Figs 5, 14, 71–98; Map 1
Type material: Holotype: male from road to Manu, km 165, Consuelo, Cusco, Peru, litter under crown of fallen tree, 7 October 1982, L.E. Watrous & G. Mazurek leg. (FMNH 0 33 572, PBI _ OON 10079). Paratype: one female from Tambopata, Madre de Dios, Peru (12 ° 34 ' 23.02 "S, 69 ° 12 ' 50.06 "W), litter under crow of fallen tree, 28 October 1982, L.E. Watrous & G. Mazurek leg. (FMNH 0 33 543, PBI _ OON 10050).
Etymology. The specific name is a noun in apposition and refers to the ancestral people who lived in the region where the specimens were collected.
Diagnosis. Males resemble those of N. coca sp. nov. (Figs 49, 50, 54), N. beni sp. nov. (Figs 108–111) and N. tuparro sp. nov. (Figs 127, 128, 131, 132) by the smooth carapace, with enlarged setal sockets on the posterior surface, unmodified sternum, and absence of denticles on abdominal dorsal scutum (Figs 71 –73, 75). Differ from those of N. coca sp. nov. (Fig. 58) by the presence of a prolateral, proximal embolar lamella (Fig. 87); from those of N. beni sp. nov. (Fig. 11) by the shorter embolar apical projection (Fig. 5) and from those of N. tuparro sp. nov. (Figs 12, 138) by the absence of an additional, retrolateral embolar process (Figs 5, 78, 86). Females differ from those of N. coca sp. nov. (Fig. 62) by the smooth carapace and from those of N. beni sp. nov. (Fig. 15) by the genital median element placed anteriorly (Fig. 14).
Description. Male (PBI _ OON 10680): total length 2.30. Cephalothorax: carapace dark red-brown, broadly oval, pars cephalica slightly elevated, posterolateral surface without spikes, surface and sides smooth; lateral margin with small denticles (Figs 74–75); posterior part with one pair of well-developed tubercles (Figs 75, 82); recurved set of setae on posterior surface with four small tubercles (Fig. 82). Clypeus margin slightly reborded, straight in frontal view (Fig. 74). Sternum as long as wide, dark red-brown, with smooth surface. Chelicerae, endites and labium dark red-brown. Abdomen: book lung covers large and round. Dorsal scutum dark red-brown, middle surface and sides smooth, anterior half without projecting denticles (Figs 77, 84). Epigastric and postepigastric scutum dark red-brown. Legs: orange-brown. Leg spination: tibia I v 4 - 4 -0; metatarus I v 2 - 2 -0. Genitalia: epigastric region with sperm pore small and circular. Palp proximal articles, bulb and cymbium pale orange. Embolus without prolateral prong, apical projection truncated (Figs 86, 88).
Female (PBI _ OON 10680): total length 2.56. Cephalothorax: carapace posterior surface with two pairs of tubercles (Fig. 93). Clypeus high (Fig. 95). Abdomen: groove connecting the posterior spiracles bearing pockets (Fig. 98). Legs: leg spination: tibia I v 6 - 2 - 2; II v 4 - 4 -0; metatarsus I v 4 - 2 -0; II v 4 - 0-2. Genitalia: circular genital median element (Figs 14, 98).
Other material examined. PERU: Cusco : 1 ♀, road to Manu, km 165, 0 7 October 1982, leaf litter, L.E. Watrous & G. Mazurek leg. (FMNH 0 33 542, PBI _ OON 10049); 1 ♂, 0 1 October 1982, rotten palm fruit L.E. Watrous & G. Mazurek leg. (FMNH 0 33 588, PBI _ OON 10095); 1 ♀, 0 6 October 1982, leaf litter, L.E Watrous & G. Mazurek leg (FMNH 0 33 590, PBI _ OON 10097); 5 ♂, 12 October 1982, leaf litter, L.E. Watrous & G. Mazurek leg. (FMNH 82-375, PBI _ OON 38408); 1 ♂ (FMNH 82-360, PBI _ OON 38406); 1 ♂ (FMNH 82-381, PBI _ OON 38407); 1 ♂, Río Camisea Pagoreni (11 ° 42 ’ 22.5 ”S, 72 ° 54 ’ 10.7 ”W), 0 9 September 1998, 465 m, S. Córdova leg. (MUSM 050/ 436, PBI _ OON 40592); 2 ♂, 07– 28 May 1998, pitfall trap, S. Córdova leg. (MUSM 050/ 434, PBI _ OON 40601); 1 ♀, 1 ♂ (MUSM 050/ 429, PBI _ OON 40587); 1 ♂ (MUSM 050/ 430, PBI _ OON 40590); 1 ♀, Río Camisea, San Martin (11 ° 47 ’09.8”S, 72 ° 42 ’05.3”W), 0 9 November 1997, pitfall trap, 474 m, S. Córdova leg. (MUSM 0500/ 467, PBI _ OON 40596); 1 ♀ (MUSM 0500/ 466, PBI _ OON 40588); 1 ♂, 0 7 November 1997 (MUSM 0500- 463, PBI _ OON 40595); 1 ♂, 0 8 November 1997 (MUSM-ENT 050/ 465, PBI _ OON 40597). Madre de Dios: 1 ♂, Tambopata, 25 October 1982, litter along river, L.E. Watrous & G. Mazurek leg. (FMNH 0 33 548, PBI _ OON 10055); 1 ♂, 25 October 1982, rotten palm flowers, L.E. Watrous & G. Mazurek leg. (FMNH 0 33 592, PBI _ OON 10099); 1 ♀, 28 October 1982, bamboo litter, L.E. Watrous & G. Mazurek leg. (FMNH 82-402, PBI _ OON 10607); 1 ♂ (FMNH 82-402, PBI _ OON 10625). Loreto: 1 ♀, 1 ♂, Pithecia (4 ° 13 ' 55.89 "S, 74 ° 13 ' 3.74 "W), T. Erwin & D. Silva leg. (MUSM, PBI _ OON 40604).
Distribution. Known from Loreto, Madre de Dios and Cusco Departments in Peru.