Roquettea peba, Kury, Adriano B. & Ferreira, Cláudio P., 2012

Kury, Adriano B. & Ferreira, Cláudio P., 2012, Two new species of Roquettea Mello-Leitão, 1931 from northern Brazil (Opiliones: Laniatores: Cosmetidae), Zootaxa 3328, pp. 35-46 : 41-45

Roquettea peba sp. nov.

( Figs. 18–31 )

Type material. 3 holotype ( MNRJ 7080) Brazil, Pará State, Parauapebas, Serra do Norte, Rio Parauapebas, Hotel Carajás , backyard on a large bank with a lot of grass and a few trees (-6.067282° -49.909453° ca. 160 m). 13.VII.2009, D. R. Pedroso leg. WWF Ecoregion Mato Grosso seasonal forests (NT0140).

Etymology. Refers to “ Peba ”, the nickname of Parauapebas, the type locality.

Diagnosis. Eye mound high and wide, elevated as two globoid protuberances ( Figs. 19, 21 ). Area I of male elevated forming a mamilliform elevation topped by 2 small rounded tubercles ( Figs. 18–19 ), area III of male armed with a pair of thick high spines distally slenderer and darker than background ( Fig. 21 ). Ventral plate extremely elongate, with a shallow parabolic cleft ( Fig. 28 ), glans as a very long column ( Fig. 29 ).

Description. 3 holotype (MNRJ 7080)

Measurements. CL: 1.68, CW: 2.95; AL: 3.12, AW: 4.05. Appendage measurements in Table 1 .

Dorsum ( Figs. 18–19, 21 ). Anterior edge of dorsal scutum smooth, with cheliceral sockets (protoglyphs) almost straight, slightly defined. Central projection of protoglyphs short and obtuse, broad-based, lateral projections of protoglyphs very large and obtuse. Carapace low, not prominent in lateral view, totally smooth. Eye mound wide/large, elevated/high, armed with 2 huge blunt protuberances. Mesotergum elevated, scutal area I armed with a pair of globular convex structures concolorous with background, area III armed with a pair of base inflated paramedian conical processes, elsewhere unarmed. Lateral border of the dorsal scutum containing a longitudinal row of small granules, widest between areas II and III. Posterior edge, free tergites and anal operculum each with a transverse row of small granules.

Venter ( Fig. 20 ). Coxae I to IV, stigmatic area and genital operculum finely granular. Genital segment large enough to be visible laterally, slightly grainy. Free sternites with a transverse row of granules. Stigmatic area Yshaped, with deep transverse posterior groove.

Chelicera ( Fig. 18 ). Bulla of basichelicerite smooth, without teeth, only a small projection on ectal-posterior corner.

Pedipalpus ( Figs. 22–27 ). Femur compressed, strongly convex dorsally with a two-mounded crest ( Fig. 22 ); ventrally with row of 11 setiferous tubercles ( Figs. 22, 24 ). Tibia spatulate ( Fig. 26 ), with mesal edge truncate, but without deep groove ( Figs. 26–27 ); also with ectal-apical expansion bearing 3 + 3 short and thick setiferous tubercles, this expansion opposes to the tarsus, forming a rudimentary chela ( Figs. 24–26 ). Tarsus elongate pyriform, bent at distal 2/3rds ( Figs. 23–26 ).

Legs. Coxae I–IV with a prolatero-dorsal apophysis, coxa I with a large retrolatero-dorsal apophysis. Tarsal counts: 8(3)-x, 15(3)-4(3), 9-9, 10-10.

Color (in alcohol). Dorsal scutum, free tergites and anal operculum Brownish Orange (centroid 54), spines of area III and eye mound Strong Brown (centroid 55), tubercles of area I concolorous with the background. Dorsal scutum densely covered with small spots of Yellowish White (centroid 92) except for regions close to eye mound, anterior border of carapace and paired circular patches in carapace and areas I and II (around the paramedian armature, if present). Posterior border of scutum and free tergites with a middle discontinued transverse row of small spots of Yellowish White (centroid 92). Coxae, genital segment, free sternites and genital operculum Deep Orange (centroid 51). Metatarsi and tibia I–IV with several lighter rings.

Genitalia ( Figs. 28–31 ). Ventral plate (VP) rectangular elongate, with apical corners rounded and a shallow parabolic cleft on distal margin. Base and apex of equal width (sides sub-parallel) in ventral view. Middle part slightly thicker (in lateral view). VP with 7 pairs of lateral setae forming three groups. (1) basal group with 2 pairs of short and straight setae pointing oblique/proximally; (2) intermediate group with one pair of very short and straight setae pointing transversely; (3) distal group with 4 pairs of long sulcate substraight setae. Glans columnar elongate, stylus cylindrical with apex compressed forming a flat crest around the opening with a few ventro-distal lobes and spines, dorsal process elongate rectangular truncate.

Female. Unknown.

Distribution. Known from type locality alone.

Figures

FIGURES 17 – 21. Roquettea spp.: R. carajas sp. nov. 3 holotype (MNRJ 2289): 17. Habitus, frontal view; 18 – 21, R. peba sp. nov. 3 holotype (MNRJ 7080): 18. Habitus, dorsal view; 19. same, lateral view; 20. same, ventral view; 21. same, frontal view. Scale bars = 1 mm.

FIGURES 22 – 27. Roquettea peba sp. nov. 3 holotype (MNRJ 7080), left pedipalpus: 22. Tr-Pa mesal view + Ti, dorso-mesal view + Ta, dorsal view; 23. Tibio-tarsal chela, detail, dorso-apical view; 24. Pa-Ta dorsal view, Fe ventral vew; 25. Ta dorsoectal view, Ti distal part, dorsal view; 26. Pa-Ta, ventro-mesal view; 27. Ti mesal view. Scale bars = 500 µm (Figs. 22, 26), 100 µm (Fig. 23), 200 µm (Figs. 24, 25, 27).

FIGURES 28 – 31. Roquettea peba sp. nov. 3 holotype (MNRJ 7080), penis, distal part. 28. Dorsal view; 29. Lateral view; 30. Ventral view; 31. Detail of glans, lateral view. Scale bars = 100 µm (Figs. 28 – 30), 20 µm (Fig. 31).