Siremata valteri,

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

publication ID 10.5281/zenodo.1441911

publication LSID

persistent identifier

treatment provided by


scientific name

Siremata valteri

n. sp.

Siremata valteri  n. sp.

( Figs 42View FIGURE 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 167204View Materials, 167205View MaterialsGoogleMaps  . PARATYPES; 1 ♂, 1 ♀, same data as holotype deposited in IBSP 167206View Materials and 167207, respectively.GoogleMaps 

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

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. 42BView FIGURE 42), but differ in the median ventral megaspine on the tibia I ( Fig. 42EView FIGURE 42) and in the 6̄8 small grouped spines on the palpal tibia ( Fig. 42DView FIGURE 42). 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. 42FView FIGURE 42).

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. 42AView FIGURE 42). ALE 0.09, PME 0.03, PLE 0.08. Basal segment of chelicerae with 9 prolateral teeth, and 11 smaller mesobasal teeth ( Fig. 41CView FIGURE 41). 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. 42DView FIGURE 42). Cymbium with 2 apical spines. Palpal bulb elongated with elongated embolus, 4̄4.5 time length of tegulum and strong retrolateral curvature ( Fig. 42BView FIGURE 42 ̄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. 42FView FIGURE 42). 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).


Instituto Biologico de Sao Paulo