Figure 16 d, e; Map 5
Type. Holotype male: MEXICO: Chihuahua: Sierra del Nido, Arroyo del Álamo, 29°20′N, 106°50′W, 19.X.1969, collected in juvenile stage (matured 5.V.1970), V. Roth (CASENT 9048869), deposited at CAS.
Etymology. The specific name is a noun in apposition taken from the type locality.
Diagnosis. This species is diagnosed in having the median apophysis as long as wide (Fig. 16 d). It differs from N. calavera and N. lutzi in having a tegular median process strongly sclerotized (Fig. 16 d) and from N. rothi in having the RTA with dorsal projection flattened (Fig. 16 e).
Description. Male (holotype): Carapace light brown, white feathery scales on ocular region. Chelicerae and condyles orange. Endites yellow. Labium light brown with white tip. Sternum brown with a central yellow band. Legs with coxa, trochanter and femur yellow, patella to tarsus orange, dim black spots on coxa and trochanter, three black rings on femur, two on tibia and metatarsus. Opisthosoma light brown with lateral black bands. PLS with basal segment brown. Total length 5.5. Carapace length 2.88, width 1.88, cephalic region width 1.08, ocular region width 0.62. Eye diameter: AME 0.1, ALE 0.15, PME and PLE 0.13. Distance between eyes: AME-AME 0.04, AME-ALE 0.06, AME-PME 0.1, ALE-PLE 0.04, ALE-ALE 0.21, PME-PME 0.08, PME-PLE 0.08. Clypeus height 0.13. Chelicerae with three to four retromarginal teeth; basal segment length 1.06, fang length 0.45. Labium almost as long as wide (0.43/0.52). Endites slightly convergent (distance at their base compared at their tips 0.52/ 0.42). Sternum longer than wide (1.48/1.14). Opisthosoma longer than wide (2.63/1.75). Anterior spinnerets separated almost by their basal diameter (0.21/0.23), posterior spinnerets with distal segment shorter than basal segment (0.33/0.46). Leg lengths: I—femur 2.5/ patella-tibia 3.13/ metatarsus 2.38/ tarsus 1.75; II—2.5/ 3.13/ 2.5/ 1.75; III—2.5/ 2.88/ 2.63/ 1.38; IV—3.38/ 3.75/ 4/ 1.88. Spination: Femur dorsal I—1-1 -2/ II—1-1 -2/ III—1-1 -2/ IV—1-1 -2; patella I—dorsal 1-1/ prolateral 1/ retrolateral 0; II—1-1 / 1/ 0; III—1-1 / 1/ 1; IV—1-1 / 1/ 1; tibia Idorsal 1-1-0/ ventral 2-2-2/ prolateral 1-1-0/ retrolateral 0; II—1-1 -0/ 1-2-2/ 1-1-0/ 0; III—1-1 -0/ 2-1-2/ 1-1-0/ 1-1- 0; IV—1-1 -0/ 1-2-2/ 1-1-0/ 1-1-0; metatarsus I—0/ 2-2-2/ 1-1-0/ 0; II—0/ 2-2-2/ 1-1-0/ 0; III—2-2 -2/ 2-2-2/ 0-1-1/ 0-0-1; IV—3-2 -2/ 2-1-1-2-2/ 0-1-1/ 0-0-1. Number of trichobothria: I—6, II—6, III—5, IV—4. Number of dorsal spines on pedipalp: femur 2, tibia 3. Cymbium length 1.27, width 0.73. Embolus curved; conductor with dorsal projection larger than ventral one; tegular median process with a notched tip; median apophysis reduced; dorsal projection of RTA large and flattened, ventral projection short (Fig. 16 d, e).
Female. Unknown.
Distribution. MEXICO: Chihuahua (Map 5).