Mid-ventral sentence example
- The mouth lies usually in the centre of the anterior vzs and sub-terminal sucker or between two adoral suckers, but in Gasterostomum and its allies it is mid-ventral.
- Should it, however, encounter another Diporpa, the mid-ventral sucker of either is applied to the dorsal papilla of the other, and complete fusion takes place across the junction.
- The oral sucker may alone be present (Monostomidae), more usually a second is developed on the under surface, but may be mid-ventral (Distomidae) or terminal.
- This is facilitated by an important general change in the position of the parapodia; their basal attachments are all more ventral in position than in the Chaetopoda, and tend to approach from the two sides towards the mid-ventral line.