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A Guide to Common Singapore Spiders
by Joseph K H Koh
  Mangrove Big-Jawed Spider
Tetragnatha josephi Okuma 1988
 
close-up of female
Female

close-up of male showing palps
Male: note the swollen palps
Members of this family build delicate orb-webs with open hubs. The webs are suspended horizontally or in an inclined plane.

Members of the species Tetragnatha are stick-like spiders with long legs and well-developed jaws.

The male jaws are particularly elongated and are equipped with a spur each. These are instrumental in locking the jaws of the female during mating.


Most Tetragnatha spiders appear superficially similar. They can, however, be identified by examining the arrangement of teeth on the jaws.
Classification: Family Tetragnathidae, Big-Jawed Spiders.
Habitat: Mangrove swamps.
Female: 6.5-10 mm.
Male: 5.5-6 mm.
Distribution:
Singapore.
diagram of jaw T. josephi female's left jaw, lower view









diagram of jaw

T. josephi
male's left jaw,
upper view
  From "A Guide to Common Singapore Spiders" by Joseph K. H. Koh
BP Guide to Nature Series published by the Singapore Science Centre and sponsored by British Petroleum
© 2000 Joseph K H Koh