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English (UK) 
Classe Gastropoda Cuvier, 1795
Sottoclasse Caenogastropoda Cox, 1960
Ordine Littorinimorpha Golikov & Starobogatov, 1975
Superfamiglia Truncatelloidea Gray, 1840
Famiglia Vitrinellidae Bush, 1897
Sottofamiglia Circulinae Fretter & Graham, 1962
Genere Circulus Jeffreys, 1865
Circulus novemcarinatus (Melvill, 1906) - 3 - 4
Circulus octoliratus (Carpenter, 1856) - 2 - 4
Circulus striatus (Philippi, 1836)
Circulus tricarinatus (Wood S.V., 1848)vedi Circulus striatus - 1
1 | OLIVER J.D. & ROLAN E. The family Tornidae (Gastropoda, Rissooidea) in the East Atlantic, 2. Circulinae, Iberus 29 (1) 9–33 (2011) |
| 2 | OVALIS & MIFSUD. Circulus octoliratus (Carpenter, 1856) and Phosinella digera (Laseron, 1956): two new non-indigenous gastropod species for the Mediterranean Sea Circulus octoliratus (Carpenter, 1856) y Phosinella digera (Laseron, 1956): dos nuevas especies de gasteropodos no indigenas del mar Mediterraneo. Iberus, 37 (2): 267-270, 2019. |
| 3 | Öztürk B., Recevik M. & Geyran K. (2015). New alien Molluscs in the Mediterranean Sea. Cahiers de Biologie Marine. 56(3):205-212. |
| 4 | Öztürk, B., Bitlis, B., & Türkçü, N. (2023). Circulus (Mollusca-Gastropoda) species of the Turkish coasts with a note on the presence of Circulus octoliratus (Carpenter, 1856). Ege Journal of Fisheries and Aquatic Sciences, 40(1), 77-80. https://doi.org/10.12714/egejfas.40.1.11 |