(Chamisso, 1819)
Solitary zooids: up to 74 mm long (Cyclosalpa affinis). Body muscles continuous dorsally, except MI and MII. Intermediate muscle continuous ventrally. Total number of muscular fibers (MI-MVII): 93-135. Light organs absent. Dorsal tubercle strongly convoluted.
Aggregate zooids: up to 46 mm long (Cyclosalpa affinis 1). Body muscles dorsally free. Total number of muscular fibers: 41-57. Light organs absent. Dorsal tubercle moderately convoluted.