David Element

Wildlife Photography

and Digital Video Images

________________________ Bugs 23 - Tortoise Bugs

                                              TORTOISE BUG Eurygaster testitudinaria

                                                     TORTOISE BUG 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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