Nanophareus maipu, Hara, Marcos Ryotaro, 2016

Hara, Marcos Ryotaro, 2016, Cladistic analysis and description of three new species of the Chilean genus Nanophareus (Opiliones: Gonyleptidae: Pachylinae), Zootaxa 4105 (2), pp. 101-123 : 114-117

Nanophareus maipu sp. nov.

( Figs 4 , 5 , 8 C–E, 9)

Type material. CHILE. Región Metropolitana (Santiago): Maipu (Quebrada de la Plata, la Rinconada; - 33°30’S - 70°55’W), 26.vii.1966, E. Schlinger & M. Irwin leg., ma holotype & 1 fe paratype (CASENT 9033796).

Note: The male holotype lacks part of right leg II (patella—tarsus), left leg II and both legs III entirely. The vial CASENT 9033796 also includes the juveniles, but those are not to be considered type material.

Other material examined. CHILE. Región Metropolitana (Santiago): Maipu (Quebrada de la Plata, la Rinconada; - 33°30’S - 70°55’W), 26.vii.1966, E. Schlinger & M. Irwin leg., 2 jv (CASENT 9033796).

Diagnosis for males. Nanophareus maipu sp. nov. resembles N. araucanus by the frontal hump on the anterior margin of dorsal scutum bearing two high median enlarged tubercles, ocularium domed and not widened (approximately ⅓ carapace width), scutal area IV undivided, trochanter IV with two prolateral apophyses and one retroapical enlarged tubercle. Can be distinguished from N. araucanus by: unarmed ocularium and scutal areas, prolateral apical apophysis of coxa IV single, and retrolaterally unarmed femur IV. Can be distinguished from the other species of the genus by the combination of the following characters: ocularium domed and not widened, unarmed scutal areas, absence of enlarged prolateral apophysis on coxa I (in dorsal and lateral views), prolateral apical apophysis of coxa IV single, shape, size and proportion of the submedian prolateral and proapical apophyses of trochanter IV, and a pair of ventroapical spines on femur IV.

Etymology. It is a noun in apposition, in reference of the type locality—comuna Maipu .

Description. Male (holotype): Dorsum ( Fig. 4 A, C): Measurements: CL 1.40; CW 1.60; DSL 3.50; DSW 3.25; LI 7.05; LII 3.30 (trochanter—femur); LIII -; LIV 12.35. Anterior margin of carapace with granulate frontal hump bearing 2 high, enlarged median tubercles. Ocularium domed and not widened (approximately ⅓ carapace width), covered with slightly enlarged tubercles. Carapace with sparse tubercles. Scutal areas I–IV unarmed with scattered tubercles; scutal area IV undivided. Body shape type gamma. Lateral margin of dorsal scutum with a row of enlarged tubercles inserted amongst small ones, more densely distributed between grooves II and III.

Venter ( Fig. 4 B): Coxae I–IV and stigmatic area tuberculate; coxae I–II with enlarged tubercles in median rows; coxa II also with enlarged tubercles on apical and retrolateral regions. Free sternites each with 1 row of tubercles.

Chelicerae: Segment I with bulla slightly marked; fixed finger with 4 teeth; movable finger with 3–4 teeth.

Pedipalps ( Fig. 4 E–G): Coxa with 1 prolateral basal enlarged tubercle, 0–2 retroapical enlarged tubercles. Trochanter inflated with 2–3 tubercles, ventral side with 2 enlarged setiferous tubercles. Femur dorsal side with sparse tubercles, with 1 prolateral subapical seta (absent in right pedipalp), ventral side with 3–4 tubercles and 1 enlarged basal one. Patella dorsally inserted in tibia (see in lateral view). Tibia dorso-laterally tuberculate; tibia baso-ventrally curved at 90° in lateral view. Tibial setation: prolateral IIi, retrolateral I[Ii]. Tarsal setation: prolateral IiIii, retrolateral iIiIii.

