Song & Wilbert (2000a: 215, figs 3, 7B)
In vivo c. 50–70 × 15–25 µm. Body fusiform, anteriorly pointed, posteriorly narrowly rounded; oral area in anterior two-thirds of body, slightly indented. Somatic kineties 14–18; caudal cilium 1, c. half as long as body. Adoral membranelles 3, close together; membranelle 1 longest, slightly oblique, composed of 3 rows of kinetosomes; membranelles 2 and 3 short; paroral membrane very long. Scutica composed of a short row of kinetosomes. Macronuclear nodules 1–6; micronucleus 1. Contractile vacuole terminal.
Weddell Sea (Song & Wilbert, 2000a).