Saturday, August 11, 2012

Decorative Silver Orb Spider (Leucauge decorata)


Photos in this post were taken in Bengkulu Sumatra Indonesia. This spider is from the family of Tetragnathidae under genus of Leucauge . The scientific name for this spider is Leucauge decorata (Walckenaer, 1841). Just like in the photo above, at its web, this spider always stays upside down.




This spider has silver marks at the upperside of its abdomen and silver stripes at the side of the abdomen.  Under the abdomen the color is greenish silver. The chepalothorax is translucent white with green stripes along the center and border of chepalothorax. It has six eyes.
The abdomen is slender and has two black slight humps in front. It has extended abdomen like a blunt tail beyond the spinnerets. The extended abdomen is bended upward if we see from the side. The legs are translucent green with some black and yellow rings near the legs joint segments. The two front leg pairs are much longer than the others. They are about more than twice longer then body length. The size of body without legs is about 15mm. The venom of this kind of spider is considered not harmful to human.

Taxonomy: 
Phylum : Arthropoda - Arthropods
Class : Arachnida - Arachnids
Order : Araneae - Spiders
Infraorder : Araneomorphae - True Spiders
No Taxon : Entelegynes
Family : Tetragnathidae - Long-jawed Orb Weavers
Genus : Leucauge
Species : L.decorata
Binomial name : Leucauge decorata (Walckenaer, 1841)

References: 
http://habitatnews.nus.edu.sg/guidebooks/spiders/text/Leucauge_decorata.htm
http://www.arachne.org.au/01_cms/details.asp?ID=2532

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