Figure 2

Measurements taken from the images of Terranova-like larvae. The oesophagus length is taken along the midline from the start of the oesophagus (i. e. slightly sub-terminally in the roundworm) to the ventricle. The caecum length was measured from the aperture into the ventricle to the caecum end. The tail length represents the distance along the midline, from the level of the anus/cloaca to the posterior end. Figure 2 was created in Adobe Photoshop 23.5.0 (https://www.adobe.com/photoshop).