Complex sentence: Many members of the Mygalomorphae and the Haplogyne have then evolved less complex palpal bulbs, in some cases (e.g. "Segestrioides" species) the bulb is reduced to a single pear-shaped structure.
Split into simpler sentences: Many members of the Mygalomorphae and the Haplogyne have then evolved less complex palpal bulbs. In some cases (e.g. "Segestrioides" species) the bulb is reduced to a single pear-shaped structure.