Immergentia zelandica Silén, 1946

The zoids are very irregularly placed. Their mostly numerous, thread-like processes are extremely thin and form a network.

The length of the zoid averages 0.31 mm, its breadth 0.08 mm. The abanal part of its proximal end forms a distinct, fingershaped but short projection within which the proximal end of the retractor muscle is fixed. The number of the tentacles is 9.