Circulus is a genus of very small and minute sea snails with an operculum, marine gastropod mollusks in the family Vitrinellidae.MolluscaBase eds. (2020). MolluscaBase. Circulus Jeffreys, 1865. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=137626 on 15 August 2020
Species According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus CirculusWoRMS : Circulus; accessed : 11 July 2011
Circulus abruptus Rubio & Rolán, 2022 Circulus acuteliratus (Thiele, 1925) Circulus adrianrubioi Rubio & Rolán, 2022 Circulus aemilii Rubio & Gofas, 2024 Circulus aequatorialis (Thiele, 1925) Circulus alcocerae Rubio & Rolán, 2022 Circulus andreae Rubio & Rolán, 2022 Circulus andreiasalvadorae Rubio & Rolán, 2022 Circulus angulatus (A. Adams, 1850) Circulus antoniae Rubio & Rolán, 2022 Circulus asperRubio & Rolán, 2022 Circulus austerus Rubio & Rolán, 2022 Circulus australesensisRubio & Rolán, 2022 Circulus aximicrostriatus Rubio & Rolán, 2022 Circulus basislevis Rubio & Rolán, 2022 † Circulus bicarinatus (Lamarck, 1804) Circulus binodular Rubio & Rolán, 2022 Circulus biporcatus (A. Adams, 1863) † Circulus bonneti (Cossmann, 1907) Circulus boucheti Rubio & Rolán, 2022 Circulus cachoi Rubio & Rolán, 2022 Circulus caledonicus Rubio & Rolán, 2022 Circulus carinamagna Rubio & Rolán, 2022 Circulus carmensalasae Rubio & Rolán, 2022 Circulus catenatus Rubio & Rolán, 2022 Circulus chefyae Rubio & Rolán, 2022 Circulus choshiensis (Habe, 1961) Circulus cinguliferus (A. Adams, 1850) Circulus colluvius Rubio & Rolán, 2022 Circulus communis Rubio & Rolán, 2022 Circulus congoensis (Thiele, 1925) Circulus convexstriatus Rubio & Rolán, 2022 Circulus convexus Rubio & Rolán, 2022 Circulus coronatus Rubio & Rolán, 2022 Circulus cosmius Bartsch, 1907 Circulus cuatricarinatus Rubio & Rolán, 2022 Circulus cultrorum Rubio & Rolán, 2022 Circulus cumtectum Rubio & Rolán, 2022 Circulus cycloma (Barnard, 1964) Circulus davidruedai Rubio & Rolán, 2022 Circulus decemcords Rubio & Rolán, 2022 Circulus delectabilis (Tate, 1899) Circulus delicatus Rubio & Rolán, 2022 Circulus depressus Rubio & Rolán, 2022 Circulus deprinsi Rolán & Swinnen, 2013 Circulus diaphanus (Finlay, 1924) Circulus discordant Rubio & Rolán, 2022 Circulus discretus Rubio & Rolán, 2022 Circulus dispersus Rubio & Rolán, 2022 † Circulus duplicarinus (Marwick, 1929) Circulus duplicatus (Lischke, 1872) † Circulus edomitus (Marwick, 1931) Circulus ellenstrongae Rubio & Rolán, 2022 † Circulus enaulus Lozouet, 1998 † Circulus estotensis Lozouet, 1998 Circulus euchilopteron (Melvill & Standen, 1903) Circulus excellent Rubio & Rolán, 2022 Circulus exempli Rubio & Rolán, 2022 Circulus extensus Rubio & Rolán, 2022 Circulus fijiensis Rubio & Rolán, 2022 Circulus fininspicor Rubio & Rolán, 2022 Circulus fundatus Rubio & Rolán, 2022 Circulus gofasi Rubio & Rolán, 2022 Circulus gracilis Rubio & Rolán, 2022 † Circulus grignonensis (Deshayes, 1864) Circulus gyalum (Melvill, 1904) Circulus harriettae (Petterd, 1884) Circulus harrietwoodae Rubio & Rolán, 2022 Circulus hasegawai Rubio & Rolán, 2022 † Circulus helicoides (Hutton, 1877) Circulus horroi Rubio & Rolán, 2022 Circulus inchoatus Rubio & Rolán, 2022 Circulus inesae Rubio & Rolán, 2022 † Circulus inornatus P. Marshall, 1919 † Circulus intermedius (Deshayes, 1862) Circulus irregularis Rubio & Rolán, 2022 Circulus iustus Rubio & Rolán, 2022 Circulus juanmai Rubio & Rolán, 2022 Circulus juantrigoi Rubio & Rolán, 2022 Circulus julioalvarezi Rubio & Rolán, 2022 Circulus laevis (Kiener, 1838) Circulus lenticularis Rubio & Rolán, 2022 Circulus letourneuxi Rubio & Rolán, 2022 Circulus liratus (A. E. Verrill, 1882) Circulus liricinctus (Garrett, 1873) Circulus loyaltiensis Rubio & Rolán, 2022 Circulus luciae Rubio & Rolán, 2022 † Circulus lucidus (Cossmann, 1881) Circulus luquei Rubio & Rolán, 2022 Circulus madagascarensis Rubio & Rolán, 2022 Circulus maestrati Rubio & Rolán, 2022 Circulus marchei (Jousseaume, 1872) Circulus marcosi Rubio & Rolán, 2022 Circulus maricarmenae Rubio & Rolán, 2022 Circulus marquesasensis Rubio & Rolán, 2022 Circulus mayottensis Rubio & Rolán, 2022 † Circulus megalomphalus (Cossmann, 1919) † Circulus michaudi (Deshayes, 1862) Circulus microbliquus Rubio & Rolán, 2022 Circulus microlines Rubio & Rolán, 2022 Circulus micronodular Rubio & Rolán, 2022 Circulus microradiatus Rubio & Rolán, 2022 Circulus microsculpturatus Oliver & Rolán, 2011 Circulus microspiralis Rubio & Rolán, 2022 Circulus microstriatus Rubio & Rolán, 2022 Circulus microtuberculatus Rubio & Rolán, 2022 Circulus minituber Rubio & Rolán, 2022 Circulus minutispiralis Rubio & Rolán, 2022 † Circulus mitis (Deshayes, 1862) Circulus modestus (Gould, 1859) Circulus monocoronatus Rubio & Rolán, 2022 Circulus monteiroi Rubio & Rolán, 2022 Circulus mortoni Ponder, 1994 Circulus mozambiquensis Rubio & Rolán, 2022 Circulus multicordatus Rubio & Rolán, 2022 Circulus multiradiatus Rubio & Rolán, 2022 Circulus multistriatus Rubio & Rolán, 2022 Circulus murilloi Rubio & Rolán, 2022 Circulus nimis Rubio & Rolán, 2022 † Circulus nitidus (Deshayes, 1862) Circulus novemcarinatus (Melvill, 1906) Circulus novemlicium Rubio & Rolán, 2022 Circulus obesus Rubio & Rolán, 2022 Circulus octoliratus (Carpenter, 1856) Circulus oliveri Rubio & Rolán, 2022 Circulus operius Rubio & Rolán, 2022 Circulus orbignyi (P. Fischer, 1857) Circulus ordinatus Rubio & Rolán, 2022 Circulus osfloridum Rubio & Rolán, 2022 Circulus osingens Rubio & Rolán, 2022 Circulus osmagnum Rubio & Rolán, 2022 Circulus pacomartinezi Rubio & Rolán, 2023 Circulus pamilacanensis Rubio & Rolán, 2022 Circulus papuaensis Rubio & Rolán, 2022 Circulus parallelus Rubio & Rolán, 2022 Circulus parcus Rubio & Rolán, 2022 Circulus paucicordatus Rubio & Rolán, 2022 † Circulus paulensis Lozouet, 1998 Circulus pellucidus (E. A. Smith, 1910) Circulus penasi Rubio & Rolán, 2022 Circulus pilartarazonae Rubio & Rolán, 2022 Circulus pinsensis Rubio & Rolán, 2022 Circulus planatus Rubio & Rolán, 2022 † Circulus planorbillus (Dujardin, 1837) Circulus planorbis (Laseron, 1958) † Circulus planorbularis (Deshayes, 1832) Circulus pluripunctus Rubio & Rolán, 2022 Circulus plurispiralis Rubio & Rolán, 2022 † Circulus politus Suter, 1917 (accepted > unreplaced junior homonym, secondary homonym of Circulus politus (Morlet, 1888)) † Circulus politus (Morlet, 1888) Circulus protobrevis Rubio & Rolán, 2022 Circulus prototuber Rubio & Rolán, 2022 Circulus proximus Rubio & Rolán, 2022 Circulus pseudocarinatus Rubio & Rolán, 