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A Tetragnathidae (Plesiometa argyra) 102208
 The
photo on the right was taken by Alison
M., an undergraduate student in Katy, Texas. She wrote:
"Hello, Jerry. I have another unidentified spider
for you. Its web was very intricate, atypical, and very close to the
ground. I could only get a ventral photo of it." This spider, in
the family Tetragnathidae (the long-jawed orbweavers) is the same size
as, and is similar to, another member of this family, the orchard orbweaver (Leucauge venusta). But spiders in the genus
Leucauge have a pair of triangular areas at the female venter that
are absent in Plesiometa, and the latter's venter is flanked
instead with two longitudinal bands, as with Alison's specimen (see
Ubick et al, [2005], pg. 232-233 for additional details.)
Plesiometa argyra is the best known species in this genus; for
years, in fact, the genus was thought to contain but this one species.
Other species have since been discovered in South
America.
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Jerry Cates. Questions? Corrections? Comments?
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