Linked from
The 18 pages that link to Proboscis, each with the reason it gives.
LepidopteraRelated: Many adult lepidopterans use a coiled proboscis to drink liquid food.
HeteropteraRelated: Heteropterans use a segmented proboscis to pierce tissues and draw fluids.
MothRelated: Many adult moths use a coiled proboscis to drink nectar or other fluids.
NectarivoryRelated: Some nectarivores use elongated feeding organs to reach nectar in deep flowers.
AnophelesRelated: Female Anopheles use this mouthpart to pierce skin and take blood.
Sea spiderRelated: Sea spiders use this tube-like structure to take in food.
SphingidaeRelated: Many sphingids use a long proboscis to reach nectar in deep flowers.
OttoiaRelated: Ottoia used its retractable proboscis to probe sediment and capture prey.
PlatybelodonRelated: The trunk could have worked with the lower tusks during food handling.