Lohmann, 1896
Trunk up to 2.5 mm long (Oikopleura intermedia). Postcardial caecum arising dorso-genitally, describing a wide bend. Wide bay between the genital parts of left and right lobes of the stomach. Rectum extending beyond the oral wall of the stomach. Gonads arising between the stomach lobes, later surpassing them genitally and laterally. Tail musculature broad.