Aptostichus cahuilla Bond 2012

Aptostichus cahuilla es una especie de araña migalomorfa del género Aptostichus, familia Euctenizidae.​ Fue descrita científicamente por Bond en 2012.​

Habita en los Estados Unidos.​

Aptostichus cahuilla est une espèce d'araignées mygalomorphes de la famille des Euctenizidae.

Specimen preparation and condition. Specimen collected live from pitfall trap, preserved in 80% EtOH. Coloration moderately faded. Pedipalp, leg I left side removed, stored in vial with specimen. General coloration. Carapace, chelicerae, legs strong brown 7.5YR 4/6; dusky purple markings along anterior margins of carapace. Abdomen uniform yellowish brown 10YR 5/4 dorsally, ventrum, spinnerets pale yellow; mottled chevron pattern (Fig. 204). Cephalothorax. Carapace 3.88 long, 3.28 wide, lightly hirsute, stout black bristles along fringe; surface smooth, pars cephalica elevated. Fringe, posterior margin with black bristles. Foveal groove deep, straight. Eyes on mound. AER slightly procurved, PER slightly recurved. PME slightly larger in diameter than AME. Sternum moderately setose, STRl 2.00, STRw 1.84. Posterior sternal sigilla small, positioned laterally, anterior sigilla pairs small, oval, marginal. Chelicerae with distinct anterior tooth row comprising 5 teeth, posterior margin with single row of small denticles. Palpal endites with patch of small cuspules on proximal, inner margin, labium with few cuspules, LBw 0.68, LBl 0.43. Rastellum consists of 5 very stout spines, one spine separated laterally. Abdomen. Setose, heavy black setae intermingled with fine black setae. Legs. Leg I: 3.76, 2.60, 2.29, 1.55, 1.30; leg IV: 3.52, 1.70. Light tarsal scopulae on legs I, II. Tarsus I with single, slightly staggered row of 10 trichobothria. Leg I spination pattern illustrated in Figures 205, 206, 208; TSp 3, TSr 3, TSrd 5. Pedipalp. Articles stout, lacking distinct spines (Figs 207). PTw 0.80, PTl 1.68, Bl 0.85. Embolus slender, with slight curvature at terminus (Fig. 207). Variation (9). Cl 3.42-4.38, 3.89±0.09; Cw 2.79-3.63, 3.11±0.08; STRl 1.92-2.46, 2.09±0.05; STRw 1.65-2.13, 1.84±0.05; LBw 0.57-0.69, 0.64±0.01; LBl 0.30-0.44, 0.37±0.02; leg I: 3.18-4.13, 3.60±0.10; 2.16-2.94, 2.52±0.08; 1.92-2.40, 2.20±0.05; 1.32-1.68, 1.55±0.04; 1.14-1.38, 1.27±0.02; leg IV: 3.00-3.75, 3.38±0.09; 1.5-1.81, 1.65±0.04; PTl 1.44-1.79, 1.62±0.04; PTw 0.72-0.81, 0.77±0.01; Bl 0.75-0.90, 0.81±0.02; TSp 3-5, 3.78±0.28; TSr 2-5, 4.11±0.35; TSrd 5-9, 6.22±0.46.

Aptostichus cahuilla is known from only from a few localities in Riverside County and one in southwestern San Bernardino County. Experience collecting this species indicates that it is found primarily in chaparral habitat but is considerably less abundant than the species with which it is sympatric (e.g., Aptostichus atomarius, Aptostichus icenoglei, and Aptostichus hesperus).