 The respiratory system and circulatory system consist of a single left bipectinate ctenidium (gill), which is very large (15.5 % of the body volume), and is supported by extensive blood sinuses filled with haemocoel. On dissection, the blood sinuses and lumps of haemocoel material are a prominent feature throughout the body cavity. There are thin gill filaments on either side of the ctenidium. The bipectinate ctenidium extends far behind the heart into the upper shell whorls; it is much larger than in Peltospira. Although this species has a similar shell shape and general form to other peltospirids, the ctenidium is proportional size to that of Hirtopelta, which has the largest gill among peltospirid genera that have been investigated anatomically so far.
