Masteria yacambu, Passanha & Brescovit, 2018

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73 : 23-24

publication ID 10.5281/zenodo.1441911

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scientific name

Masteria yacambu

sp. nov.

Masteria yacambu View in CoL n. sp.

( Figs 12 View FIGURE 12 , 29D View FIGURE 29 , 32 View FIGURE 32 )

Types. VENEZUELA. ♂ holotype, ♀ paratype, Lara, (09°42’22”N; 69°34’42”W), Yacambu, National Park Yacambu, 14.4 km S. E. Sanare, 1500m, 17.V.1998, R. Anderson leg., deposited in AMNH GoogleMaps .

Etymology. The species epithet is a noun in apposition taken from the type locality.

Diagnosis. Males of M. yacambu n. sp. resemble those of M. colombiensis , M. downeyi , M. lewisi , M. amarumayu n. sp., M. mutum n. sp. and M. aguaruna n. sp. in the piriform palpal bulb, but differ in the embolus tip with distal curvature ( Fig. 12B–C View FIGURE 12 ) and double P 2 in the leg tibia ( Fig. 29D View FIGURE 29 ). Females resemble those of M. tayrona n. sp. in the presence of four lobes on spermathecae ( Fig. 22G View FIGURE 22 ), and differ in the short and uniform ectal lobe ( Fig. 12E View FIGURE 12 ).

Description. Male (holotype). Color: Carapace orange, legs yellow and abdomen whitish. Total length 2.85. Carapace 1.41 long, 1.16 wide. Abdomen 1.44 long. Fovea 0.06. Clypeus absent. Ocular tubercle 0.22 long, 0.25 wide. Eyes: six, posterior row strongly recurved. AME absent, ALE 0.13, PME 0.06, PLE 0.12. Basal segment of chelicerae with 10 prolateral teeth, and 10 smaller mesobasal teeth. Labium 0.16 long, 0.22 wide. Sternum 0.66 wide, 0.88 long. Palp: femur 0.63/ patella 0.47/ tibia 0.63/ tarsus 0.35/ total 2.08; Legs I: femur 1.29/ patella 0.69/ tibia 1.16/ metatarsus 0.94/ tarsus 0.82/ total 4.90; II: 1.04/ 0.54/ 0.79/ 0.75/ 0.57/ total 3.69; III: 0.91/ 0.41/ 0.72/ 0.79/ 0.54/ 3.37; IV: 1.38/ 0.54/ 1.13/ 1.16/ 0.72/ 4.93. Leg formula 4123. Spination: palp: femur p1, patella d1, tibia p1; Legs I: patella v1, tibia v1, p1, metatarsus v1-1 ap; II: patella v1, p1, tibia v1-1 -3ap, p1, metatarsus v1-1 -1, p1; III: femur r1, patella v2, p1-1, r1, tibia v1-1 -3ap, p1-1, r1-1-1, metatarsus d1-2, v1-1 -3ap, p2; IV: femur p1, r1, patella v2, p1, r1-1, tibia d1-1, v1-1 -3ap, p1-1, r2-1-1, metatarsus d1-1-1ap, v2-3 -3ap, p1-1, r1-1. Tibia I: P1 a strong and rounded spur, P2 with two strong spines with slightly projected base below P1 and P3, and P3 two spines on same projected base. Metatarsus I with flattened basal spine and basal depression associated with prolateral processes of tibia I ( Figs 12F View FIGURE 12 , 29D View FIGURE 29 ). Palp: tibia twice length of cymbium, with row of dorsal and ventral elongate slender setae. Cymbium as long as wide, with four apical spines. Bulb piriform with oval tegulum, embolus as long as tegulum, distally tapering ( Fig. 12B–C View FIGURE 12 ). PLS: basal and medial, 0.40, 0.46 long, apical segment lost.

Female (Paratype). Color: Carapace in dorsal view orange, in ventral view and legs yellowish, abdomen whitish. Total length 3.26. Carapace 1.63 long, 1.25 wide. Abdomen 1.63 long. Fovea 0.10. Clypeus absent. Ocular tubercle 0.25 long, 0.19 wide. Eyes: six, posterior row strongly recurved ( Fig. 12A View FIGURE 12 ). AME absent, ALE 0.11, PME 0.06, PLE 0.10. Basal segment of chelicerae with 10 prolateral teeth, and 10 smaller mesobasal teeth. Labium 0.13 long, 0.16 wide. Sternum 0.69 wide, 0.85 long. Palp: femur 0.97/ patella 0.57/ tibia 0.79/ tarsus 0.82/ total 3.15; Legs I: femur 1.38/ patella 0.75/ tibia 1.16/ metatarsus 1.04/ tarsus 0.82/ total 5.15; II: 1.16/ 0.60/ 0.94/ 0.85/ 0.69/ 4.24; III: 1.10/ 0.57/ 0.82/ 0.91/ 0.60/ 4.00; IV: 1.47/ 0.66/ 1.25/ 1.19/ 0.75/ 5.32; Leg formula 4123. Spination: palp: femur p1, patella d1, v1-3 ap, tibia v2-2 -3ap, p1, tarsus v2 b; Legs I: femur p1, patella v1-1, p1, tibia v1-1 -3ap, p1, metatarsus v1-1 -1; II: femur p1, patella v1-2, p1-1, tibia v1-1 -3ap, p1-1-1, metatarsus v1-1 -3ap, p1; III: femur p1, r1, patella v1-2 ap, p1-1, r1, tibia v1-1 -3ap, p1, r1-1, metatarsus d1-1, v2-2 -3ap, p1-1, r1; IV: femur p1, patella v1-2 ap, p1-1, r1-1, tibia v1-2 -2-3ap, p1-1, r2-1-1, metatarsus d1-2ap, v1-1 -3ap, p1-1, r1-1. Palpal claw with 19 teeth. Spermathecae with four short lobes, with globose apex, all on dense glandular region. Lobes similar, except the ectal lobe shortest. Ental lobe occupying median region ( Fig. 12E View FIGURE 12 ). PLS: basal, medial and apical, 0.54, 0.50, 0.50 long.

Distribution. Northern Venezuela ( Fig. 32 View FIGURE 32 ).


American Museum of Natural History













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