Scleroperalia with one pair of apicalia and 4 pairs of long (50-60 µm) compound bristles of which the ventralia originate equally from or closer to the dorsalia than to the rostalia. Ciliary pits lacking. With an unpaired prepharyngeal gland. Epidermal cells in stripes of 2-3, epidermal inclusions often in groups. Male stylet of the rod type. Sperm small, droplet-shaped. Basal plate broad; jaws rather lamellar but not closed, with a cauda; teeth long, arranged in a ventro-rostro-dorsal basket. Without a jugum. Without ability to swim backwards.
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