It has been assumed that the eyes were all compound, like other arthropods' lateral eyes,[2] but this reconstruction, which is not backed up by any evidence,[2] is "somewhat fanciful".[20] The mouth was under the head, behind the proboscis, and pointed backwards, so that the digestive tract formed a U-bend on its way towards the rear of the animal. The proboscis appeared sufficiently long and flexible to reach the mouth.[2]