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Species Micrathena gracilis - Spined Micrathena

Micrathena sp. - Micrathena gracilis Spikey Tree Spider Aug 08 - Micrathena gracilis - female Spined Micrathena - Micrathena gracilis Micrathena gracilis - Spined Micrathena - Micrathena gracilis - female Micrathena ...  - Micrathena gracilis - female Is this a spiny backed orb weaver? - Micrathena gracilis Micrathena gracilis - female Brown  Spined Micrathena (Micrathena gracilis)? - Micrathena gracilis - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynes )
Family Araneidae (Orb Weavers)
Genus Micrathena
Species gracilis (Spined Micrathena)
Explanation of Names
Latin: "slender, slight"
Size
Females 8 - 10 mm, males average 4.5 mm.
One specimen (a female) from Durham, North Carolina, 30 July, measured 11 mm from head to tip of abdomen.
Identification
Females are mostly white or pale yellow, mottled with black or brown. They have ten spines on the chunky abdomen. Size 8 - 10 mm.


Males are flat with an elongated yellowish or white abdomen. They lack all but one or two abdominal spines and are smaller than females, averaging 4.5mm in size.