Eutichurus arnoi Bonaldo, 1994

Eutichurus arnoi Bonaldo, 1994 View in CoL

Figs 2 View FIGURE 2 , 3 View FIGURE 3 , 29A View FIGURE 29 , 30A View FIGURE 30 , 32–33 View FIGURE 32 View FIGURE 33 , 35 View FIGURE 35

Eutichurus arnoi Bonaldo, 1994: 122 View in CoL , fig. 53. Female holotype from Colombia, Magdalena, San Pedro, Sierra Nevada de Santa Marta , XII.1974 - I.1975, C.W.D. Gibson & R.J. Robins leg. (MCZ H5113); not examined.

Diagnosis. Males of Eutichurus arnoi Bonaldo, 1994 are similar to those of Eutichurus valderramai Bonaldo, 1994 by having a filiform and thin embolus without modification at the base and a large median apophysis, but they can be separated from this species by the shape of the retrolateral tibial apophysis, which is longer, apically pointed, with an anterior rounded projection, and ventrally projected (shorter, concave, and provided with a small projection along the full extension of its apical edge in E. valderramai ; ( Bonaldo 1994: 151, figs 48–49; Figs 2A–C View FIGURE 2 , 3A–D View FIGURE 3 ). Females are similar to those of Eutichurus lizeri Bonaldo, 1994 , Eutichurus yungas Bonaldo, 1994 , E. murgai Bonaldo & Lise, 2018 , Eutichurus valderramai Bonaldo, 1994 , and Eutichurus saylapampa Bonaldo,1994 , by having highly developed anterior projection, not exceeding the posterior plates ( Bonaldo 1994: 150, figs. 41–42; Bonaldo et al. 2018: 351, figs. 18–19; 327, figs. 7–8; Bonaldo 1994: 151, figs. 50–51; 151, fig. 52; Fig. 2D–E View FIGURE 2 ). However, they can be distinguished from E. lizeri and E. yungas by their unfused posterior plate ( Bonaldo 1994: 150, figs. 41–42; Bonaldo et al. 2018: 351; Bonaldo 1994: 151, fig. 53; Fig. 2D–E View FIGURE 2 ); from E. murgai plate by their smooth anterior projection (distally sclerotized in E. murgai and E. valderramai ) ( Bonaldo et al. 2018: 327, figs. 7–8; Bonaldo 1994: 151, figs. 50–51; Fig. 2D–E View FIGURE 2 ); and from E. saylapampa and the aforementioned species, as well as from the rest of the genus, by having rounded posterior plates, as long as wide, and a prominent subtriangular atrium between the projection anterior ( Bonaldo 1994: 151, fig. 52; 151, 53; Fig. 2D–E View FIGURE 2 ).

Description. Male (UARC:AR199). Coloration in ethanol: carapace dark brown on cephalic and ocular region with a thin and reddish-brown stripe on thoracic groove. Chelicerae with the paturon dark-brown, brown-reddish fangs. Endites and labium dark brown. Sternum light brown. Legs: coxae I–IV light brown. Femora and patellae I–IV light-brown-yellow; tibiae/tarsi II–IV brown. Opisthosoma: light gray, dorsally covered with fine white setae, ventrally with black setae around the tracheal spiracles and lung openings. Spinnerets light gray. Femora/tibiae I–IV with less developed scopulae. Tarsi I–IV with dense scopulae, and metatarsi III–IV with moderate scopulae. Measurements: total length 20.89, carapace length 9.44, width 7.22, height 4.05. Clypeus height 0.34. Eye diameters and interdistances: AME 0.56, ALE 0.59, PME 0.38, PLE 0.52; AME–AME 1.50, AME–ALE 1.43, AME–PME 1.04, PME–PME 1.42, PME–PLE 1.70, ALE–PLE 1.12. Chelicerae length 5.38, with four promarginal and three retromarginal teeth. Sternum length 4.14, width 3.62. Legs: I—femur 8.37/ patella 3.41/ tibia 7.79/ metatarsus 9.35/ tarsus 3.53/ total 32.45; II—8.13/ 3.53/ 8.26/ 9.22/ 3.39/ 32.53; III—7.30/ 2.69/ 6.36/ 6.97/ 2.94/ 26.26; IV—8.95/ 3.51/ 8.01/ 9.53/ 3.01/ 33.01. Opisthosoma length 11.43. Legs and palp macrosetae pattern: palpal femur d 0-0-1, tibia p 1-0-1. I—femur d 1-0-1, p 0-0-1d; tibia v 2-(1)-2-1p; metatarsus v 2-1r- 1p. II—femur=I; tibia v 2-2-0, p 0-0-1d; metatarsus v 2-2- 1p. III—femur d 1-1-1r, p 0-1d-1d, r 0-0-1d; tibia v 1p-2-2, p 1-1, r 1-1; metatarsus v 2-1p-1p, d p1r1-p1r1-p1r1, p 0-0-1, r 0-0-1; IV=III. Palp: retrolateral tibial apophysis short, with a laminar small process; cymbium, long, nearly twice the length of the tibia; retrolateral process lightly projected; tegulum sub-rounded, longer than wide; hyaline conductor very thin; embolus long and filiform, inserted sub-basally on the tegulum, without process; spermatic ducts wide and n-shaped in ventral view; large and bifid median apophysis with sharpened and long apex, median prong with long and flattened apex ( Figs 2A–C View FIGURE 2 , 3A–D View FIGURE 3 ).

Female. See description and illustrations in Bonaldo (1994): 122, 151, fig. 53. Additional documentation in Fig. 2D–E View FIGURE 2 .

New Records. COLOMBIA, Magdalena: 1♂, Parque Nacional Natural Sierra Nevada de Santa Marta, Ciénaga ( 10°53′27.3″N; 73°59′43.9″W), 2100m, 11.VI.2001, P. Sánchez leg. (MPUJ_ENT0087173); 2♂, Santa Marta, Sierra Nevada de Santa Marta, Onaca, Camino Cerro Kennedy ( 11°6′18″N; 74°3′46″W), 2388m, 15.XII.2022, Manual Capture, L. Martínez Leg. (UARC:AR199); 1♀, Sierra Nevada de Santa Marta, Hacienda Hierba Buena ( 10°53′42.3″N; 73°59′58.6″W), 2600m, 10.XI.2015, Manual Capture, L. Martínez Leg (UARC:AR205); 1♂, Sierra Nevada de Santa Marta, Hacienda Hierba Buena ( 10°53′36.49″N; 73°59′45.81″W), 2600m, 12.XI.2024, Manual Capture, L. Benavides, C. Casas. W. Galvis, C.V. Mamani, L. Martinez, M.P. Pereira, W. Porto, D. Proud (MPUJ_ ENT0087172).

Distribution. Only known from Magdalena department ( Figs 32 View FIGURE 32 , 33 View FIGURE 33 , 35 View FIGURE 35 ).