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

Eutichurus luisdiazi sp. nov.

Figs 1 View FIGURE 1 , 10 View FIGURE 10 , 11 View FIGURE 11 , 29E View FIGURE 29 , 30E View FIGURE 30 , 32–34 View FIGURE 32 View FIGURE 33 View FIGURE 34

Type material. Holotype: COLOMBIA, Guajira: 1♂, Barrancas, San Pedro del Alto, Camino a la Cueva ( 10°52′28.16″N; 72°44′1.64″W), 1716 m, 4.XII.2016, M. Gutiérrez leg. (MPUJ_ENT0087171). Paratypes: COLOMBIA, Guajira: 2♀, same date as holotype (MPUJ_ENT0087170, UARC:AR200); 2♂, same date as holotype (MPUJ_ENT0087169, UARC:AR201); 2♂, Barrancas, San Pedro del Alto, Camino a la Cueva, Finca La Alemania ( 10°50′14.4″N; 72°40′14.9″W), 1749 m, 20.XI.2019, M. Gutiérrez leg. (MPUJ_ENT0087168, UARC:AR202); 1♂, Barrancas, Vereda Las Pavas, Camino Cueva Jaguar ( 10°50’01.1”N 72°40’28.1”W), 1671 m, 13.XI.2024, Manual capture, C. Casas, L. Martínez, M. Machado, M. Gutierrez, C. Osorio, E. Villarreal, L. Munar, Y. Murillo, L. Avendaño & N. Aroca leg. (UARC:AR311); 1♂, 1J, Barrancas, Vereda Las Pavas, Finca La Fortuna ( 10°50’25.5”N 72°40’24.3”W), 1539 m, 13.XI.2024, Manual capture, C. Casas, L. Martínez, M. Machado, M. Gutierrez, C. Osorio, E. Villarreal, L. Munar, Y. Murillo, L. Avendaño & N. Aroca leg. (UARC:AR296)

Etymology. The specific name is after Luis Diaz, a young Colombian football player born at the type locality, municipality of Barrancas, and a pride for Colombia and specially his hometown for his professional career and the many social contribution through his foundation “Sembrando Esperanza” which focuses on improving the life quality of Barrancas and nearby populations. Masculine genitive epithet.

Diagnosis. Males of Eutichurus luisdiazi sp. nov. resemble to those of Eutichurus marquesae Bonaldo, 1994 by the long retrolateral tibial apophysis and large median apophysis, but differ by the very wide prolateral process of the embolus, retrolateral tibial apophysis straight with ventral tip less projected (very thin prolateral process of the embolus and wide retrolateral tibial apophysis with the ventral tip projected in E. marquesae ( Bonaldo et al. 2018: 335, figs 27, 30; Figs 10A–C View FIGURE 10 , 11A–D View FIGURE 11 ). Females are similar to those of Eutichurus marquesae by the anterior projections projected laterally in relation to posterior plates and the posterior plate much longer than wide ( Bonaldo 1994: 154, fig 80; Figs 10E View FIGURE 10 , 11E View FIGURE 11 ). They can be distinguished by the subtriangular posterior plate (bottle-like in E. marquesae ), longer and thinner secondary spermathecae stalk, and smaller secondary spermathecae ( Bonaldo 1994: 154, figs 80–81; Figs 10D–E View FIGURE 10 , 11E–F View FIGURE 11 ).

