Animals about 1 mm long, with a tail. Body colour green or pinkish. The eyes have a pink appearance under reflective light and purple under transmissive light. Body pigmentation in the anterior body part, pink under reflective light and purple under transmissive light. Zoochlorellae sometimes present. Male copulatory organ of the duplex-type IIB. Proximal part of the invaginated cirrus with a pseudocuticula, the distal part of the invaginated cirrus bearing spines. Evaginated copulatory organ with a bulge, which is also visible on the distal part of the invaginated ejaculatory duct. Female genital system of the AGLOBULATA-type, with a long female genital canal, which has giant unicellular glands at its proximal part and at the junction between the female genital canal and the superior genital atrium. With a small genito-bursal duct, a lobed intestinal bursa, and a burso-intestinal duct with a valvular complex at the proximal end.[From Houben AM, Van Steenkiste N, Artois TJ (2014): 329-330]
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