Masteria petrunkevitchi ( Chickering, 1964 )

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73 : 15-17

Masteria petrunkevitchi ( Chickering, 1964)

( Figs 8 , 29A , 32 )

Accola spinosa: Petrunkevitch, 1929: 13 , figs 1–5 (misidentified female).

Accola petrunkevitchi Chickering, 1964: 175 , figs 1–4.

Masteria petrunkevitchi: Raven, 1979: 625 .

Type. PUERTO RICO. ♂ holotype , ♀ allotype, University of Puerto Rico, Mayaguez , Puerto Rico, I.1964, A. M. Chickering leg., deposited in MCZ, examined.

Additional material examined. PUERTO RICO. Rio Grande: El Verde (18°20'27"N; 65°49'34"W), 23. III.1990, 1 ♂ ( AMNH) ; El Verde , Puerto Rico University, Biology Station, (18°20'27"N; 65°49'34"W), 17. II.1969, 2 ♀, L. Herman leg. ( AMNH) ; Ponce: Toro Negro Forest (18°10’24.31”N; 66°29’32.32”W), 28. VII.1966, 1 ♂, S. Peck leg. ( AMNH) ; Cayey (18°6.71’46''N; 66°96’W), 30. V.1915, 1 ♀ ( AMNH) ; San Sebastian (18°20’14”N; 66°59’26”W), IV.1963, 1 ♀, S. Aceudo leg. ( AMNH) .

Diagnosis. Males of Masteria petrunkevitchi resemble those of M. barona and M. soucouyant n. sp. in the elongated embolus and short tegulum, but differ from M. barona and M. soucouyant n. sp. in the presence of grouped spines on the palpal tibia ( Fig. 8C ) (that, in the latter, are in the basal portion; Fig. 8C ). Females resemble those of M. manauara and M. sabrinae n. sp. in the unilobed spermathecae, but differ in the inconspicuous duct and the large interdistance between spermathecae ( Fig. 8E ).

Description

Male ( Puerto Rico, El Verde, AMNH). Color: Carapace in dorsal view yellow and in ventral view whitish, legs and abdomen in ventral view yellow and dorsal surface of abdomen whitish. Total length 3.73. Carapace 1.88 long, 1.35 wide. Abdomen 1.85 long. Fovea 0.14. Clypeus 0.06. Ocular tubercle 0.20 long, 0.26 wide. Eyes: eight, posterior row slightly recurved ( Fig. 8A ). AME 0.02, ALE 0.09, PME 0.05, PLE 0.09. Basal segment of chelicerae with 11 prolateral teeth and 12 smaller mesobasal teeth. Labium 0.14 long, 0.38 wide. Sternum 0.85 wide, 0.94 long. Palp: femur 0.98/ patella 0.55/ tibia 0.88/ tarsus 0.45/ total 2.86; Legs I: femur 1.45/ patella 0.88/ tibia 1.28/ metatarsus 1.00/ tarsus 0.83/ total 5.44; II: 1.15/ 0.58/ 0.93/ 0.88/ 0.63/ 4.17; III: 1.08/ 0.60/ 0.85/ 0.93/ 0.68/ 4.14; IV: 1.50/ 0.78/ 1.25/ 1.30/ 0.80/ 5.63; Leg formula 4123. Spination: Palp: patella v1, tibia v1-1 -1-1-1-1-1, p1; Legs I: tibia v1, p1-2ap, metatarsus v1-1 -2ap, p1b; II: femur p1, patella v1-1, p1, tibia v1-1, metatarsus v1-1 -1, p1; III: femur p1, r1, patella v2 ap, p1, r1-1, tibia d1-1, v1-1 -1-3ap, p1- 1, r1-1, metatarsus d1-1-2-2-1, v3-3 -3ap, p1, r1-1-1; IV: femur r1, patella v2 ap, r1, tibia d1-1, v1-1 -1-3ap, p1- 1-1, r1-1, metatarsus d2-1-2, v3-3 -3ap, p1-1, r1-1-1. Tibia I: P1 absent, P2 with an apical strong spine, and P3 with a cracked apical spine ( Figs 8D , 29A ). Metatarsus I with flattened basal spine and basal depression associated with prolateral processes of tibia I ( Fig. 8D , 29A ). Palpal tibia two to three times size of cymbium, with row of ventral spines, and 15 basal grouped spines ( Fig. 8C ). Cymbium as long as wide, with four apical spines. Palpal bulb elongated with short tegulum, embolus 1.5 times size of tegulum, with discrete curvature ( Fig. 8B ). PLS: basal, medial and apical segments, 0.45, 0.35, 0.40 long.

