Maurymontia mborore, Porto & Iglesias & Pérez-González, 2025

Porto, Willians, Iglesias, Patricia P. & Pérez-González, Abel, 2025, Disentangling the South American “ Ceratomontia ”: new genus, new combinations, and new species (Opiliones: Laniatores: Triaenonychidae), Zootaxa 5729 (2), pp. 233-263 : 255-257

Maurymontia mborore sp. nov.

( Figs 1F , 2A , 22–23 )

urn:lsid:zoobank.org:act:

Type material ♂ holotype (MACN-Ar 47760) from Argentina, Misiones Province, Dpto Oberá, Protected área Cerro Mbororé , S 27.683901 W 54.912102 ( GPS +- 200 m), elev. 180 m . 13.III. 2024, Alto Paraná Atlantic Forests, sifting/berlese, ILF Magalhaes, L Peralta (IFM-loc-123c).

Etymology. The specific epithet mborore is a Guaraní word referring to “Cerro Mbororé”, the type locality. The noun in apposition maintains the original orthography of this geographically significant site.

Diagnosis. This species can be distinguished from the other species of the genus by having the ventral plate of penis with a cleft, forming two lamellae ( Fig. 23 ).

Measurements holotype (MACN-Ar 47760): Total length 1.56; carapace length 0.72, maximum width 1.03; dorsal scutum length 1.32; mesotergal scute maximum width 1.22. Pedipalps: trochanter 0.20, femur 0.73, patella 0.47, tibia 0.62, tarsus 0.49. Leg I: trochanter 0.13, femur 0.67, patella 0.31, tibia 0.45, metatarsus 0.50, tarsus 0.49. Leg II: trochanter 0.16, femur 0.85, patella 0.36, tibia 0.74, metatarsus 0.65, tarsus 0.71. Leg III: trochanter 0.17, femur 0.59, patella 0.22, tibia 0.49, metatarsus 0.54, tarsus 0.42. Leg IV: trochanter 0.27, femur 0.84, patella 0.33, tibia 0.67, metatarsus 0.90, tarsus 0.45.

Description. Male (MACN-Ar 47760). Dorsum ( Fig. 22 A–C ) Eta (η) hourglass-shaped dorsal scutum. Ocularium conical, short, with the dorsal surface adorned with granules. Eyes are located in the middle of the ocularium. Anterior margin bearing four tubercles. The dorsal scutum reveals well-defined areas covered by small tubercles. Free tergites are covered by small tubercles, some bearing setae.

Venter ( Fig. 22 D ). Distal areas of the coxae covered by granules, coxa II has a distal tubercle longer than the others present in the other coxae. Spiracles visible. Sternum arrow-shaped, located in a microgranulate groove.

Chelicerae. Segment I–II with small scattered tubercles.

Pedipalp ( Fig. 23 A ). Trochanter with one dorsal and ventral tubercles with subdistal setae. Femur with a ventro-ectal tubercle and a row of small tubercles with setae in dorso-ectal view. The ventral femur exhibits a row of ventral tubercles with subdistal setae. Patella smooth. Tibia is covered ventrally by small rounded tubercles and has three ventral tubercles with subdistal setae on each side. Tarsus has three ventral tubercles with subdistal setae each side and small scattered ventral tubercles with subdistal setae.

Legs. Leg I–IV covered by small tubercles (the femur I has a ventral row of five tubercles larger than other legs), astragalus larger than the calcaneus on all legs, tarsal count: 2-2-3-3.

Penis ( Fig. 23 B–D ). Pars distalis with a ventral plate, with a cleft, forming two lamellae, with three ventral and two dorsal macrosetae each side; capsula externa higher than the ventral plate, surrounding the capsula interna that is tubular in shape. The capsula interna is longer than capsula externa. Distal portion of the stylus curved ventrally.

Female

Unknown

Distribution. Known only from the type locality ( Fig. 2 A ).

Figures

FIGURE 1. Live pictures of Maurymontia argentina comb. nov. (A) male dorsal (resting position), (B) male dorsal (thanatosis position), (C) juvenile dorsal, (D) juvenile ventral. (E) male field picture. Maurymontia mborore sp. nov. (F) lateral view. Figure credits: A—E Abel Pérez-González, F Ivan Magalhaes.

FIGURE 2. Distribution of Maurymontia species with elevation layers (A). Distribution of Maurymontia species, showing the representation of the Peripampasic Arc (B).

FIGURE 22. Maurymontia mborore sp. nov., male. Scale bar 1 mm.

FIGURE 23. Maurymontia mborore sp. nov., male, pedipalp, ectal (A). Penis, ventral view (B), lateral view (C), dorsal view (D). Scale bar: A 500 µm, B–D 100 µm.