Dodatak:Popis potkovnjaka, P
Phoronis Wright, 1856 (8 sp.) uredi
- Phoronis australis Haswell, 1883
- Phoronis emigi Hirose, Fukiage, Katoh & Kajihara, 2014
- Phoronis hippocrepia Wright, 1856
- Phoronis ijimai Oka, 1897
- Phoronis muelleri Selys-Lonchamps, 1903
- Phoronis ovalis Wright, 1856
- Phoronis pallida Silén, 1952
- Phoronis psammophila Cori, 1889
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Phoronis hippocrepia simio Maria Grazia Montanucci u pličaku u Italiji
Phoronopsis Gilchrist, 1907 uredi
- Phoronopsis albomaculata Gilchrist, 1907
- Phoronopsis californica Hilton, 1930
- Phoronopsis harmeri Pixell, 1912