Heterosaccus
Heterosaccus is a genus of barnacles in infraclass Rhizocephala. Like other taxa in this group, they parasitize crabs. Geoffroy Smith circumscribed the genus in 1906; he initially only included H. hians. Smith circumscribed a genus distinct from Sacculina due to a difference of the mesentery; in Heterosaccus, the mesentery does not stretch down to the mantle opening but rather only is present on the ring of attachment.
Species
, WoRMS recognizes the following fifteen species.| Binominal name | Author citation | Type host | Type locality | Ref |
| Heterosaccus californicus | Boschma, 1933 | "Pugettia producta" | "Santa Cruz, California" | |
| Heterosaccus distortus | Boschma, 1933 | "Schizophrys aspera" | "vicinity of Jolo," Philippines | |
| Heterosaccus dollfusi | Boschma, 1960 | "Charybdis hoplites" | "Gulf of Suez" | |
| Heterosaccus gongylus | Boschma, 1962 | Pleistacantha moseleyi | Andaman Sea | apud |
| Heterosaccus hians | "Thalamita sp. aff. callianassae" | "Java" | ||
| Heterosaccus indicus | Boschma, 1957 | "Portunus pelagicus" | Mandapam Camp, Tamil Nadu | apud |
| Heterosaccus lunatus | Phillips, 1978 | "Charybdis callianassa" | "Moreton Bay," Queensland | |
| Heterosaccus multilacinensis | Phillips, 1978 | "Charybdis truncata" | "East Moreton Bay," Queensland | |
| Heterosaccus occidentalis | "Mithrax forceps" | "Deadman's Bay, west coast of Florida" | ||
| Heterosaccus papillosus | "Charybdis bimaculatus" | "vicinity of Marindugue Island, Philippine Islands" | ||
| Heterosaccus pellucidus | Shiino, 1943 | "Thalamita integra integra" | Japan | apud |
| Heterosaccus ruginosus | Boschma, 1931 | "Thalamita prymna" | "Singapore, coral reef" | |
| Heterosaccus setoensis | Shiino, 1943 | "Thalamita wakensis" | Seto Inland Sea | apud |
| Heterosaccus sibogae | Boschma, 1931 | "Thalamita admeta" | "Siau Reef", Indonesia | |
| Heterosaccus tesselatus | "Mithrax ruber" | "Caracas Bay, Curaçao" |