Eutimesius simoni Roewer 1913
Creators: name: Villarreal, Osvaldo
name: Ahumada-C., Daniela
name: Navas-S., Gabriel R.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Stygnidae
Eutimesius
Eutimesius simoni

description: Eutimesius simoni Roewer, 1913
Figs 13, 14 M – O, 2
Eutimesius simoni Roewer, C.-F. (1913): 453, figs 178.
Xanthostygnus fractus Mello-Leitão, C. F. (1949): 32.
Xanthostygnus fractus Mello-Leitão, 1949 is a junior subjective synonym of Eutimesius simoni Roewer, 1913 in Pinto-da-Rocha (1997): 190.
Eutimesius miles Henriksen, K. L. (1932): 293, fig. 10.
Eutimesius miles Sørensen, 1932, is a junior subjective synonym of Eutimesius simoni Roewer, 1913, in Pinto-da-Rocha (1997): 190.
Material examined.
Colombia • 1 ♂; Amazonas (New department record), Leticia, Km 11 vía a Tarapacá; [4.1209 ° S, 69.9508 ° W]; (Animal systematics [students leg.]) (ICN-Ao - 196). • 1 ♂; Amazonas, Leticia, Km 11 vía a Tarapacá; [4.1195 ° S, 69.9522 ° W]; 110 m a. s. l.; pitfall; 27 Oct. 2002; (Animal systematics II leg.) (ICN-Ao - 512). • 1 ♂; Amazonas, Leticia, Km 11 vía a Tarapacá; [4.1195 ° S, 69.9522 ° W]; 11 Nov. 2001; (Students and Flórez, E. leg.) (ICN-Ao - 328). • 1 ♀; Amazonas, Leticia, Km 11 vía a Tarapacá, Quebrada Yahuarcaca, Finca El Agape; [4.1348 ° S, 69.9436 ° W]; 100 m a. s. l.; pitfall; Mar. 2009; (Mojica, J. I. leg.) (ICN-Ao - 641). • 1 ♀; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; 06 Oct. 2005; (Hernandéz, C., Lozano, M., Otero, T. leg.) (MPUJ _ ENT 0094626). • 1 ♂; Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; Oct 2005; (Cortes, Hernández, Lozano, Otero leg.) (MPUJ _ ENT 0094638). • 1 ♀; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; manual collection; 24 Mar. 2004; (Galindo, A. leg.) (MPUJ _ ENT 0094635). • 1 ♀; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; 06 Oct. 2005; (Trejos, C. et al. leg.) (MPUJ _ ENT 0094636) • 1 ♀; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; 30 Oct. 2005; (Rodríguez, G. et al. leg.) (MPUJ _ ENT 0094623). • 1 ♀; Amazonas, Leticia, Monilla Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; vegetation shake; 24 Mar. 2004; (Rodríguez, D. leg.) (MPUJ _ ENT 0094643). • 1 ♀; Amazonas, Leticia, Monilla Amena, Várzea; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; vegetation shake; 05 Oct. 2005; (Escobar, L., Morales, A. leg.) (MPUJ _ ENT 0094628) • 1 ♂; Amazonas, Leticia, Monifue Amena, Várzea; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; manual collection; 05 Oct. 2005; (Ardilla, Corredor, Echeverri leg.) (MPUJ _ ENT 0094634). • 1 ♀; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; vegetation shake; 04 Oct. 2005; (Ardila, Corredor, Echeverri leg.) (MPUJ _ ENT 0094642). • 1 ♂; Amazonas, Leticia, Monifue Amena; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; vegetation shake; 24 Mar. 2004; (Moreno, N., Uribe, D. leg.) (MPUJ _ ENT 0094630). • 1 ♂; Amazonas, Leticia, Monifue Amena, Várzea; [4 ° 6 ' 54.45 " S, 69 ° 55 ' 39.82 " W]; 70 m a. s. l.; vegetation shake; 30 Sep. 2004; (Salcedo, A., Charry, E., Jaramillo leg.) (MPUJ _ ENT 0094637). • 1 ♀; Amazonas, Leticia, Comunidad Monilla Amena; [3 ° 47 ' 34.75 " S, 69 ° 52 ' 13.88 " W]; 70 m a. s. l.; vegetation shake; (Díaz, A., Arango, S., Sánchez, F. leg.) (MPUJ _ ENT 0094625).
Diagnosis.
Can be distinguished from all other species of the genus by the fusion of the paired spines of scutal area III (Fig. 13).
Complementary description.
Male. Measurements. Males (ICN-Ao - 196, ICN-Ao - 328, ICN-Ao - 512). DSL: 1.3–1.5; DSW: 2.2–2.5; AL: 1.8–2.4; AW: 2.6–2.7; IOD: 1.2–1.5; pedipalp: CoPp 0.6–0.7, TrPp 0.4–0.6, FePp 2.7–3.0, PaPp 1.3–1.6, TiPp 1.2–1.4, TaPp 0.9–1.2, ClPp: 0.5–0.7, total 6.8–8.5; Leg IV: FeL 7.8–8.9, TiL 4.1–4.9. Female (ICN-Ao - 641). DSL: 2.5; DSW: 2.9; AL: 1.2; AW: 2.4; IOD: 1.3; pedipalp: CoPp 0.6, TrPp 0.4, FePp 2.6, PaPp 1.3, TiPp 1.2, TaPp 0.9, ClPp 0.6, total 6.5; Leg IV: FeL 8.7, TiL 5.1. Penis (Fig. 14 M – O). Heterostygninae general pattern. Malleus swollen. LP with a neck and a wide circular distal cleft. MS - A 1 - A 2 located on malleus; MS - B pair ventrally located, near the base of LP on the malleus; two pairs of MS - C located dorsomedially on LP, distally to the neck; MS - D 1 large, located slightly proximal to MS - E; MS - D 2 basally located, near glans basis; MS - E with two pairs of short setae. Glans bulbous, with short and dorsally curved stylus with small dorsal process.
Remarks.
Subtle variations were observed in the shape of the LP, which presents less pronounced and rounded lateral projections (instead of acute), a wider neck, and the MS - A, which are separated from each other, with one pair positioned almost ventrally and the other almost dorsally (Fig. 14 M – O). Additionally, slight variations in leg coloration and the pattern of dry spots were observed in individuals potentially identified as E. simoni, which were evaluated solely through photographs of live specimens (Fig. 15). Due to these variations and limitations in the material study, we have included these records on the map (Fig. 2) as Eutimesius cf. simoni, leaving open the possibility that more than one species may be involved in the Amazonian populations.
Distribution.
Brazil, Amazonas; Colombia, Amazonas; Ecuador, Napo, and Los Ríos; Peru, Loreto (Fig. 15). The species was originally documented in Puerto Asis but erroneously attributed to the Department of Guainia (Pinto-da-Rocha 1997). We hereby correct this misattribution and reassign it to its accurate department, Putumayo.
description: Published as part of Villarreal, Osvaldo, Ahumada-C., Daniela & Navas-S., Gabriel R., 2024, Exploring the diversity of Eutimesius Roewer, 1913: new species and records from Colombia and Venezuela (Opiliones, Gonyleptoidea, Stygnidae), pp. 803-820 in Zoosystematics and Evolution 100 (3) on pages 803-820, DOI: 10.3897/zse.100.120207