By contrast , members of the Entelegynae have evolved extremely elaborate palpal bulbs , with multiple complexly shaped sclerites .
In some groups of spiders ( e.g. Segestrioides species ) the bulb is reduced to a single pear - shaped structure .
Members of the Entelegynae have evolved extremely elaborate palpal bulbs , with multiple complexly shaped sclerites .
In some groups of spiders ( e.g. Segestrioides species ) the bulb is reduced to a single pear - shaped structure .