Type of oesophagus, where oesophagus is dorsally lobed is

Type of oesophagus, where oesophagus is dorsally lobed is Hoplolaimus type.
There is an extensive rostrum at the front of the esophagus in all carnivorous snails and slugs. In the freshwater snail species Tarebia granifera, the brood pouch is above the esophagus.
They have a non-muscular or weakly muscled oesophagus. An oesophageal bulb is a specialization and an undifferentiated, gradually enlarging oesophagus more likely represents the primitive type.