Aptostichus angelinajolieae Bond, 2008

Bond, Jason E., 2012, Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae), ZooKeys 252, pp. 1-209 : 43-46

Aptostichus angelinajolieae Bond, 2008 Figures 91-97Maps 6, 7

Aptostichus angelinajolieae Bond, 2008: 646. Female holotype (MY3310; EU569958), California, Monterey Co., Carmel Valley Rd/G16, 5.9km N of Arroyo Seco Rd, 36.29045, -121.46594 1, elev. 337m, coll. A. Stockman 9.vi.05, in CAS; male paratype (AP167) from Carmel, 36.5495, -121.9103 6, elev. 74m, coll. 8.ii.54, in AMNH examined.

Diagnosis.

Individuals of this species are difficult to diagnose from Aptostichus atomarius and Aptostichus stanfordianus on the basis of morphological features alone (Figs 91-94) but can be diagnosed on the basis of a set of unique mtDNA site substitutions (see Bond & Stockman 2008). The species is restricted in distribution to northern Monterey Co. (California) localities west of the Salinas Valley (Maps 6, 7) and can be distinguished from geographically proximate populations of Aptostichus stephencolberti on the basis of its darker coloration (Figs 95-97) and absence from coastal dune habitat.

Descriptions.

Described by Bond (2008).

Material examined.

United States: California: Monterey Co.: 1.6km W Seaside, 36.6227, -121.8363 5, 30m, M Irwin 23.viii.68 [AP289, 3juv, AMNH]; 2.2km from intersection G16/Carmel Valley Rd & Cachagua Rds on Cachagua Rd, 36.4411, -121.6877 1, 387m, J Bond 5.v.97 [AP754-76, 2♀, AUMNH; 1♀, AMNH]; 24km W Greenfield on Arroyo-Seco Rd, 36.2263, -121.4947 5, 300m, W. Icenogle 31.v.74 [AP193, 2♀, CAS]; Aguajito Rd & Monhollan Rd jct, 36.5753, -121.8737 1, 56m, A Stockman 10.vi.05 [MY3317, 1♀, AMNH; MY3318, 3380 2♀, AUMNH]; Cachagua Rd, 160m W jct w/ Carmel Valley Rd, 36.4455, -121.6827 1, 191m, A Stockman 10.vi.05 [MY3311-13, 2juv, 2♀, AUMNH]; Cachagua Rd, 13.7km W jct w/ Carmel Valley Rd, 36.392, -121.6252 1, 333m, A Stockman 10.vi.05 [MY3315, 3316 2♀, AUMNH]; Cachagua Rd, just S intersection w/G16, 36.4447, -121.6855 1 1, 245m, M Hedin, J Starrett, D Leavitt 21.xii.07 [MY3620, 3626, 3627, 3630, 3631, 2♀ 1♂ 2juv, AUMNH]; Cachagua Rd, 160m from jct Carmel Valley Rd, 36.4454, -121.6833 1, 225m, J Bond, M van der Merwe 13.xii.99 [MY708, 716 2♀, AUMNH]; J Bond, M van der Merwe 13.xii.99 [MY716, 1♀, AUMNH]; Calera Canyon Rd, 1.6km S Corral De Tierra Rd, 36.5383, -121.7376 1, 137m, A Stockman 10.vi.05 [MY3319, 3321 2♀, AUMNH; MY3320, 1♀, AMNH]; Carmel, 36.5495, -121.9103 6, 74m, 25.vii.67 [AP155, 1♂, AMNH], 8.ii.54 [AP167, 1♂, AMNH], 5.x.58 [AP177, 1♂, AMNH], V Roth 21.xii.53 [AP267, 2juv, AMNH]; Carmel Valley Rd, 36.4511, -121.6919 1, 165m, A Stockman 15.v.05 [MY3129-3131 3♀, AUMNH]; Carmel Valley Rd (G16), 1.3km N Tassajara Rd, 36.4096, -121.5934 4, 426m, J Starrett 29.xi.03 [AP1198, 1♀, AUMNH]; Carmel Valley Rd/G16, 5.9km N Arroyo Seco Rd, 36.2904, -121.4659 1, 337m, A Stockman 9.vi.05 [MY3309, 3310 2♀, AUMNH]; County Rd G16, 17.7km S Martin Rd intersection, 36.2776, -121.4503 5, 335m, F Coyle 30.vii.72 [AP268, 1♀, AMNH]; Cachagua Rd 6.5 miles SE Carmel Valley Village, 4.2km S intersection w/Carmel Valley Rd, 36.4278, -121.6825 4, 460m, W Icenogle 2.vi.74 [AP279, 1♀, CAS]; G20 (Laureles Grade Rd), ~1.3km S Laureles Summit, 36.524, -121.7558 1, 315m, M Hedin, J Starrett, D Leavitt 21.xii.07 [MY3623, 3628 2♀, AUMNH]; Intersection of Valenzuela & Viejo Rds, 36.5761, -121.8998 1, 120m, J Bond 1.iv.96 [AP723, 727 1♀ 1juv, AUMNH], 2.iv.96 [AP742, 1♀, AUMNH], 5.v.97 [AP751, 752-3, 6, 2juv, 2♀, AUMNH]; Klondike Rd, 6.4km E G16/Carmel Valley Rd, 36.4731, -121.707 1, 169m, J Bond, W Bond 27.vii.08 [MY3736, 1♀, AUMNH]; Monterey, ~100m N intersection Vieja & Valenzuela Rds, 36.5759, -121.8996 1, 91m, M Hedin, P Paquin, J Starrett 27.vii.02 [MY0632, 1♀, AUMNH]; Near jct Cachagua & Tassajara Rds, 36.3908, -121.5955 4, 410m, W Icenogle 2.vi.74 [AP277, 1♀, CAS]; Pacific Grove, 36.628, -121.9253 6, 30m, 7.xi.53 [AP163, 1♂, AMNH], W Ivie 1.ix.37 [AP274, 1juv, AMNH], 16.viii.31 [AP472, 1♀, 6juv, AMNH]; Palo Colorado Rd, 1.4km E Hwy 1, near Rocky Point, 36.3997, -121.8914 1, 105m, J Bond, A Stockman, D Beamer 17.iii.05 [MY3057, 3060, 2♀, AUMNH]; Pebble Beach, 36.5688, -121.9478 6, 25m, W Icenogle 1.vi.74 [AP291, 1♀, AMNH]; Sycamore Canyon Rd ~0.72km W jct HWY 1, 36.2418, -121.7841 1, 104m, J Bond 7.xii.05 [MY3452-54, 2♀ 1juv, AUMNH]; Viejo Rd, 36.5778, -121.90076 5, 138m, W Icenogle 1.vi.74 [AP197, 1♀, 3juv, CAS].

