Kalcerrytus amplexus, Bustamante, Abel A. & Ruiz, Gustavo R. S., 2016

Bustamante, Abel A. & Ruiz, Gustavo R. S., 2016, Three new species of Kalcerrytus Galiano, 2000 from Brazil (Araneae: Salticidae), Zootaxa 4066 (1), pp. 41-51 : 42-45

Kalcerrytus amplexus sp. nov.

Figs 1–11

Type material. Male holotype ( MPEG 21149) and female paratype ( MPEG 21148) from Parque Nacional da Serra do Pardo, São Félix do Xingu, Pará, Brazil (5.877806°S, 52.795389°W), 26.IV.2012, G.R.S. Ruiz et al.

Etymology. The epithet is a Latin noun meaning “hug” and refers to the shape of the RTA, which resembles an open arm.

Diagnosis. The males of Kalcerrytus amplexus sp. nov. differ from all others by having the tip of RTA with two branches ( Figs 4–5 , 8 ). The females are similar to those of K. merreti by the posteriorly projected border of the epigynal plate, but can be distinguished by having the terminal portion of the spermathecae fused over a sclerotized internal plate (apparently also present in K. odontophorus Ruiz & Brescovit, 2003 , though small), from which the fertilization ducts emerge ( Fig. 10 ), while in K. merreti the spermathecae are completely separated (see Galiano 2000: figs 58–59).

Description. Male (holotype, MPEG 21149). Total length: 5.99. Carapace 3.38 long, 2.30 wide, 1.69 high. Ocular quadrangle 1.77 long. Anterior eye row 2.30 wide and posterior 2.07 wide. Chelicera with two promarginal teeth and one retromarginal tooth, as described for the genus. Length of femur: I 1.94, II 1.82, III 2.38, IV 2.04; patella + tibia: I 2.38, II 2.06, III 2.28, IV 2.18; metatarsus + tarsus: I 1.75, II 1.66, III 2.26, IV 2.33. Leg formula: 3412. Leg spination: femur I d1-1-1, p2di; II d1-1-1, p2di; III d1-1-1, p0-1-1; IV d1-1-1, r1; patella I p1, r1; II p1, r1; III p1, r1; IV p1, r1; tibia I d0, p1-1-1, r0, v2-1 -2; II d0, p1-1-1, r1-0-0, v2-2 -2; III d0, p1-1-1, r1-1-1, v1 -0-2; IV d0, p1-1-1, r1-1-1, v1 -0-2; metatarsus I v2-2; II v2-2 III d0-1-2, p1-0-1, r1-2-1, v2 -0-2; IV d1r-1p-2di, p1-0-1, r1- 0-1, v1 -0-2. Palp ( Figs 3–5 , 7–8 ): femur with a blunt distal proventral tubercle; RTA longer than wide with a tubercle at the base and an expanded bifurcated tip with denticles on the internal face of proximal branch; embolic base with no spicules. Color in alcohol: carapace and abdomen as in the genus (see Galiano 2000; Edwards 2015), with a pair of stripes of white scales extending from under PME to the posterior portion of carapace ( Fig. 1 ). Femur, patella and tibia I brown (median tibia lighter), metatarsus and tarsus lighter; proximal femur II yellow, distal brown, patella and tibia II brown (median tibia lighter), metatarsus and tarsus lighter; leg III yellow; leg IV yellow with brown pattern, lighter than I and II ( Fig. 1 ).

Female (paratype, MPEG 21148). Total length: 7.87. Carapace 3.74 long, 2.59 wide, 1.92 high. Ocular quadrangle 1.82 long. Anterior eye row 2.40 wide and posterior 2.21 wide. Chelicera as in male. Length of femur: I 1.92, II 1.74, III 2.58, IV 2.19; patella + tibia: I 2.49, II 2.28, III 2.43, IV 2.40; metatarsus + tarsus: I 1.74, II 1.56, III 2.40, IV 2.55. Leg formula: 3412. Leg spination: femur I d1-1-1, p2di; II d1-1-1, p2di, r0-1-1; III d1-1-1, p0-1- 2, r2di; IV d1-1-1, p0, r1; patella I 0; II p1, r1; III p1, r1; IV p1, r1; tibia I d0, p1-1-1, r0, v2-1 -2; II d2di, p1-1-1, r0, v2-1 -2; III d0, p1-1-1, r1-1-1, v1 -0-2; IV d0, p1-1-1, r1-1-1, v1 -0-2; metatarsus I v2-2; II v2-2; III d2di, p1-1-1, r1- 0-1, v2 -0-2; IV d2-0-2, p1-1-1, r1-0-1, v2 -0-2. Epigyne ( Figs 6 , 9–11 ): posterior edge with one lobe, copulatory openings anteriorly placed, U-shaped. Color in alcohol: carapace and abdomen as in the genus (see Galiano 2000; Edwards 2015), all legs are light brown ( Fig. 2 ).

Distribution. Known only from the type locality.

Natural history. All specimens were collected on the ground.

Figures

FIGURES 1 – 2. Kalcerrytus amplexus sp. nov. 1 male holotype (MPEG 21149), dorsal; 2 female paratype (MPEG 21148), dorsal.

FIGURES 3 – 6. Kalcerrytus amplexus sp. nov. 3 male left palp (holotype, MPEG 21149), ventral view; 4 same, retrolateral view; 5 same, detail of RTA; 6 epigyne (paratype, MPEG 21148), ventral view.

FIGURES 7 – 11. Kalcerrytus amplexus sp. nov. 7 male (holotype, MPEG 21149) left palp, ventral view; 8 same, retrolateral view; 9 epigyne (paratype, MPEG 21148), ventral view; 10 same, cleared, dorsal view; 11 same, cleared, ventral view. AP = accessory pocket; CD = copulatory duct; CO = copulatory opening; DPT = distal prolateral tubercle; E = embolus; FD = fertilization duct; ip = internal plate (epigyne); RTA = retrolateral tibial apophysis; S = spermatheca; T = tegulum.