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Species Neoscona oaxacensis - Western Spotted Orbweaver

Neoscona oaxacensis? - Neoscona oaxacensis Big Black Spider on Leaf - Neoscona oaxacensis Pale Neoscona  - Neoscona oaxacensis - male - female spider - Neoscona oaxacensis Gray Orb Weaver - Neoscona oaxacensis Spider brown on Sunflower at Lincoln Point, Utah County Utah - Neoscona oaxacensis - female California Spider ID request - Neoscona oaxacensis Neoscona oaxacensis - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Araneidae (Orb Weavers)
Genus Neoscona (Spotted Orbweavers)
Species oaxacensis (Western Spotted Orbweaver)
Synonyms and other taxonomic changes
Explanation of Names
Neoscona oaxacensis Keyserling 1864
Size
Female 11-17 mm
Male 5-12 mm (1)
Range
w US (CA-TX-KS-WA) (+IN & RI?)
Remarks
You can separate N. arabesca from oaxacensis by the three pairs of dorsal, slanting, dark spots found on arabesca.
See Also

A ventral view will separate the two in a heartbeat. See A. packardi compared to N. oaxacensis:

A. packardi has 5 white dorsal marks while N. oaxacensis has more than 5. Also A. packardi has a dark band in the middle of the tibiae while N. oaxacensis' tibiae are light in the center. Compare:

The second white mark on A. packardi is longer than the second white mark on N. oaxacensis. Compare dorsals here:

A. packardi tends to have long white hairs coming off the abdomen. This can be helpful when separating juveniles. The legs of juveniles are also quite different with N. oaxacensis being less banded and having a visible central line on the carapace. Compare:

N. oaxacensis has a row of dots across the front of the abdomen in many cases.
Works Cited
1.How to Know the Spiders
B. J. Kaston. 1978. WCB/McGraw-Hill.