Description. Male holotype ( MPUJ_ENT0087171). Coloration in ethanol: carapace light-brown, darker on cephalic and ocular region with thin thoracic groove mark reddish brown. Chelicerae with the paturon dark brown and reddish-brown fangs with four promarginal and retromarginal teeth. Endites and labium dark brown. Sternum light brown. Legs: coxae I–IV yellow. Femora and patellae, I–IV light brown.Tibiae-tarsi, II–IV brown. Opisthosoma pale yellow, dorsally covered with fine white setae, ventrally with black setae rounded the tracheal spiracles and lungs opening. Spinnerets pale-yellow. Tarsi I–IV with dense scopulae, and metatarsi III–IV with scarce scopulae. Measurements: total length 15.07, carapace length 6.89, width 5.12, height 1.81. Clypeus height 0.22. Eye diameters and interdistances: AME 0.41, ALE 0.40, PME 0.29, PLE 0.34; AME–AME 1.16, AME–ALE 1.26, AME–PME 0.85, PME–PME 1.25, PME–PLE 1.19, ALE–PLE 0.76. Chelicerae length 3.64. Sternum length 3.01, width 2.18. Legs: I—femur 5.87/ patella 2.12/ tibia 6.99/ metatarsus 5.18/ tarsus 2.65/ total 22.81; II—5.12/ 1.47/ 4.69/ 3.18/ 1.99/ 16.45; III—4.64/ 2.78/ 6.34/ 7.13/ 2.61/ 23.50; IV—5.57/ 2.13/ 5.86/ 5.16/ 2.52/ 16.08. Opisthosoma length 8.11. Legs and palp macrosetae pattern: palpal femur d 0-0-1, tibia p 1-0-1. I—femur d 1-0-0, p 0-1d-1d; tibia v 2-1r-1p-2 (2-3-2-1p); metatarsus v 2-0-2-1r (2r1-1p-1p). II—femur d 1-1-0, p 0-1d-1d; tibia v 2-2-1p; metatarsus v 2-1p- 1p. III—femur d 1-1-1, r 1d-1d-1d, p 0-1d-1d; tibia v 1p-2-2, p 1-1, r 1-1; metatarsus v 2-2-1p, d p1r1-p1r1- p1r1, p 0-0-1, r 0-0-1; IV—femur d=II, p=III, r 0-0-1d; tibia v 2-2-2, p 0-1, r=III; metatarsus=III. Palp: cymbium almost as long as tibia length; retrolateral process of the cymbium wide with the external edge sub-rounded; tegulum sub-rounded, almost as wide as long; conductor hyaline and thin; embolus long and flattened, inserted medially on the tegulum, with a wide process; spermatic ducts wide and S-shaped in ventral view; median apophysis large and bifid with long tips, median prong with apex rounded and sharp; retrolateral tibial apophysis large and thin with two apical processes, being the ventral longer than the dorsal ( Figs 10A–C View FIGURE 10 , 11A–D View FIGURE 11 ).

Female ( MPUJ_ENT0087170). Coloration in ethanol:carapace light-brown darker on cephalic and ocular region with thin thoracic groove mark reddish-brown. Chelicerae with the paturon dark-brown and reddish-brown fangs with four promarginal and retromarginal teeth. Endites and labium dark brown. Sternum light brown. Legs: coxae I–IV yellow. Femora and patellae, I–IV light brown. Tibiae-tarsi, II –IV brown. Opisthosoma: pale yellow, dorsally covered with fine white setae, ventrally with black setae rounded the tracheal spiracles and lungs opening. Spinnerets pale-yellow. Tarsi I –IV with dense scopulae, and metatarsi III–IV with moderate scopulae. Measurements: total length 15.60, carapace length 8.04, width 5.91, height 2.18. Clypeus height 0.25. Eye diameters and interdistances: AME 0.38, ALE 0.39, PME 0.26, PLE 0.26; AME – AME 1.22 , AME – ALE 1.31 , AME – PME 1.17 , PME – PME 1.41 , PME – PLE 1.59 , ALE – PLE 0.83. Chelicerae length 4.10. Sternum length 3.21, width 2.87. Legs: I—femur 6.28/ patella 3.16/ tibia 6.40/ metatarsus 6.57/ tarsus 2.42/ total 24.83; II—5.87/ 3.15/ 6.13/ 6.21/ 2.53/ 23.89; III—4.50/ 2.36/ 3.84/ 4.45/ 2.30/ 17.45; IV—6.52/ 2.72/ 6.29/ 6.57/ 2.27/ 24.37. Opisthosoma length 7.50. Legs and palp macrosetae pattern: palpal femur d 0-0-1, tibia p 1-0-1. I—femur d 1-0-0, p 0-1d-1d; tibia v 2-1r-1p-2 (2-3-2-1p); metatarsus v 2-0-2-1r (2r1-1p-1p). II—femur d 1-1-0, p 0-1d-1d; tibia v 2-2-1p; metatarsus v 2-1p- 1p. III—femur d 1-1-1, p 0-1d-1d, r 1d-1d-1d; tibia v 1p-2-2, p 1-1, r 1-1; metatarsus v 2-2-1p, d p1r1-p1r1-p1r1, p 0-0-1, r 0- 0-1; IV—femur d=II, p=III, r 0-0-1d; tibia v 2-2-2, p 0-1, r=III; metatarsus=III. Epigynum: median field longer than wide, thinner towards the posterior side; anterior projections wide, subtriangular, apically rounded; posterior plates large, separated medially, and with a short basal groove, forming a triangle; primary spermathecae large and rounded; secondary spermathecae smaller than primary ones and rounded; stalk of secondary spermathecae long, wider towards the primary spermathecae; fertilization ducts short, nearly half the length of spermathecae diameter, anteriorly inserted on the primary spermathecae ( Figs 10D–E View FIGURE 10 , 11E–F View FIGURE 11 ) .

Distribution. Known from Guajira department ( Figs 32–34 View FIGURE 32 View FIGURE 33 View FIGURE 34 ).