Chickering, 1966 : 162 Masteria barona : Brignoli, 1983: 126 On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae) Passanha, Victor Brescovit, Antonio D. Zootaxa 2018 2018-08-30 4463 1 1 73 936S7 (Chickering, 1966) Chickering 1966 [151,612,1447,1474] Arachnida Dipluridae Masteria GBIF Animalia Araneae 16 17 Arthropoda species barona     Accola barona  Chickering, 1966: 162, figs 9–11.   Masteria barona: Brignoli, 1983: 126.     Type. TRINIDAD AND TOBAGO. ♂ holotype, William Beebe Tropical Research Station( 10°41'1"N; 61°17'W), Arima Valley, Arima, Saint George County, Trinidadand Tobago,  23.IV.1964, A. M. Chickeringleg., deposited in MCZ, examined.   Additional material examined: TRINIDAD AND TOBAGO.   Saint GeorgeCounty,  Arima, Las Lapas Road( 10°37’0”N; 61°16’0”W),  23.VII.1979, 2♂, L.N. Sorkinleg. ( AMNH);  Andrew’s Trace( 10°37’0”N; 61°16’0”W),  16.VII.1979, 2♀, L.N. Sorkinleg. ( AMNH);  ArimaValley ( 10°37’0”N; 61°16’0”W),  10–22. II.1964, 1♂, 4♀, P. Wygodzinsky, D. Rosenleg. ( AMNH).   Diagnosis.Males of  Masteria baronaresemble those of  M. petrunkevitchiand  M. soucouyant  n. sp.in the elongated shape of the palpal bulb. They differ from those of  M. petrunkevitchiin the presence of only six eyes ( Fig. 9A), and from  M. soucouyant  n. sp.in the absence of spines on the retrolateral palpal tibia. Females differ from those of the other species in the bilobed spermathecae, with similar height and not sinuous ( Fig. 9F–G). Description Male ( Trinidad, Saint GeorgeCounty, Arima, Las Lapas road, AMNH). Color: Carapace in dorsal and ventral views and legs yellowish brown, whitish abdomen. Total length 4.56. Carapace 2.04 long, 1.48 wide. Abdomen 2.52 long. Fovea 0.09. Clypeus 0.03. Ocular tubercle 0.12 long, 0.24 wide. Eyes: six, posterior row slightly recurved ( Fig. 9A). AME absent, ALE 0.11, PME 0.07, PLE 0.09. Basal segment of chelicerae with 11 prolateral teeth, and 11 smaller mesobasal teeth. Labium 0.19 long, 0.32 wide. Sternum 0.96 wide, 0.76 long. Palp: femur 1.14/ patella 0.60/ tibia 1.08/ tarsus 0.30/ total 3.12; Legs I: femur 1.74/ patella 0.72/ tibia 1.56/ metatarsus 1.32/ tarsus 0.84/ total 6.18; II: 1.74/ 0.72/ 1.02/ 1.14/ 0.84/ 5.46; III: 1.56/ 0.72/ 1.08/ 1.20/ 0.84/ 5.40; IV: 1.98/ 0.90/ 1.80/ 1.68/ 0.96/ 7.32; Leg formula 4123; Spination: Legs I: tibia v2, p1, metatarsus v1-1ap; II: patella v1ap, tibia v1-1-1ap, p1, metatarsus v1-1-1, p1; III: patella v1ap, r1, tibia v1-1- 2ap, p1-1, r1-1-1, metatarsus d1, v2-2-1, p1-1-1, r1-1-1; IV: patella v2ap, r1, tibia d1-1, v1-1-1-1-1-2ap, p1-1, r1-1-1, metatarsus d1-1, v2-2-3ap, p1-1, r1-1. Tibia I: P3 more apical with two strong apical spines with projected base, P2 a robust spine with normal base just below P3, and a rounded apical spur, P1 ( Figs 9D, 29B). Palpal tibia three times length of cymbium. Cymbium as wide as long, with five apical spines. Palpal bulb with short tegulum, embolus twice length tegulum, with slight median curvature and narrowed distally ( Fig. 9B, C, E). PLS: basal, medial and apical segments 0.62, 0.57, 0.52 long. Female ( Trinidad, Saint GeorgeCounty, Arima, Andrew’s Trace, AMNH). Color: Carapace in dorsal and ventral views yellowish brown, legs light brown and whitish abdomen. Total length, 3.35. Carapace 1.60 long, 1.33 wide. Abdomen 1.75 long. Fovea 0.11. Clypeus 0.04. Ocular tubercle 0.20 long, 0.28 wide. Eyes: six, posterior row slightly recurved. AME absent, ALE 0.12, PME 0.07, PLE 0.11. Basal segment of chelicerae with 11 prolateral teeth, and 10 smaller mesobasal teeth. Labium 0.26 long, 0.28 wide. Sternum 0.76 wide, 0.86 long. Palp: femur 0.90/ patella 0.46/ tibia 0.70/ tarsus 0.68/ total 2.74; Legs I: femur 1.20/ patella 0.62/ tibia 1.02/ metatarsus 0.80/ tarsus 0.62/ total 4.26; II: 1.02/ 0.52/ 0.80/ 0.72/ 0.50/ 3.56; III: 1.10/ 0.57/ 0.87/ 0.90/ 0.57/ 4.01; IV: 1.42/ 0.70/ 1.30/ 1.12/ 0.75/ 5.26; Leg formula 4132; Spination: Palp: tarsus v1b; Legs I: patella v1, tibia v1-1-3ap, p1, r1, metatarsus v1-1ap; II: patella v1, tibia v1-1-3ap, p1, metatarsus v1ap, p1; III: femur r1, patella p1, r1-1, tibia d1, v1-1-1-2ap, p1-1-1, r1-1, metatarsus d1, v1-1-3ap, p1, r1; IV: patella v1-1, p1, tibia d1, v1-1-3ap, p1-1-1-1, r1-1, metatarsus d1, v1-1-3ap, p1-1, r1-1. Palpal claw with 16 teeth. Genitalia with two bilobed spermathecae, each pair over a glandular region slightly elevated, external lobe elongated with globose apex, ental lobe high and uniform ( Fig. 9F–G). PLS: basal, medial and apical 0.60, 0.45, 0.55 long.   Variation. 2 males: total length 4.56–4.62. 6 females: total length 2.84–3.72.   Distribution. North of Trinidad and Tobago( Fig. 33). 1913893202 1964-04-23 MCZ Trinidad & A. M. Chickering Trinidad and Tobago Saint George County 10.683611 Arima Valley 909 -61.283333 William Beebe Tropical Research Station 16 17 2 1 Arima holotype 1913893208 [199,907,1759,1784] Trinidad and Tobago TOBAGO 16 17 1 TOBAGO 1913893205 [918,1153,1760,1783] Trinidad and Tobago Saint George 16 17 1 Saint George 1913893207 1979-07-23 AMNH L. N. Sorkin Trinidad and Tobago 10.616667 Las Lapas Road 21 -61.266666 16 17 2 2 Arima 1913893222 1979-07-16 AMNH L. N. Sorkin Trinidad and Tobago 10.616667 Andrew's Trace 21 -61.266666 16 17 2 2 Arima 1913893211 1964-02-10 1964-02-22 1964-02-10 AMNH P. Wygodzinsky & D. Rosen Trinidad and Tobago 10.616667 Arima 21 -61.266666 16 17 5 4 1 Arima