Female ( Puerto Rico, San Sebastian, AMNH). Color: Carapace in dorsal and ventral views, legs and abdomen light brown. Total length 3.70. Carapace 1.63 long, 1.22 wide. Abdomen 2.07 long. Fovea 0.10. Clypeus 0.03. Ocular tubercle 0.16 long, 0.24 wide. Eyes: eight, posterior row slightly recurved. AME 0.02, ALE 0.10, PME 0.04, PLE 0.05. Basal segment of chelicerae with 11 prolateral teeth, and 12 smaller mesobasal teeth. Labium 0.15 long, 0.32 wide. Sternum 0.76 wide, 0.87 long. Palp: femur 0.80/ patella 0.40/ tibia 0.68/ tarsus 0.70/ total 2.58; Legs I: femur 1.23/ patella 0.60/ tibia 1.00/ metatarsus 0.78/ tarsus 0.63/ total 4.24; II: 1.03/ 0.58/ 0.75/ 0.68/ 0.58/ 3.62; III: 0.98/ 0.43/ 0.68/ 0.75/ 0.53/ 3.37; IV: 1.28/ 0.65/ 1.10/ 1.08/ 0.68/ 4.79; Leg formula 4123. Spination: palp: femur p1, patella d1, v1, tibia v2-2 -3ap, p1, tarsus v2-1 - 1; Legs I: femur p1, patella v1-1, tibia v1-1 -3ap, p1, metatarsus v1-1 -1; II: femur r1, patella d1, v1-1, p1, r1, tibia v1-1 -3ap, p1, r1, metatarsus v1-1 -1; III: femur r1, patella v1, p1, r1-1, tibia d1-1, v1-2 -3ap, p1, r1-1, metatarsus d1-1-2, v1-3 -3ap, p1-1, r1; IV: femur r1, patella v2, p1, r1, tibia d1-1-1, v1-2 -3ap, p1-1, 1-1, metatarsus d1-1-2, v1-3 -3ap, p1-1, r1. Palpal claw with 18 teeth. Genitalia with two spermathecae, unilobed, short and globose ducts with dense basal glandular region ( Fig. 8E ). PLS: basal, medial and apical segments, 0.42, 0.34, 0.36 long.

Variation. 2 males: total length 3.71–3.73. 4 females: total length 2.97–3.88.

Distribution. Puerto Rico ( Fig. 32 ).

Figures

FIGURE 8. Masteria petrunkevitchi (Chickering, 1964). (male and female, Rio Grande, El Verde, Puerto Rico University, Biology Station, Puerto Rico, AMNH) A Male eyes, dorsal view; B Bulb, prolateral view; C Retrolateral grouped spines on palpal tibia, retrolateral view; D Prolateral process of tibia I (left leg, proventral view); E Female genitalia, dorsal view. Abbreviations: BS, basal spine; P2, Process 2; P3, Process 3. Scale bars: A 50µm; B, C, D, E 100µm.

FIGURE 29. Prolateral processes of leg I. A Masteria petrunkevitchi. B M. barona. C M. soucoyant. D M. yacambu. E M. colombiensis. F M. downeyi. Abbreviations: BS, Basal spine; P1, Process 1; P2, Process 2; P3, Process 3. Scale bar: A 100µm; B 200µm, C 100µm, D 100µm, E 0.1mm, F 50µm.

FIGURE 32. Distribution map of Masteria species.