Arachnomura querandi,

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: 306-308

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Arachnomura querandi

sp. nov.

Arachnomura querandi  sp. nov.

Figs 8AView FIGURE 8, 9DView FIGURE 9, 10‒11View FIGURE 10View FIGURE 11

Note. This species was named “ Arachnomura cf. hieroglyphica  ” in Ruiz & Maddison (2015).

Type material. Male holotype (UBC-SEM) from Reserva Natural Otamendi [34.224719°S, 58.896527°W], Provincia de Buenos Aires, Argentina, 28.XI.2001, G.B. Edwards & C.L. Scioscia leg. (voucher Amycoida d459); female paratype (UBC-SEM) with same collection data as the holotype.

Etymology. The specific name, a noun in apposition, is in honor of the Querandi people, who lived near the type locality.

Diagnosis. Males of Ar. querandi  sp. nov. differ from those of Ar. hieroglyphica  in having a longer embolus, 2025° (5T+225°) long in Ar. hieroglyphica  (see Galiano 1977a: fig. 18) vs 2160° (6T) in Ar. querandi  sp. nov. ( Fig. 11AView FIGURE 11). Also, the RvTA in Ar. hieroglyphica  is rounded (see Galiano 1977a: fig. 19). while in Ar. querandi  sp. nov. it is slightly bilobed ( Figs 11B ‒11CView FIGURE 11).

Description. Male (holotype). Total length: 3.69. Carapace 1.80 long, 1.15 wide, 0.69 high. Ocular quadrangle 0.92 long. Anterior eye row 1.00 wide and posterior 1.04 wide. Chelicera paturon with one tricuspid promarginal tooth, and one bicuspid retromarginal tooth and spine-like setae on the frontal surface in and spine-like setae on the dorsal surface in scattered pattern ( Fig. 8AView FIGURE 8). Length of femur (both legs I lost): II 0.77, III 0.75, IV 0.98; patella + tibia: II 0.92, III 0.81, IV 1.13; metatarsus + tarsus: II 0.73, III 0.81, IV 1.04. Expected leg formula (based on closely related Ar. hieroglyphica  ): 1423. Leg spination: femur II d1-1-1, p0, r0; III d0-1-1, p0, r0; IV d1- 1-1, p0, r0; patella II ‒IV 0; tibia II p0, r0, v0-1r-1r; III 0; IV p0, r0, v1 pdi; metatarsus II v2-2; III p2di, r1di, v1 pdi; IV p2di, r1di, v1 pdi. Palp ( Figs 11A ‒11CView FIGURE 11): tibia wider than long, RvTA finger-like with slightly bilobed tip ( Figs 11B ‒11CView FIGURE 11), RTA wider than long and curved ( Fig. 11CView FIGURE 11); embolus longer than wide, fixed to the tegulum, arising retrolaterally, with a path of 2160° before coiling to retrolateral side of the cymbium, where the tip of the embolus rests ( Figs 11A ‒11CView FIGURE 11). Color in alcohol: carapace light brown, with white scales directed forward ( Fig. 10AView FIGURE 10), abdomen brown with white chevrons, sides white ( Figs 10B, 10D, 10FView FIGURE 10). Chelicera, labium and sternum brown, endites light brown ( Fig. 9DView FIGURE 9). Leg II ‒III light brown; leg IV with darker spots on both sides of tibial and metatarsal tip, the remaining segments as leg II ‒III ( Figs 10A, 10C, 10EView FIGURE 10). Anterior spinnerets brown, posterior yellow ( Fig. 10FView FIGURE 10).

Female. Total length: 4.08. Carapace 1.63 long, 1.01 wide, 0.67 high. Ocular quadrangle 0.86 long. Anterior and posterior eye row 0.96 wide. Chelicera paturon with one tricuspid promarginal tooth and one bicuspid retromarginal tooth. Length of femur: I 0.82, II 0.62 III 0.67, IV 0.89; patella + tibia: I 1.01, II 0.74, III 0.72, IV 1.03; metatarsus + tarsus: I 0.77, II 0.62, III 0.72, IV 0.94. Leg formula: 4132. Leg spination: femur I ‒III d0-1-1 p0, r0, IV d1-1-1, p0, r0; patella I ‒IV 0; tibia I p0, r0, v2 *-2a-1p; II p0, r0, v1 r-1r-0; III ‒IV 0; metatarsus I v2-2; II v1 r-1p (v1 r-2 right); III p2di, r1di, v1 pdi; IV p2di, r1di, v1 pdi. Epigyne ( Figs 11D ‒11EView FIGURE 11): posterior edge unilobed, copulatory openings anteriorly placed. Color in alcohol: carapace and abdomen as in male, venter of the abdomen lighter. Legs as in male, but lighter ( Figs 10G ‒ 10IView FIGURE 10).

Distribution. Only known from Reserva Natural Otamendi, Argentina.