Turbocavus is diagnosed from all other Serpulidae genera by its thoracic chaetae, each one of which has a plicate or multifolded base and a grooved shaft that extends to a capillary tip (Fig. 2 B−F). This chaetal structure has not been reported for any polychaete species. In addition, there is a variable number of thoracic chaetigers (7 to 19) (Fig. 2 G, H). While other genera (e.g. Filograna and Spiraserpula) also have a variable number of thoracic chaetigers, none have been reported to have more than 14 in total. Turbocavus also has an unusually high number of abdominal chaetigers (up to 335) in comparison to other genera, including Spirobranchus (reported to sometimes having over 200 abdominal chaetigers). Furthermore, Turbocavus lacks an operculum, special collar chaetae or Apomatus chaetae. The 18S rRNA genetic sequences obtained for the Turbocavus genus are distinguished from the closest neighbor of other sequenced genera (Table 1) by the intergeneric genetic distance of 10.5−12.9%.