Aptostichus stephencolberti (Bond, Jason E. 2012)
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Ordo: Araneae
Familia: Cyrtaucheniidae
Genus: Aptostichus
Name
Aptostichus stephencolberti Bond, Jason E., 2012 – Wikispecies link – Pensoft Profile
- Aptostichus stephencolberti Bond, Jason E., 2012, ZooKeys 252: 38-43.
Diagnosis
Diagnosis. Individuals of this species are difficult to distinguish from other Atomarius Sibling Species Complex members on the basis of morphological features (Figs 82-90) alone but can be diagnosed on the basis of a set of unique mtDNA site substitutions (see Bond and Stockman 2008). The species is restricted in distribution to the coastal dune habitats of Monterey, Santa Cruz, San Mateo, and San Francisco Counties (California; Maps 4, 5) and is much lighter in coloration (Figs 88-90) than species found in inland habitats (e.g., Aptostichus atomarius, Aptostichus angelinajolieae, and Aptostichus stanfordianus).
Description
Descriptions. Described by Bond (2008).
Distribution
Distribution and natural history. Aptostichus stephencolberti is distributed throughout the coastal dune habitats of San Francisco, San Mateo, Santa Cruz, and Monterey Counties with a single population recorded from San Luis Obispo County (Map 4). Individuals are 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 stephencolberti individuals entirely. The DM for this species (Map 5) follows closely with the known distribution to include the southernmost-recorded locality for the species. Wandering males (2) have been collected in August and September; two males have been collected from burrows in January.
Taxon Treatment
- Bond, Jason E.; 2012: Phylogenetic treatment and taxonomic revision of the trapdoor spider genus Aptostichus Simon (Araneae, Mygalomorphae, Euctenizidae) ZooKeys, 252: 38-43. doi
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