosoma minutely granular, with 4 large tubercles in medioanterior area. Lateral margin with 1 row of small granules from ocularium to groove IV. Areas I–III minutely granular; III with 2 parallel spines directed upwards. Posterior margin, free tergites and posterior border of anal plate with 1 row of small granules.

Venter: Coxa I with 1 median row of 8–9 tubercles, 2 apical tubercles; II with 1 median row of 11 tubercles, 3–4 apical tubercles; III and IV, free sternites and genital operculum covered with small, irregularly distributed tubercles.

Chelicera: Segment I smooth; II with finger carrying 1 large basal tooth and 5 small distal teeth; III with 1 basal, 1 large median and 4 distal teeth.

Pedipalpus ( Figs 18–19 ): Coxa with 4 ventral and 5 dorsal (mesal one largest) tubercles; trochanter with 0–1 dorsal and 2–3 ventral (basal one largest) tubercles. Femur with 1 basal ventral tubercle. Tibia mesal IiiIi (4>1=2>5>3). Tarsus mesal IiIiIi (1=3>5>2>4=6), ectal IiiIi (1>4>2=5>3).

Legs ( Figs 20–21 ): Coxa I with 2 anterior and 1 posterior tubercles; II with 1 anterior tubercles and 1 posterior tubercles bifid, in contact with 1 tubercles of coxa III; III with 1 posterior tubercles fused with 1 tubercles of coxa IV. Trochanter I with 3 ventral tubercles; II with 1–3 (basal one largest) tubercles; III with 5–6 (basal one largest) tubercles; IV minutely granular. Femur IV with 1 row of ventroectal tubercles on distal 2/3, 1 mesal row of small tubercles. Patella IV with dorsal row of tubercles increasing in size apicad, 1 small dorsal tubercle, 1 ventroapical tubercle. Tibia with 1 row of large tubercles (apically bifid) running from basal­ventral to mesal. Tarsal segmentation: 8, 21, 8, 9.

Penis ( Figs 40–41 ): Ventral plate with lateral and distal margin almost straight, 3 curved distal setae, 1 intermediary pair, 5 basal pairs of straight setae; dorsal process present; stylus swollen apically.

Color: Yellowish brown, free tergites darker. Anterior part of prosoma with black reticulation.

Description of female (paratype):

Measurements: Dorsal scute length 4.1; prosoma length 2.1; dorsal scute width 3.4; prosoma width 4.1; interocular distance 4.4; chelicera: II 2.6; III 1.4; pedipalpus 19.5; leg I 25.0; II 48.0; III 35.0; IV 46.5.

Somatic morphology: Similar to male, except for: Prosoma ( Fig. 17 ) less granular than in male. Fixed finger of chelicera with 4 small teeth; segment III with 1 large basal tooth, 3 small median teeth. Leg IV: Trochanter smooth; patella with small dorso­distal tubercle; tibia smooth. Distal third of tibia II and IV lighter than in male. Tarsal segmentation: 8, 20, 8, 9.

Teratology: In the male holotype the right spine of area III is bifid instead of simple.

Figures

FIGURES 15 – 21. Protimesius boibumba n. sp., male holotype (15 – 16, 18 – 21), female paratype (17). 15, 17 Dorsal view of body. 16 Lateral view of body. 18 – 19 Right palpus (18 ectal, 19 mesal view). 20 – 21 Proximal segments of leg IV (20 dorsal, 21 ventral view). Scale bars: 1 mm.

FIGURES 36 – 45. Protimesius spp., distal portion of penis, dorsal (36, 38, 40, 42, 44) and lateral view (37, 39, 41, 43, 45). Protimesius foliadereis n. sp. (36 – 37), Protimesius junina n. sp. (38 – 39), Protimesius boibumba n. sp. (40 – 41), Protimesius cirio n. sp. (42 – 43), Protimesius carnaval n. sp. (44 – 45). Scale bars: 0.1 mm.