Masteria sabrinae, Passanha & Brescovit, 2018

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73 : 48-50

Masteria sabrinae n. sp.

( Figs 27 , 31C , 32 )

Types. MARTINIQUE. ♂ holotype , ♀ paratype, Plateau de La Concorde (14°40’00”N; 61°06’00”W) , Martinique, 2012-2013, Museum team leg., deposited in CPM. ♀ paratype with same data of holotype ( IBSP 167200 ) .

Additional material examined. MARTINIQUE. Plateau de La Concorde (14°40’00”N; 61°06’00”W), 9♂, 2012-2013, Museum team leg. ( CPM) ; 4♂ Plateau de La Concorde (14°40’00”N; 61°06’00”W), 9♂, 2012-2013, Musem team leg. ( IBSP 167201 , 167202 ) .

Diagnosis. Males from Masteria sabrinae n. sp. resemble those of Masteria spinosa , M. simla and M. galipote n. sp. in having a paraembolic apophysis ( Fig. 27B–C ), but differ in having a conical tooth in the embolar base ( Fig. 27B ). Females resemble those of Masteria manauara and M. petrunkevitchi in the unilobed spermathecae, but differ in the elongated lobe, thickened duct and apex curved to ectal side ( Fig. 27D–F ).

Etymology. In honor of the biologist Sabrina de Souza Ferreira , the senior author`s fiancée.

Description. Male (Holotype). Color: Carapace in dorsal view and legs yellowish, carapace in ventral view and abdomen whitish. Total length 3.47. Carapace 1.72 long, 1.32 wide. Abdomen 1.75 long. Fovea 0.12. Clypeus 0.04. Ocular tubercle 0.13 long, 0.25 wide. Eyes: eight, posterior row recurved ( Fig. 27A ). AME, 0.02, ALE 0.10, PME 0.05, PLE 0.08. Basal segment of chelicerae with 11 prolateral teeth, and 12 smaller mesobasal teeth. Labium 0.25 long, 0.32 wide. Sternum 0.79 wide, 0.91 long. Palp: femur 0.94/ patella 0.60/ tibia 0.72/ tarsus 0.50/ total 2.76. Legs I: femur 1.47/ patella 0.72/ tibia 1.25/ metatarsus 0.94/ tarsus 0.82/ total 5.20; II: femur 1.19/ patella 0.63/ tibia 0.94/ metatarsus 0.88/ tarsus 0.72/ total 4.36; III: 1.25/ 0.47/ 0.88/ 0.97/ 0.69/ 4.26; IV: 1.69/ 0.72/ 1.35/ 1.41/ 0.94/ 6.11; Leg formula 4123; Spination: palp: femur p1, patella d1-3ap, p1, tibia p1; Legs I: patella v1-3 ap, p1, tibia v1-1, metatarsus v1-1 -1; II: femur p1, patella v1-3 ap, p1, tibia v1-1 -3ap, p1-1, metatarsus v1-1 -1, p1; III: femur p1, patella v1-3 ap, p1-1, r1, tibia d2b-1-1, v1-1 -1-1-3ap, p1-1, r1-1, metatarsus d1-2, v3-3 -3, p1-1; IV: femur p1, r1, patella v1-3 ap, p1, r1, tibia d2b-1-1, v1-2 -3ap, p1-1, r2-1-1, metatarsus d1-1-2ap, v2-3 -3ap, p1, r1. Tibia I: P1 with strong and projected spur with semi-quadrate apex, P2 with strong spine with slightly projected base below P1 and P3, and P3 two strong spines sharing the same projected base. Metatarsus I with flattened basal spine and basal depression associated with prolateral process of tibia I ( Figs 27E , 31C ). Palpal tibia 2.5 times length of cymbium, basally dilated, with rows of ventral and dorsal elongated slender setae and 18-20 strong retrolateral spines on tibia ( Fig. 27C ). Cymbium as long as wide with 4 apical spines. Palpal bulb piriform, embolus as long flattened paraembolic apophysis, coiled distally ( Fig. 27B–C ). PLS: basal, medial and apical, 0.50, 0.47, 0.47 long.

Female (Paratype, IBSP 167200). Color: Carapace in dorsal and ventral views, and legs yellowish, abdomen whitish. Total length 3.79. Carapace 1.66 long, 1.29 wide. Abdomen 2.13 long. Fovea 0.10. Clypeus 0.03. Ocular tubercle 0.13 long, 0.25 wide. Eyes: eight, posterior row slightly recurved. AME 0.02, ALE 0.10, PME 0.04, PLE 0.06. Basal segment of chelicerae with 11 prolateral teeth, and 12 smaller mesobasal teeth. Labium 0.19 long, 0.38 wide. Sternum 0.75 wide, 0.88 long. Palp: femur 0.94/ patella 0.43/ tibia 0.69/ tarsus 0.69/ total 2.75; Legs I: femur 1.41/ patella 0.72/ tibia 1.07/ metatarsus 0.75/ tarsus 0.60/ total 4.55; II: 1.13/ 0.66/ 0.75/ 0.69/ 0.57/ 3.80; III: 1.10/ 0.47/ 0.69/ 0.79/ 0.60/ 3.65; IV: 1.41/ 0.63/ 1.10/ 0.94/ 0.72/ 4.80; Leg formula 4123. Spination: palp: femur p1, patella v1-3 ap, p1, r1, tibia v1-1 -3ap, tarsus v1 b; Legs I: femur p1, patella v1-3 ap, p1-1, r1, tibia v1-1 -3ap, metatarsus v1-1; II: femur p1, patella v1-1 -3ap, p1-1, r1, tibia v1-1 -3ap, p1, metatarsus v1-1 -1, p1; III: femur p1, r1, patella v1-3 ap, p1-1, r1-1, tibia d2b-1-1, v1-1 -1-3ap, p1-1, r1, metatarsus d1-2, v2 b-3-3ap, p1, r1; IV: femur p1, r1, patella v1-1 -3ap, p1-1, r1-1, tibia d1b-1, v1-1 -1-3ap, p1-1, r2-1-1, metatarsus d1-2, v2 b-3-3ap, p1-1, r1. Palpal claw with 17 teeth. Spermathecae with globose apex, on narrow glandular region ( Fig. 27E–F ). PLS: basal, medial and apical, 0.60, 0.41, 0.44 long.

Variation. 5 males: total length 3.00–3.88.

Distribution. Martinique ( Fig. 32 ).

Figures

FIGURE 27. Masteria sabrinae n. sp. (male and female, IBSP 167201 and IBSP 167202). A Male eyes, dorsal view; B Palpal bulb, ventral view; C Grouped spines of palpal tibia and paraembolic apophysis, retrolateral view; D Prolateral processes of tibia I (left leg, proventral view); E, F. Female genitalia, dorsal view. Abbreviations: BS, basal spine; PA, paraembolic apophysis; P1, Process 1; P2, Process 2; P3, Process 3. Scale bar: A 200µm; B, C, D, E, F 100µm.

FIGURE 31. Prolateral processes of leg I. A Masteria spinosa. B M.simla. C M. sabrinae. D M. galipote. Abbreviations: BS, basal spine; P1, Process 1; P2, Process 2; P3, Process 3. Scale bar: A 100µm; B 50µm, C 100µm, D 100µm.

FIGURE 32. Distribution map of Masteria species.