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

Eutichurus yariguies sp. nov.

Figs 24 View FIGURE 24 , 32–33 View FIGURE 32 View FIGURE 33

Type material. Holotype: COLOMBIA, Santander: 1♀, Santander, Vereda Centro, Parque Nacional Natural Serranía de los Yariguíes San Vicente de Chucurí , El Llanito ( 6°50′29.69″N; 73°23′13.49″W), 13–15. X. 2015, J. A. Osorio-González leg. (MPUJ_ENT0087164). GoogleMaps

Etymology. The specific name refers to the type locality, which includes one of the Natural National Parks with higher diversity and endemism in the country; noun in apposition.

Diagnosis. Females of Eutichurus yariguies sp. nov. resemble to those of Eutichurus sigillatus Chickering, 1937 , and Eutichurus tibacuy sp. nov. by having W-shaped anterior margins on the posterior plates and large oval secondary spermathecae, which are much larger than the primary ones ( Bonaldo 1994: 155, figs. 87–88; Fig. 24 View FIGURE 24 ). They differ by having the anterior margin of the posterior plate longer and convex (shorter in Eutichurus sigillatus and Eutichurus tibacuy sp. nov.), and in having the anterior projections rounded and wider (subtriangular in E. tibacuy sp. nov., rounded in E sigillatus , but less prominent. Bonaldo 1994: 155, figs 87–88) ( Fig. 24 View FIGURE 24 ).

Description. Female holotype (MPUJ_ENT0087164). Coloration in ethanol: carapace uniformly brown darker on cephalic and ocular region with thin thoracic groove mark dark brown. Chelicerae with the paturon light brown and reddish-brown fangs with four promarginal and four retromarginal teeth. Endites and labium dark brown. Sternum brown. Legs: I–IV light brown. Opisthosoma: cream, dorsally and ventrally covered with fine black setae, with a dense patch of black setae rounded the tracheal spiracles and lungs opening. Pale yellow spinnerets. Tarsi I–IV with dense scopulae, and metatarsi III-IV with moderate scopulae. Measurements: total length 12.56, carapace length 7.03, width 5.27, height 1.49. Clypeus height 0.32. Eye diameters and interdistances: AME 0.55, ALE 0.44, PME 0.35, PLE 0.43; AME–AME 1.42, AME–ALE 1.64, AME–PME 1.21, PME–PME 1.61, PME–PLE 1.55, ALE–PLE 0.98. Chelicerae length 4.60. Sternum length 3.92, width 3.01. Legs: I—femur 6.26/ patella 3.29/ tibia 6.40/ metatarsus 6.30/ tarsus 2.54/ total 24.79; II—6.24/ 3.36/ 6.23/ 5.71/ 2.7/ 24.24; III—5.31/ 2.98/ 4.42/ 4.67/ 1.94/ 19.32; IV—6.52/ 2.90/ 5.93/ 6.43/ 2.69/ 24.47. Opisthosoma length 5.53. Legs and palp macrosetae pattern: palpal femur d 1-0-1, tibia p 1-0-1. I—femur d 1-0-1, p 0-1d-1d, r 0-1d-1d; tibia v 2-1-2-2 (2-2-2), p 1-0-1d (0-1d-0), r 0-1d-0; metatarsus v 2-2- 1p. II=I. III—femur d 1-0-1r, p 0-1d-1d, r 0-1d-1d; tibia v 1p-2-2, p 1-1, r 1-1; metatarsus v 2-1p-2, d p1r1-p1r1-p1r1, p 0-0-1, r 0-0-1; IV—femur=III, tibia v 1p-2-1p, p and r=III, metatarsus v 2-2-2, p and r=III. Epigynum: median field wider than longer and rhomboidal; anterior projections very wide, subtriangular, and strongly sclerotized on the apical side; posterior plates large, very wide, and anteriorly rounded and convex; primary spermathecae small and rounded; secondary spermathecae larger than primary ones, heavily bulging, and sub-rounded; stalk of secondary spermathecae long and wide, thinner towards the primary spermathecae; fertilization ducts almost as long as primary spermathecae length and anteriorly inserted on the prolateral side of the primary spermathecae ( Fig. 24A–D View FIGURE 24 ).

Distribution. Only known from the type locality in Santander department ( Figs 32–33 View FIGURE 32 View FIGURE 33 ).