Tetracanthus
Tetracanthus
**Tetracanthus** (Greek "four spines") is an epithet for several different species:

* *[Nandopsis tetracanthus](/wiki/Nandopsis_tetracanthus "Nandopsis tetracanthus")*, a fish in the genus *[Nandopsis](/wiki/Nandopsis "Nandopsis")*
* *[Neolamprologus tetracanthus](/wiki/Neolamprologus_tetracanthus "Neolamprologus tetracanthus")*, a fish
* *[Scatophagus tetracanthus](/wiki/Scatophagus_tetracanthus "Scatophagus tetracanthus")*, a fish in the genus *[Scatophagus](/wiki/Scatophagus "Scatophagus")*
* *[Zelus tetracanthus](/wiki/Zelus_tetracanthus "Zelus tetracanthus")*, an insect in the genus *[Zelus](/wiki/Zelus_%28bug%29 "Zelus (bug)")*
* *[Echinocactus tetracanthus](/wiki/Echinocactus_tetracanthus "Echinocactus tetracanthus")*, synonym of *[Parodia erinacea](/wiki/Parodia_erinacea "Parodia erinacea")*, a cactus in the genus *[Parodia](/wiki/Parodia "Parodia")*


How many different species have the epithet 'Tetracanthus'?