- External morphology
secondary oral groove. 35 mm x 21 mm.
Discovered by occlupanologist EF Lipton, D. vugada is one of the more puzzling of the occlupanids. The function of the secondary oral groove remains a mystery. Some researchers think it could be analogous to many fish with eyespots on their tails, but nobody seems to know what predator D. vugada would be trying to avoid.