Complex sentence: Interestingly, spiders from Australia mostly construct their decorations in a vertical line above and below the centre of the web (hub), whereas those from Papua New Guinea construct the characteristic "X" shape of St Andrew's Cross spiders.
Split into simpler sentences: Interestingly, spiders from Australia mostly construct their decorations in a vertical line above and below the centre of the web (hub). Whereas, those from Papua New Guinea construct the characteristic "X" shape of St Andrew's Cross spiders.