Aptostichus simus (Bond, Jason E. 2012)
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Ordo: Araneae
Familia: Cyrtaucheniidae
Genus: Aptostichus
Name
Aptostichus simus Bond, Jason E., 2012 – Wikispecies link – Pensoft Profile
- Aptostichus simus Bond, Jason E., 2012, ZooKeys 252: 133-137.
Diagnosis
Diagnosis. Males of Aptostichus simus can be distinguished from species in the Simus species group by having a serrated embolus (Figs 50, 277) and lacking both elongate ventral tibia I spines and ventral tarsal spines (Figs 275, 276, 279). Females can be easily recognized by having a very large (> 150), sharply delineated patch of endite cuspules (Fig. 39, 283). The species is the only member of the Simus group that has been collected from coastal dune habitat.
Description
Descriptions. Described by Chamberlin (1917: 36).
Distribution
Distribution and natural history. Like Aptostichus stephencolberti and Aptostichus miwok, Aptostichus simus is distributed throughout the California coastal dune habitats. Specimens are known from Baja California Norte, northward along beaches in San Diego, Orange, Los Angeles, Ventura, Santa Barbara, and San Luis Obispo Counties; their distribution ends just north of Point Conception with two disjunct populations in Monterey County and on the Channel Islands just off the California coast (Map 32). Like other coastal dune species, Aptostichus simus is found in relatively deep burrows on the steep faces of sand dunes and at the base of coastal vegetation. Burrows comprise a thick silk lining and are covered by a very cryptic trapdoor constructed of silk and sand. Dune habitats disturbed by high concentrations of the invasive Carpobrotus edulis (ice plant) tend to lack Aptostichus simus.
Taxon Treatment
- Bond, Jason E.; 2012: Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae) ZooKeys, 252: 133-137. doi
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