Variation, males (5). Cl 5.81-7.50, 6.30 ± 0.31; Cw 5.00-6.19, 5.34 ± 0.22; STRl 3.20-4.19, 3.49 ± 0.18; STRw 2.70-3.27, 2.90 ± 0.1; LBw 0.85-1.02, 0.94 ± 0.04; LBl 0.43-0.63, 0.56 ± 0.04; leg I: 5.25-6.44, 5.58 ± 0.22; 3.50-4.25, 3.73 ± 0.14; 3.65-4.44, 3.91 ± 0.15; 2.25-2.61, 2.34 ± 0.07; 1.75-2.55, 2.25 ± 0.14; leg IV: 5.06-6.25, 5.43 ± 0.28; 2.50-3.13, 2.81 ± 0.13; PTl 2.51-3.00, 2.72 ± 0.08; PTw 0.76-1.02, 0.89 ± 0.04; Bl 1.19-1.49, 1.32 ± 0.05; TSp 3-6, 4.20 ± 0.58; TSr 3-5, 4.20 ± 0.37; TSrd 4-5, 4.40 ± 0.24.

Variation, females (5). Cl 6.69-8.96, 7.55 ± 0.45; Cw 5.31-8.16, 6.50 ± 0.53; STRl 3.75-5.70, 4.41 ± 0.39; STRw 3.12-4.75, 3.70 ± 0.33; LBw 1.07-1.55, 1.31 ± 0.1; LBl 0.71-1.19, 0.93 ± 0.08; Leg I: 14.56-20.94, 17.27 ± 1.32; ANTd 6-8, 7.20 ± 0.37; PTLs 14-17, 15.00 ± 0.55; TBs 2-5, 3.00 ± 0.55.

GenBank accessions.

16S-tRNAval-12S: EU569940-EU569958, EU569991, JX103243-JX103249; 18S (partial)-ITS1-5.8S-ITS2: EU569880-EU569883.

Distribution and natural history.

Aptostichus angelinajolieae is restricted in distribution to the Santa Lucia Range of Monterey County (Map 6), bounded to the east by the Salinas River Valley (SRV). The ecoregion is characterized as California Coastal Chaparral Forest and Shrub. As discussed in Bond and Stockman (2008) the DM (Map 7) predicts the areas with the highest probability of occurrence in the regions east of the SRV, with the valley likely serving as a barrier to dispersal. The few male specimens known were collected during the late fall through winter months ( October–December, February), with one specimen collected in July that molted to the final adult stage a month later in August. Female specimens are frequently found on shaded, damp steep banks and road cuts throughout the region. Burrows are generally shallow comprising a white silken lined retreat, covered by a thin silk-soil trapdoor.

Conservation status.

The conservation status of Aptostichus angelinajolieae is likely classified as secure because it is widespread, abundant, and appears to thrive in moderately developed residential areas.

Species concept applied.

Cohesion. Aptostichus angelinajolieae is considered a cohesion species on the basis of it exclusivity as a lineage in DNA studies and lack of genetic exchangeability (gene flow) with other Atomarius Sibling Species Complex lineages as a consequence of the SRV barrier to gene flow.