Stormtropis muisca, Perafan, Carlos, Galvis, William & Perez-Miles, Fernando, 2019

Perafan, Carlos, Galvis, William & Perez-Miles, Fernando, 2019, The first Paratropididae (Araneae, Mygalomorphae) from Colombia: new genus, species and records, ZooKeys 830, pp. 1-32 : 1

Stormtropis muisca sp. n. Figure 6

Type material.

Holotype male from Colombia, Boyacá, Sotaquirá, Vereda Guaguaní, 5.80886N, 73.25063W, 3415 m, 8-10-vi-2015, col. Y Cifuentes, J Moreno (ICN-Ar 11440). Paratype: 1 male from Colombia, Boyacá, Villa de Leyva, Santuario de Flora y Fauna Iguaque, 11-iv-2000, pitfall, col. C Fagua (ICN-Ar 880).

Diagnosis.

Males of Stormtropis muisca sp. n. differ from those of all other species of Stormtropis gen. n. by the absence of tibial apophysis, and by the pattern of abdominal color, grayish brown with a pattern of seven pairs of lighter dots, and sub-circular carapace (Figure 6A). Also, by the palpal bulb elongated, with the embolus slightly curved tapering to the apex, which is stout but flattened, and a very small subapical triangular tooth (Figure 6D, E).

Description.

Male (ICN-Ar 11440) (Figure 6): total length 9.5; carapace length 4.6, width 4.8; abdomen length 4.6, width 3.5; chelicerae length 1.3. Color (in alcohol): body with few soil particles encrusted; carapace, chelicerae and legs dark reddish brown; abdomen grayish brown with a pattern of seven pairs of lighter dots (Figure 6A). Carapace slightly setose, striae conspicuous, lateral margins with single line of spiniform setae; caput very arched, separated from thoracic region by transverse shallow fovea, straight, width 0.9 (Figure 6A). Eyes and ocular tubercle: tubercle length 0.73, width 0.8, very elevated (height 0.5) and forwardly directed, with few stout setae. Clypeus absent. Anterior eye row slightly procurved, posterior recurved. Ocular sizes and interdistances: AME 0.25, ALE 0.25, PME 0.10, PLE 0.20, AME-AME 0.15, AME-ALE 0.25, PME-PME 0.40, PME-PLE 0.03, ALE-PLE 0.08, AME-PME 0.05, ALE-ALE 0.50, PLE-PLE 0.50. Chelicerae: short sparse bristles on dorsal and lateral areas, long fine bristles on ventral and anterior areas. Rastellum absent. Cheliceral furrow with two rows of well-developed teeth, 8/7 and 6/6 teeth on promargin and retromargin, respectively. Labium: length 0.5, width 1.2, with 69 cuspules on anterior edge (Figure 6C). Labio-sternal groove of uniform width. Maxillae longer than wide, with the anterior prolateral lobe very elongated, conical (Figure 6C); with 37/36 conical cuspules spaced, largely spread over prolatero-ventral border from the inner edge to anterior lobe. Lyra absent. Sternum: length 1.8, width 2.5; three pairs of sigillae, anterior subcircular, median and posterior sigillae oval; anterior and median sigillae marginal, posterior submarginal. Anterior edge of sternum with a semicircular area slightly elevated (joined to labio-sternal groove) (Figure 6C).

Legs: cuticle normal. Leg and palpal segments measurements provided in Table 6. Leg I clearly thicker than the others. Bristles and thorn-like setae present. Trichobothria: filiform, on central 2/3 of tarsi, palp 4, leg I 7, II 5, III 4, IV 4; on distal 1/4 of metatarsi, leg I 4, II 3, III 3, IV 3; on proximal 1/3 of tibiae, palp and legs I-III two rows of 2 each, IV a row of 3p and 1d. Scopulae absent. Pseudoscopula weak and divided by conical longer setae, only present on distal tarsi I, II and III; tarsi IV with few sparse pseudoscopula setae. Claw tufts absent. Tarsi distally incrassate, mainly on anterior legs. Tarsal claws: ITC absent on all legs, but a very small tooth present on legs I; STC with one curved tooth on all legs. Spination: principally thorn-like setae on all segments. Spines absent.

Palp: cymbium with two unequal lobes separated by a sclerotized groove; tibia with shallow distoventral groove. Palpal bulb pyriform; embolus slightly curved tapering to the apex, apex stout but flattened, a subapical triangular tooth on embolus (Figure 6D, E).

Abdomen: with four longitudinal dorsal rows of nine small tubercles, each emitting from its summit a spiniform seta. Book lung apertures projected, oval, sclerotized (Figure 6B). Spinnerets: PMS length 0.10; PLS length 1.40, apical segment digitiform (Figure 6B).

Female: Unknown.

Distribution.

Eastern Cordillera of Colombian Andes, at a height above 3000 m, Páramo biogeographic province. Boyacá Department, municipality of Sotaquirá ( Guaguaní) and Iguaque Fauna and Flora Sanctuary (Figure 10).

Etymology.

The species epithet muisca is a noun in apposition which refers to the indigenous tribe who inhabit in the same region where this species occur.