Trunk flattened, up to 1.2 mm long (Fritillaria fraudax). Mouth with 2 lateral lobes. Spiracles oval and large. Axis of the alimentary tract transverse. Testisclasp- to basket-shaped, surrounded by 2 cord-like ovaries.
Kingdom Animalia Phylum Chordata Subphylum Urochordata Class Appendicularia Family Fritillaridae Subfamily Fritillarinae Genus Fritillaria Subgenus Acrocercus Species Fritillaria fraudax