Breda milvina (C.L. Koch, 1846)

Ruiz, Gustavo R. S. & Brescovit, Antonio D., 2013, Revision of Breda and proposal of a new genus (Araneae: Salticidae), Zootaxa 3664 (4), pp. 401-433 : 404-406

Breda milvina (C.L. Koch, 1846)

Figs 7–16, 18–19 , 25–29 , 39 , 101

Marpissa milvina C.L. Koch, 1846: 65 , fig. 1131 (Female holotype from Bahia, Brazil, should be deposited in ZMB, lost, not examined).

Dendryphantes milvina: Simon, 1864: 314 .

Breda milvina: Peckham & Peckham, 1894: 93 , pl. 8, fig. 7; Petrunkevitch, 1925: 228, fig. 140; Chickering, 1946: 37, figs 16– 19; Platnick, 2013.

Note. Although the holotype is lost, the species was recognized by the original description of the dorsal abdominal coloration: “Hinterleib braunschwarz, (...) Längsband weisslichgrau, (...) hinten feuerroth” [abdomen dark brown, (with a) longitudinal whitish gray stripe (and) fire-red posteriorly] (C.L. Koch 1846: 66, fig. 1131).

Material examined. MEXICO: San Luis Potosí: Tamazunchale: 1m, 6–7.VII.1941, L.I. Davis (AMNH); PANAMA: Provincia de Colón: Fort Sherman: 2j, VIII.1939, A.M. Chickering (MCZ 60444); Provincia del Panamá: Isla de Barro Colorado: 1m, VIII.1939 (MCZ 60446); 1f (MCZ 60384); 1m, 6f, 2j, VI–VIII.1936 (MCZ 60434); 1m, 1j, VIII.1950 (MCZ 60436); 9m, 4f, 12j, VI–VIII.1939 (MCZ 60437); 1m, 16.VII.1950 (MCZ 60438); 1m, 1f, 4j, VI–VII.1934 (MCZ 60439); 1m, VI.1950 (MCZ 60440); 1m, 1j (MCZ 60441); 1j, 7.V.1964 (MCZ 60443); 1m, 11–20.VII.1950 (MCZ 60447), all collected by A.M. Chickering; 1m, 1f, VI.1987, Quintero (MACN); Experimental Gardens: 1m, 11–26.VII.1954, A.M. Chickering (MCZ 60445); Summit Park: 1f, 1j, 25.II.1958 (MCZ 60435); 1m, 13.VII.1954 (MCZ 60442), all collected by A.M. Chickering; TRINIDAD Y TOBAGO: Arima Valley, Simla Research Station, 1m, 27.VI-3.VII.1978, Camilla B. & H.V. Weems (FSCA); BRAZIL: Amazonas: Manaus: 2m (SMNK 230, 231); (Fazenda Esteio) 1m, 11.III.1988, B.C. Klein (INPA 54); Bahia: Itamaraju: Fazenda Jacarandá, 1m, 9.XI.1977, J.S. Santos (MCN 11333); Espírito Santo: Linhares: Estação Ecológica de Sooretama, 1f, X.1962, A. Martínez (MACN); BOLIVIA: Cochabamba: Chapare, Chimoré: 1f, I.1972, Fritz (MACN).

Diagnosis. Breda milvina differs from the other species of the genus by the posterior half of the abdomen covered by orange scales in both sexes ( Fig. 7 ) and by having the dorsal border of the embolic depression projected ventrally in the male palp ( Fig. 11 ).

