Siremata valteri, Passanha & Brescovit, 2018

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73 : 63-66

Siremata valteri n. sp.

( Figs 42 , 45)

Types. BRAZIL. ♂ holotype, ♀ paratype, Benjamin Constant (4°22’58”S; 70°1’51”W), Amazonas, 2010, P. S. Pompeu leg., deposited in IBSP 167204 , 167205 . PARATYPES; 1 ♂, 1 ♀, same data as holotype deposited in IBSP 167206 and 167207, respectively.

Additional material examined. BRAZIL, Amazonas: Benjamin Constant (4°22’58”S; 70°1’51”W), 6♂, 1♀, 2010, P. S. Pompeu leg. ( IBSP 167208 ).

Etymology. In honor of the senior author`s grandfather, Valter de Sá, in memorium.

Diagnosis. Males of Siremata valteri n. sp. resemble those of S. lucasae n. sp. in the elongated palpal bulb ( Fig. 42B ), but differ in the median ventral megaspine on the tibia I ( Fig. 42E ) and in the 6̄8 small grouped spines on the palpal tibia ( Fig. 42D ). Females resemble those of S. lucasae n. sp. in the spermathecae having long ducts and globose distal region, but differ in the absence of glandular area ( Fig. 42F ).

Description. Male (Holotype). Color: carapace in dorsal view and legs light brown, carapace in ventral view whitish and abdomen yellowish brown. Total length 2.35. Carapace 1.19 long, 1.00 wide. Abdomen 1.16 long. Fovea 0.19. Clypeus 0.01. Ocular tubercle 0.19 long, 0.35 wide. Eyes: six, posterior row straight ( Fig. 42A ). ALE 0.09, PME 0.03, PLE 0.08. Basal segment of chelicerae with 9 prolateral teeth, and 11 smaller mesobasal teeth ( Fig. 41C ). Labium 0.16 long, 0.25 wide. Sternum 0.69 wide, 0.79 long. Palp: femur 0.60/ patella 0.35/ tibia 0.50/ tarsus 0.29/ total 1.74; Legs I: femur 1.10/ patella 0.60/ tibia 0.88/ metatarsus 0.66/ tarsus 0.57/ total 3.81; II: 0.82/ 0.50/ 0.60/ 0.50/ 0.50/ total 2.92; III: 0.75/ 0.35/ 0.53/ 0.56/ 0.60/ 2.79; IV: 1.04/ 0.44/ 0.72/ 0.79/ 0.63/ 3.62; Leg formula 1423; Spination: palp: patella d3ap, v1-2 ap, tibia p1; Legs I: femur p1, patella v1-3 ap, tibia v1-1 (megaspine), metatarsus v1-1 -1; II: femur p1, patella v1-3 ap, p1-1, tibia v1-1 -3ap, p1, metatarsus v1-1 -1, p1; III: femur p1, r1, patella v1-3 ap, p1-1, r1, tibia v1-1 -1-3ap, p1-1, r1, metatarsus d1-2ap, v2-2 -3ap, p1; IV: femur p1, r1, patella v1-3 ap, p1, r1, tibia v1-1 -1-3ap, p1-1, r2-1-1, metatarsus d1-2ap, v2-2 -3ap, p1, r1. Tibia I with megaspine as fig. 42E. Palpal tibia twice length of cymbium, basally dilated, with row of dorsal elongated slender setae, tibia with 10̄15 retrolateral elongated and grouped spines ( Fig. 42D ). Cymbium with 2 apical spines. Palpal bulb elongated with elongated embolus, 4̄4.5 time length of tegulum and strong retrolateral curvature ( Fig. 42B ̄C). PLS: basal, medial and apical, 0.32, 0.32, 0.41 long.

Female (Paratype, IBSP 167206). Color: Carapace in dorsal view yellowish, carapace in ventral view and legs whitish and abdomen light brown. Total length 3.11. Carapace 1.54 long, 1.13 wide. Abdomen 1.57 long. Fovea 0.08. Clypeus 0.03. Ocular tubercle 0.16 long, 0.22 wide. Eyes: 6, both rows straight. ALE 0.08, PME 0.02, PLE 0.07. Basal segment of chelicerae with 13 prolateral teeth, and 10̄12 smaller mesobasal teeth. Labium 0.19 long, 0.29 wide. Sternum 0.69 wide, 0.82 long. Palp: femur 0.75/ patella 0.41/ tibia 0.57/ tarsus 0.60/ total 2.33; Legs I: femur 1.00/ patella 0.54/ tibia 0.79/ metatarsus 0.69/ tarsus 0.57/ total 3.59; II: 0.88/ 0.51/ 0.66/ 0.57/ 0.54/ 3.16; III: 0.85/ 0.47/ 0.57/ 0.66/ 0.51/ 3.06; IV: 1.04/ 0.54/ 0.82/ 0.85/ 0.60/ 3.85. Leg formula 4123. Spination: palp: femur p1, patella d1, v2 ap, p1, tibia d2ap, v1-1 -3ap, p1-1-1, tarsus v1 b-1; Legs I: femur p1, patella v1-3 ap, p1-1, tibia v1-1 -3ap, p1-1-1-1-1-1, r1-1-1-1-1, metatarsus v1-1 -3ap, p1-1-1, r1-1-1-1; II: patella v1-3 ap, p1-1-1, tibia d2b, v1-1 -3ap, p1-1-1, metatarsus v1-1 -1, p1; III: femur p1, r1, patella d1, v1-3 ap, p1-1-1, r1-1, tibia d1b, v1-1 - 3ap, p1-2-2-1, r2-1-1-1, metatarsus d1-1, v1-1 -3ap, p1, r1; IV femur p1, patella d1, v1-3 ap, p1-1, r1-1, tibia d1-1, v1-1 -1-3ap, p1-1-1, r2-1-1, metatarsus d1-2ap, v2-1 -3ap, p1-1, r1-1. Palpal claw with 13 teeth. Spermathecae bilobed, ectal lobe smaller than inner, with sinuous ducts and globose apex, large glands in ducts ( Fig. 42F ). PLS: basal, medial and apical, 0.38, 0.41, 0.50 long.

Variation. 6 males: total length 2.13–2.75.

Distribution. Brazil, Amazonas, Benjamin Constant ( Fig. 45).

Figures

FIGURE 41. Siremata new genus. A Siremata valteri n. sp., male (IBSP 167208), serrula, lateral view; B Siremata lucasae n. sp., male (IBSP 167215), trichobothria of leg I, dorsal view; C Siremata valteri n. sp., male (IBSP 167208), teeth row of chelicerae, ventral view; D Siremata lucasae n. sp., male (IBSP 167215), tarsal organ of leg I, dorsal view. Scale bar: A 40µm; B 40µm; C 100µm; D 5µm.

FIGURE 42. Siremata valteri n. sp. (male and female, IBSP 167208). A Male eyes, dorsal view; B Palpal bulb, ventral view; C Embolus tip, ventral view; D Retrolateral grouped spines on palpal tibia, retrolateral view; E Ventral medial megaspine on tibia I (right leg, proventral view); F Female genitalia, dorsal view. Scale bar: A, B 100µm; C 10µm; D 100µm; E 200µm; F 50µm.