David Element
Wildlife
Photography and Digital Video Images
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Bugs
23 - Tortoise Bugs
TORTOISE
SHIELDBUG Eurygaster testitudinaria
SCARCE TORTOISE SHIELDBUG Eurygaster maura
- These
very similar species are most readily separated by the use of
entomological keys, the best of which has been produced by Graham Collins
for use in Roger Hawkins' excellent 'Shieldbugs of Surrey'.
The most visible differences are in the shape of the central lobes of the
head (note the central groove visible in the first photograph of Eurygaster testitudinaria
that ends in a slight concavity in this species but not in E. maura).
There are also subtle differences in the lengths of their second antennal
segments relative to those of the third (slightly longer relative to the
third segment in E. maura) but these are difficult details to
see without significant magnification and closer examination of the
reproductive organs by expert heteropterists may
be needed to clinch an identification to species.
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Bugs 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50
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Names
-> Species Index,
Scientific Names
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