Masteria colombiensis Raven, 1981

Passanha, Victor & Brescovit, Antonio D., 2018, On the Neotropical spider Subfamily Masteriinae (Araneae, Dipluridae), Zootaxa 4463 (1), pp. 1-73 : 24-25

Masteria colombiensis Raven, 1981

( Figs 13 , 29E , 33 )

Masteria colombiensis Raven, 1981: 61 , figs 13–18, 20, 22.

Types. COLOMBIA. ♂ holotype , ♀ paratype, Sierra Nevada de Santa Marta (11°14’10”N; 74°12’6”W), San Pedro, Magdalena, 29.III.1975. J. A. Kochalka leg., deposited in AMNH, examined).

Diagnosis. Males of M. colombiensis resemble those of M. downeyi , M. lewisi , M. yacambu n. sp., M. amarumayu n. sp., M. mutum n. sp. and M. aguaruna n. sp. in the piriform bulb, and differ in the coiled distal area of the embolus ( Fig. 13B–C ). The female genitalia are similar to those of M. amarumayu n. sp., M. mutum n. sp. and M. aguaruna n. sp. in the bilobed spermathecae, with the conical ectal lobe. The female differs from those of other species in the short duct on the ental spermathecal lobe ( Fig. 13D–E ).

Description. Male (Holotype). Color: Carapace and legs orange and abdomen light brown. Total length 3.88. Carapace 1.80 long, 1.40 wide. Abdomen 2.08 long. Fovea 0.12. Clypeus 0.04. Ocular tubercle 0.22 long, 0.60 wide. Eyes: eight, posterior row strongly recurved ( Fig. 13A ). AME 0.02, ALE 0.19, PME 0.06, PLE 0.09. Basal segment of chelicerae with nine retrolateral teeth, with 15–20 smaller mesobasal teeth. Labium 0.14 long, 0.34 wide. Sternum 0.48 wide, 1.05 long. Palp: femur 1.00/ patella 0.62/ tibia 0.88/ tarsus 0.48/ total 2.98; Legs I: femur 1.46/ patella 0.94/ tibia 1.34/ metatarsus 1.16/ tarsus 0.96/ total 5.86; II: 1.20/ 0.68/ 0.90/ 0.86/ 0.68/ total 4.32; III: 1.04/ 0.64/ 0.84/ 1.06/ 0.66/ 4.24; IV: 1.56/ 0.80/ 1.48/ 1.52/ 0.90/ 6.26; Leg formula 4123; Spination: see Raven (1981). Tibia I: P1 a conical and strong spur, P2 with a strong spine with slightly projected base below P1 and P3, and P3 two spines sharing the same projected base. Metatarsus I with flattened basal spine and basal depression associated with prolateral processes of tibia I ( Figs 13F , 29E ). Palpal tibia twice length of cymbium, with row of elongated ventral and dorsal setae. Cymbium as long as wide with four apical spines and one on prolateral lobe. Bulb piriform with elongated tegulum, short embolus, half length of tegulum and apically tapering ( Fig. 13B–C ). PLS: basal, medial and apical, 0.72 0.62, 0.62 long.

Female (Paratype). Color: Carapace in dorsal and ventral views and legs yellowish brown, abdomen light brown. Total length 6.06. Carapace 2.76 long, 2.06 wide. Abdomen 3.30 long. Fovea 0.20. Clypeus 0.03. Ocular tubercle 0.29 long, 0.37 wide. Eyes: eight, posterior row strongly recurved. AME 0.02, ALE 0.20, PME 0.08, PLE 0.14. Basal segment of chelicerae with 11 prolateral teeth and 10 smaller mesobasal teeth. Labium 0.28 long, 0.52 wide. Sternum 1.20 wide, 1.50 long. Palp: femur 1.52/ patella 0.89/ tibia 1.37/ tarsus 1.21/ total 4.99; Legs I: femur 2.22/ patella 1.27/ tibia 1.94/ metatarsus 1.75/ tarsus 1.21/ total 8.39; II: 2.00/ 1.02/ 1.37/ 1.40/ 1.02/ 6.81; III: 1.90/ 0.86/ 1.33/ 1.52/ 0.98/ 6.59; IV: 2.35/ 1.40/ 1.94/ 2.03/ 1.17/ 8.89. Leg formula 4123. Spination: see Raven (1981). Palpal claw with 17 teeth. Spermathecae, the ectal lobe conical, high, with large and interspaced glands, and small glandular area. Ental lobe short, globose, with short duct connected to ectal lobe ( Fig. 13D–E ). PLS: basal, medial and apical, 0.98, 0.79, 0.83 long.

Distribution. Colombia, Magdalena, Sierra Nevada de Santa Marta ( Fig. 33 ).

Figures

FIGURE 13. Masteria colombiensis Raven, 1981. (male and female, Sierra Nevada de Santa Marta, San Pedro, Magdalena, Colombia, AMNH). A Male eyes, dorsal view; B Left palpal bulb, retrolateral view, embolus tip curvature; C Left palpal bulb, prolateral view; D, E Female genitalia, dorsal view; F Prolateral processes of tibia I (right leg, prolateral view). Abbreviations: BS, basal spine; P1, Process 1; P2, Process 2; P3, Process 3. Scale bar: A, B, C 0.1mm; D, E 100µm; F 0.1mm.

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 33. Distribution map of Masteria species.