ምንም እንኳን ፕሮቦሲሲው የጂምናስፔርሞችን የስኳር ብናኝ ጠብታዎች (በተጠቀሰው ጊዜ በጣም የተለመደ የዕፅዋት ዓይነት) እንዲጨምሩ ሊረዳቸው ይችል የነበረ ቢሆንም ፣ የእነዚህ ነፍሳት ዝግመተ ለውጥ ላይ አሁን ያሉት ጽንሰ -ሐሳቦች አይመስሉም።
Though it might be suggested that the proboscis could have helped them lap up the sugary pollination drops of gymnosperms (a type of plant that was extremely common at the alleged time), it seems that the present theories on the evolution of these insects appears not to be properly adequate.