Trunkelongate, up to 2.5 mm long (Fritillaria megachile). Mouth with upper lip leaf-shaped. Digestive tract axis longitudinal. Testis cylindrical and elongate, behind one spherical to short-cylindrical ovary. Tail musculature narrow. Two flat amphichordal cells, touching one another, on each side of the chorda.
Kingdom Animalia Phylum Chordata Subphylum Urochordata Class Appendicularia Family Fritillaridae Subfamily Fritillarinae Genus Fritillaria Subgenus Eurycercus Species Fritillaria megachile