Eutichurus muisca, Casas & Villarreal-Blanco & Morales & Osorio & Martínez, 2025

Eutichurus muisca sp. nov.

Figs 8 View FIGURE 8 , 9 View FIGURE 9 , 29G View FIGURE 29 , 30G View FIGURE 30 , 32–34 View FIGURE 32 View FIGURE 33 View FIGURE 34

Type material. Holotype: COLOMBIA, Boyacá: 1♂, Santuario de Fauna y Flora Iguaque , Municipio Chízina. Finca Sorcido ( 5°36’N; 73°30’W), 2466 m, 2–22.IX.2003, P. Reina leg. (IAvH-I-3129). GoogleMaps

Etymology. The specific name honors the indigenous community of the Muiscas, who inhabited several departments of the center of the country, including the department of Boyacá where this species is known to occur; noun in apposition.

Diagnosis. Males of Eutichurus muisca sp. nov. are similar to E. madre Bonaldo, 1998 , E. nancyae Bonaldo & Saturnino, 2018 and E. tequendama Bonaldo & Lise, 2018 by having an embolar prolateral process and RTA represented by a single branch ( Bonaldo et al. 2018: 333, figs 23–26; 343, figs 58–60; 332, figs 20–22; Figs 8A–C View FIGURE 8 , 9A–C View FIGURE 9 ). However, they can be distinguished by a much more conspicuous, laminar, subtriangular prolateral embolar process directed prodistally ( Figs 8A–B View FIGURE 8 , 9A–B View FIGURE 9 ) They also resemble E. tropicus (L. Koch, 1866) by having an excavated RTA and a median apophysis with the apMA and aMA of almost the same length, similarly, projected towards the basal and distal sides of the cymbium, respectively ( Bonaldo 1994: 150, figs 43– 45; Figs 9B–C View FIGURE 9 , 10B– C View FIGURE 10 ). However, they can be differentiated by having a narrower apMA without a keel (wider, almost square, and with a longitudinal medial keel in E. tropicus ), a wider aMA (narrow and sharp in E. tropicus ), and an RTA perpendicular to the tibia (almost perpendicular to the tibia in E. tropicus . ( Bonaldo 1994: 150, figs 43–45; Fig. 7A–C View FIGURE 7 ). Also, by the non-filiform embolus with a subdistally located lamellar prolateral process (filiform and with a medial lamellar prolateral process in E. tropicus . Bonaldo 1994: 150, figs 43– 45; Fig. 7A–C View FIGURE 7 ).

Description. Male holotype (IAvH-I-3129). Carapace ochre, reddish-brown in the cephalic region. Chelicerae with reddish-brown paturon and fang, with three promarginal and four retromarginal teeth. Endites brown, paler anteriorly, labium brown. Sternum pale brown. Legs: Coxae I-IV pale brown. Femora and patellae I-IV pale brown. Tibiae and tarsi II-IV brown. Opisthosoma: Light gray. Spinnerets light gray. Metatarsus I-IV with poorly developed scopulae. Tarsi I-IV with dense scopulae. Measurements: total length 12.99, carapace length 5.09, width 5.22, height 2.52. Clypeus height 0.38. Eye diameters and interdistances: AME 0.33, ALE 0.27, PME 0.31, PLE 0.31; AME–AME 1.07,AME–ALE 1.10, AME–PME 0.96, PME–PME 1.08, PME–PLE 1.23,ALE–PLE 0.70. Chelicerae length 4.25. Sternum length 3.14, width 2.50. Legs: I—femur 5.77/ patella 2.71/ tibia 5.83/ metatarsus 5.74/ tarsus absent/ total 20.05; II—5.82/ 2.70/ 5.65/ 5.79/ 2.34/ 22.30; III—4.91/ 2.72/ 4.24/ 4.41/ 1.84/ 18.12; IV—6.72/ 2.08/ 5.18/ 6.07/ 2.16/22.21. Opisthosoma length 6.43. Legs and palp macrosetae pattern: palpal femur d 0-1-1, tibia p 1-0-1. I—femur d 1-0-1, p 0-0-1d; tibia v 0-2-0; metatarsus v 2-2-1. II=I, except femur d 0-1-1. III—femur d 1-0-1, p 0-0-1, r 0-1d-0; tibia v=I, p 1-0-1, r 0-0-1; metatarsus v 2-2-1, p 1d-1d-2, r 1d-1d-2. IV—femur d 1-1-0,

p0-0-1d, p0-0-1d; tibia=III; metatarsus=III. Palp: cymbium longer than length of tibia; with sub-basal retrolateral process slightly projecting toward RTA; tegulum oval, longer than wide, conductor hyaline, petal-shaped, embolus prominent, inserted submedially on prolateral side of tegulum, hourglass-shaped (prolateral view), embolar prolateral process very conspicuous and laminar; spermatic ducts broad, running marginally along tegulum, J-shaped; median apophysis bifid, anvil-shaped (retrolateral view) and with rounded apex; retrolateral tibial apophysis broad, spoonshaped (ventral view), with a small process projecting ventrally toward tegulum ( Figs 8A–C View FIGURE 8 , 9A–C View FIGURE 9 ). Distribution. Only known from the type locality in Boyacá department ( Figs 32–34 View FIGURE 32 View FIGURE 33 View FIGURE 34 ).