Titanattus acanjuba,

Bustamante, Abel A. & Ruiz, Gustavo R. S., 2017, Systematics of Thiodinini (Araneae: Salticidae: Salticinae), with description of a new genus and twelve new species, Zootaxa 4362 (3), pp. 301-347: 339-340

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Titanattus acanjuba

sp. nov.

Titanattus acanjuba  sp. nov.

Figs 4View FIGURE 4, 6‒7View FIGURE 6View FIGURE 7, 8KView FIGURE 8, 9AView FIGURE 9, 28‒29View FIGURE 28View FIGURE 29

Note. This species is mentioned as “ Titanattus  sp. D” in Ruiz & Maddison (2015).

Type material. Male holotype ( IBSP 21590View Materials) from Passo do Lontra [19.57°S, 57.03°W], Corumbá, Mato Grosso do Sul, Brazil, IV. 1998, JGoogleMaps  . Raizer et al. leg. One female paratype ( IBSP 86162View Materials) with same data as holotype but Subregiões Miranda e Abobral , VI.1998GoogleMaps  ‒ XI.1999.

Additional material examined. BRAZIL: Pará: Algodoal: 1♀; Juruti: Várzea Piranha (02°12'36.1"S, 56°07'20.7"W) 1♀ ( MPEG 30604View Materials), 20.XII.2012, EGoogleMaps  . L.S. Costa; Piauí: Brasileira e Piracuruca, Parque Nacional de Sete Cidades : 1♂ ( MPEG 30605View Materials), (04°05'56.3"S, 41º05'56.3"W), 12.XII.2006, DGoogleMaps  . F. Candiani ; 1♀, 1j ( MPEG 30606View Materials), (04°05'57.5"S, 41°43'00.7"W), 25.VI.2007, FGoogleMaps  . N. Oliveira-Marques; Teresina: Zoológico: 1♂ ( MPEG 30607View Materials), 09.VII.2005, L.S. Carvalho; Mato Grosso do Sul: Corumbá: Passo do Lontra   : 1♂, 1j (IBSP 21598), 1♀ (IBSP 21838), 1♂ ( IBSP 21860View Materials); Subregiões Miranda e Abobral  : 1♀ (IBSP 86148); 1♀ (IBSP 86149), 1♀ (IBSP 86150), 1♀ (IBSP 86151), 1♀ (IBSP 86152), 1♀ (IBSP 86153), 1♀ (IBSP 86154), 1♀ (IBSP 86155), 1♀ (IBSP 86156), 1♀ (IBSP 86157), 1♀ (IBSP 86158), 1♀ (IBSP 86159), 1♂ (IBSP 86160), 1♂ (IBSP 86161), 1♂ (IBSP 86163), 1♂ (IBSP 86164), 1♀ (IBSP 86167), 1♀ (IBSP 86168), 1♀ (IBSP 86170), 2♀ (IBSP 86171), 1♀ (IBSP 86172), 1♂ (IBSP 86173), 1♀ (IBSP 86214) VI.1998 ‒ XI.1999, J. Raizer et al.; São Paulo: São Paulo: Jardim Bomfiglioli  : 1♀ (IBSP), 20.VII.1999, R.P. Indicatti.

Etymology. The specific name (in apposition) is a combination of the Tupi words acanga (head) and îuba (yellow), in reference to the common name in Portuguese “cabeça-de-manteiga” (=butter-head) used by the authors to refer to this species (due to the guanine crystals seen through the translucent cephalic region).

Diagnosis. The males differ from those of the other species of the genus by the shape of the embolus, which starts ribbon-like ( Figs 7A ‒7BView FIGURE 7, 29AView FIGURE 29) and end with a long whip-like tip ( Fig. 29BView FIGURE 29). The females can be distinguished by the thin median septum in the epigyne ( Fig. 29DView FIGURE 29).

Description. Male (holotype). Total length: 3.30. Carapace 1.57 long, 1.15 wide, 0.92 high. Ocular quadrangle 1.00 long. Anterior and posterior eye row 1.08 wide. Chelicera paturon with one promarginal and one retromarginal tooth, both bicuspid. Length of femur: I 0.94, II 0.79, III 0.75, IV 0.93; patella + tibia: I 1.30, II 0.99, III 0.85, IV 1.08; metatarsus + tarsus: I 0.91, II 0.81, III 0.87, IV 1.04. Leg formula: 1423. Leg spination: femur I ‒ II d1-1-1, p1di, r0; III ‒IV d1-1-1, p1di, r1di; patella I ‒IV p1, r1; tibia I p0, r0, v2 -0-2a-2; II p0, r0, v1 r-2a-2; III p0- 1-0, r0-1-0 (r0-1-1 right), v1 pdi (v2 di right); IV p0-1-0, r0-1-0 (r1-1-1 right), v2 adi; metatarsus I ‒II v2-2; III ‒IV p2di, r2di, v2 di. Palp ( Figs 29A ‒29CView FIGURE 29): tibia wider than long, RTA triangular and hook-shaped, RvTA rounded; embolus with a membranous part with a path of 490° (1T+130°), followed by a posterior loop of the spermduct continuing ventro-retrolaterally forming a U-shaped coil and ending with the tip at the retrolateral side ( Figs 29A ‒ 29BView FIGURE 29). Color in alcohol: carapace brown with some white scales, intestinal diverticula can be seen through translucent cuticle ( Figs 28A ‒28BView FIGURE 28), abdomen white with dark dorsal markings. Legs with striped pattern ( Figs 28A ‒28CView FIGURE 28).

Female. Total length: 3.80. Carapace 1.57 long, 1.19 wide, 0.88 high. Ocular quadrangle 1.04 long. Anterior and posterior eye row 1.11 wide. Chelicera paturon with three promarginal teeth, the middle one bicuspid, and three curved retromarginal teeth. Length of femur: I 0.82, II 0.76, III 0.74, IV 0.98; patella + tibia: I 1.00, II 0.88, III 0.82, IV 1.14; metatarsus + tarsus: I 0.72, II 0.68, III 0.83, IV 1.02. Leg formula: 4132. Leg spination: femur I ‒ II d1-1-1, p1di, r0; III d1-1-1, p1di, r0 (r1di right); IV d1-1-1, p0, r0; patella I ‒II 0; III p1 (p0 right), r1; IV p0, r1; tibia I p0 (p0-0-1 right), r0, v2 a-2-2; II p0-0-1, r0, v0-2-1p; III p0-1-0, r0-1-0 (r0-0-1 right), v1 pdi; IV p0-0-1, r0-1- 1 (r0-0-1 right), v2 di; metatarsus I ‒II v2-2; III p2di, r2di, v1 pdi; IV p2di, r2di (r1di right), v1 pdi (v0 right). Epigyne ( Figs 29D ‒29EView FIGURE 29): posterior edge slightly bilobed, copulatory openings medially placed, leading to a membranous and convoluted duct followed by a sclerotized duct, ending at the spermathecae. Color in alcohol: as in male, but lighter ( Fig. 28View FIGURE 28); the dark rings on the legs are more conspicuous.

Distribution. Only known from Brazil.

Natural history. Some specimens were collected on live tree trunks and on dry vines.