Description. Male (MCZ 60446). Total length: 10.60. Carapace length: 4.50; width: 3.12; height: 1.70. Carapace dark brown, with a broad longitudinal median stripe of long white hairs, extending from between the posterior lateral eyes and becoming narrower posteriorly, almost reaching the posterior border ( Fig. 7 ). Length of the ocular quadrangle: 2.05. Width of the anterior eye row: 2.37; posterior: 2.37. Chelicera dark brown, with four teeth on promargin and one on retromargin. Labium, sternum and endites dark brown. RvTA with distal ventral concavity and embolus tip long and slender ( Figs 10–11 , 39 ). Legs 1423, dark brown, I slightly darkest, all covered with sparse white scales. Femur I 3.30x1.10; II 2.60x0.90; III 2.55; IV 2.95. Patella I 2.10; II 1.70; III 1.30; IV 1.50. Tibia I 2.70x0.80; II 2.20x0.60; III 1.80; IV 2.80. Metatarsus I 2.00; II 1.50; III 1.75; IV 2.20. Tarsus I 1.10; II 1.00; III 0.90; IV 0.90. Leg spination: femur I d1-1-1, p1-2, r1di, v1 pdi; II d1-1-1, p1-2 (p1-1-2), r1-1, v1 pdi; III d1-1-1, p1-1-2, r1-2, v1 pdi; IV d1-1-1, p1-2 (p1-1), r1di, v0. Patella I, II, III, IV 0. Tibia I v10 ( Fig. 8 ); II v5; III p1- 1, r1-1-1, v1 r-1p-1p-2; IV p0, r1-1-1, v1 p-1-1r-1p-0-2 (v1 p-1-1p-0-2). Metatarsus I, II v2-2; III p2di, r2di, v2-2; IV p2di, r1di, v2-2. Abdomen dorsally dark brown with a longitudinal median light stripe with a light brown scutum on the anterior third surrounded by white scales ( Fig. 7 ); this stripe has two pairs of lateral extentions where white scales are inserted; posterior half covered with orange scales ( Fig. 7 ); sparse tufts of white scales laterally; ventrally light brown. Spinnerets dark brown.

Female (MCZ 60437). Total length: 13.12. Carapace length: 6.30; width: 4.40; height: 2.30. Carapace as in male. Length of ocular quadrangle: 2.55. Width of the anterior eye row: 3.10; posterior: 3.10. Chelicera as in male, with four or five teeth on promargin and one on retromargin. Labium, sternum and endites as in male. Palp light brown. Legs 4123, brown. Femur I 3.70x1.70; II 3.35x1.35; III 3.20; IV 4.00. Patella I 2.40; II 2.10; III 1.80; IV 2.15. Tibia I 2.90x1.15; II 2.75x0.90; III 2.30; IV 3.75. Metatarsus I 1.90; II 1.65; III 2.20; IV 2.90. Tarsus I 1.15; II 1.15; III 1.10; IV 1.15. Leg spination: femur I, II d1-1-1, p1-2, v0; III d1-1-1, p1-1-2, r1di; IV d1-1-1. Patella I, II, III, IV 0. Tibia I v2; II v0; III p1-1 (p1), r1-1-1, v1 p-1p-2-2 (1r-1p-1p-2); IV p0, r1 (r0), v1 p-1p-2. Metatarsus I,

Figures

FIGURE 101. Occurrence records for the species Breda milvina, B. lubomirskii, B. bicruciata and B. modesta comb. nov. Open star indicates indetermined record of B. modesta within Guyana.

FIGURES 7 – 13. Breda milvina. 7 male, dorsal view; 8 left tibia I, ventral view; 9 male abdomen, ventral view; 10 left male palp, ventral view; 11 ventroretrolateral view; 12 epigyne, ventral view; 13 dorsal view, cleared. Scale bars equal 0.5 mm, except when indicated otherwise.

FIGURES 14 – 19. Breda milvina. 14 left male palp, retrolateral view; 15 left male palp, ventral view showing sperm duct path; 16 bulb, cleared, with embolus partially removed, showing path in subtegulum; 18 left male palp, ventral view, expanded; 19 same, retroalteral view. Druzia flavostriata gen. et comb. nov. 17 bulb, cleared, with embolus removed, showing sperm duct path. Scale bars equal 0.5 mm.

FIGURES 20 – 25. B. apicalis. 20 carapace, lateral view showing lateral stripe of scales; 21 same scales, detail; 22 reduced ventral spine on tibia I; 23 ventral tuft of scales close to spinnerets. B. lubomirskii. 24 left male palp, detail of embolar depression. B. milvina. 25 left male palp, dorsal view showing vestige of dorsoretrolateral tibial apophysis.

FIGURES 26 – 29. Spinnerets of Breda milvina (male). 26 Anterior lateral spinneret, with one major ampullate spigot (MAP), one nubbin (N) and a MAP tartipore (TP) surrounded by several piriform spigots (PI). 27 Posterior lateral spinneret, with aciniform spigots (AC). 28 Posterior median spinneret (PMS) with one central minor ampullate spigot (mAP) and a central membranous area surrounded by several aciniform spigots (AC). 29 Detail of central membranous area of PMS showing one nubbin (N) and one mAP tartipore (TP).

FIGURES 36 – 41. Tip of embolus. Breda modesta: 36. B. bistriata: 37. B. lubomirskii: 38. B. milvina: 39. B. akypueruna: 40. B. tristis: 41.