Legs ( Figs 4 D, 5): Coxa I with 1 retrolateral apophysis; coxa II with 1 prolateral apophysis, 1 median enlarged tubercle and 1 retrolateral projection, this fused to prolateral apophysis of coxa III; coxa III with 1 prolateral and 1 retrolateral apophyses; coxa IV tuberculate, with 1 prolateral apical apophysis, directed backwards, without retrolateral apical apophysis (retrolaterally apically unarmed). Trochanter IV longer than wide, prolateral side with 1 conical, short, blunt submedian apophysis, swollen in the middle, and 1 conical, robust, blunt apical apophysis, this one projected laterally and slightly curved dorsally; retrolateral side with 2 median slightly enlarged tubercles, 1 apical enlarged tubercle. Femora I–II unarmed. Femur IV slightly curved retrolaterally, with a retrolateral row of enlarged tubercles increasing in size subapically; dorsoapical side with 1 pair of enlarged tubercles; ventral side with 2 rows of tubercles, prolateral one with tubercles increasing in size apically (3 large), retrolateral one with enlarged tubercles in the middle; ventroapical side with 2 enlarged spines (proventral largest). Patellae I–IV tuberculate; patellae I–III unarmed. Patella IV with retrolateral tubercles increasing in size in the middle; ventral tubercles increasing in size apically, prolateral ones enlarged, becoming high and pointed, 1 prolateral ventral apical spine. Tibia I unarmed; tibia IV with 2 ventral rows, retrolateral one with tubercles increasing in size apically, becoming high and pointed, ventroapical side with 1 prolateral tubercle and 1 retrolateral spine. Tarsal segmentation: 6(3),?,?, 6.

Penis ( Fig. 8 C–E): Glans with wide sac; stylus elongated and slightly curved, with subapical ventral trichomes; ventral process apex blunt, curved towards stylus. Ventral plate rectangular, basally inflated, with 3–4 pairs of MS C (right distal seta smallest), 1 pair of short MS D, 1 pair of small MS E, 3 pairs of basal setae.

Coloration: Most of the body pale brown; pedipalps, legs I–II and metatarsus–tarsus IV yellowish pale brown; margins of dorsal scutum, posterior margins of free tergites and apex of apophyses and enlarged tubercles dark brown.

Female (paratype; fig. 4H): DSL 3.80; DSW 3.25; LI 6.35; LII 10.45; LIII 7.60; LIV 10.15. Anterior margin of carapace with granulate frontal hump bearing 1 high, enlarged median tubercle. Posterior margin of dorsal scutum and free tergites I–III, each with 2 rows of tubercles. Venter: Coxa I with median and apical enlarged tubercles; coxa II with subapical enlarged tubercles. Pedipalps: Tibial setation: prolateral IIi, III. Tarsal setation: retrolateral iIiIii, IiIii. Legs: coxa IV short (reaching scutal grooves III–IV), with 1 prolateral apical enlarged pointed tubercle. Trochanter IV prolateral side with 1 proapical and 1 retroapical enlarged tubercles. Femur III with 2 dorsoapical enlarged tubercles; femur IV ditto, ventral side with 2 rows of tubercles, prolateral one with tubercles increasing in size apically, becoming pointed, ventroapical side with 1 prolateral spine and 1 retrolateral enlarged tubercle. Patellae I–IV tuberculate, unarmed. Tibiae I–IV tuberculate, unarmed. Tarsal segmentation: 6(3), 5(3), 6, 6.

Type locality. Chile, Región Metropolitana (Santiago), Maipu .

Geographical distribution ( Fig. 9 ). Known only from the type locality.

Figures

FIGURE 4. Nanophareus maipu sp. nov. Male (holotype): A, habitus, dorsal view; B, ditto, ventral view (schematic illustration, omitting tubercles of regular size); C, ditto, right lateral view; D, right tarsus IV, prolateral view; E, right pedipalp, prolateral view; F, ditto, retrolateral view; G, left pedipalpal femur, prolateral view. Female (paratype; CASENT 9033796): H, right pedipalp, prolateral view. A, C at same scale; E – H at same scale. Scale bars of A – C, E – H: 1 mm. Scale bar of D: 0.5 mm.

FIGURE 5. Nanophareus maipu sp. nov. Male (holotype) right leg IV: A, dorsal view; B, prolateral view; C, ventral view; D, retrolateral view. A – D at same scale. Scale bar: 1 mm.

FIGURE 8. Distal part of Nanophareus spp. penis: A, N. bicornutus sp. nov., dorsal view, B, ditto, right lateral view; C, N. maipu sp. nov., in dorsal view, D, ditto, right lateral view, E, ditto, ventral view; F, N. polyhastatus sp. nov., dorsal view, G, ditto, right lateral view. Abbreviations: bms, basal group of macrosetae (MS); Gl, glans; MS C, MS of group C; MS D, MS of group D; MS E, MS of group E; St, stylus of glans; Vpl, ventral plate; Vpr, ventral process of glans; Vt, ventral trichomes. A, B at same scale; C – E at same scale, F, G at same scale. Scale bars: 0.1 mm.

FIGURE 9. Distribution of Nanophareus spp. The precise locality of N. palpalis is unknown.