2022 Circulus pseudopraecedens Adam & Knudsen, 1969 Circulus pudicus Rubio & Rolán, 2022 Circulus punctuslinealis Rubio & Rolán, 2022 Circulus quinoneroi Rubio & Rolán, 2022 Circulus quinquecarinatus (Melvill, 1906) † Circulus rangii (Deshayes, 1862) Circulus retroconvexus Rubio & Rolán, 2022 Circulus reunionensis Rubio & Rolán, 2022 Circulus robustus Rubio & Rolán, 2022 Circulus rolanorum Rubio & Rolán, 2022 Circulus rosapereirae Rubio & Rolán, 2022 Circulus rosenbergi Rubio & Rolán, 2022 Circulus rossellinus Dall, 1919 Circulus rudis Rubio & Rolán, 2022 Circulus rugospiralis Rubio & Rolán, 2022 Circulus rusticulus Rubio & Rolán, 2022 Circulus rusticus Rubio & Rolán, 2022 Circulus ryalli Oliver & Rolán, 2011 Circulus sandrogorii Rubio & Rolán, 2022 Circulus scaber Rubio & Rolán, 2022 Circulus sculptilis (Garrett, 1873) Circulus sculpturatus Rubio & Rolán, 2022 Circulus semisculptus (Olsson & McGinty, 1958) † Circulus semistriatus (Deshayes, 1862) Circulus senegalensis Adam & Knudsen, 1969 Circulus serratus Rubio & Rolán, 2022 Circulus sexangulae Rubio & Rolán, 2022 † Circulus sigaretornuformis Lozouet, 1998 † Circulus similis (Deshayes, 1862) Circulus similiter Rubio & Rolán, 2022 Circulus simongrovei Rubio & Rolán, 2022 † Circulus simplex (Briart & Cornet, 1887) Circulus simpliciter Rubio & Rolán, 2022 Circulus sixcarinatus Rubio & Rolán, 2022 Circulus smithi Bush, 1897 Circulus societyensis Rubio & Rolán, 2022 Circulus solomonensis Rubio & Rolán, 2022 Circulus soyoae (Habe, 1961) Circulus speciosus Rubio & Rolán, 2022 Circulus spiralis Rubio & Rolán, 2022 † Circulus spirorbis (Lamarck, 1804) Circulus stephani Rolán & Ryall, 2002 Circulus striatus (Philippi, 1836) Circulus structus Rubio & Rolán, 2022 Circulus suavis Rubio & Rolán, 2022 † Circulus subcirculus (Cossmann & Peyrot, 1917) † Circulus subedomitus (Laws, 1936) Circulus subradiatus Rubio & Rolán, 2022 Circulus subsuturalis Rubio & Rolán, 2022 Circulus subtatei (Suter, 1907) Circulus sulcatus (A. Adams, 1850) Circulus supranitidus (Wood S., 1848) Circulus susomendezi Rubio & Rolán, 2022 Circulus suspensus Rubio & Rolán, 2022 Circulus suturcaten Rubio & Rolán, 2022 Circulus taiwanensis Rubio & Rolán, 2022 Circulus tatei (Angas, 1879) Circulus templadoi Rubio & Rolán, 2022 † Circulus tenuiliratus (Cossmann, 1915) Circulus tenuiradiatus Rubio & Rolán, 2022 † Circulus tenuistriatus (Deshayes, 1862) Circulus teramachii (Habe, 1958) Circulus texanus (Moore, 1965) Circulus tongaensis Rubio & Rolán, 2022 Circulus transculptus (Laseron, 1958) Circulus troncosoi Rubio & Rolán, 2022 Circulus tuberopertus Rubio & Rolán, 2022 Circulus umbilicordatus Rubio & Rolán, 2022 † Circulus unicarinus (Laws, 1940) Circulus urgorrii Rubio & Rolán, 2022 Circulus valdesculpturatus Rubio & Rolán, 2022 Circulus vanuatuensis Rubio & Rolán, 2022 Circulus venustus (Hedley, 1901) Circulus victormonzoi Rubio & Rolán, 2022 Circulus villacampae Rubio & Rolán, 2022 Circulus virginiae (Jousseaume, 1872) Circulus virginieherosae Rubio & Rolán, 2022 Circulus xuae L.-W. Lin & Rolán, 2024
The Indo-Pacific Molluscan Database also mentions the following species with names in current use : Circulus callusa (Laseron, 1958) Circulus pachyston (Verco, 1907)
Species brought into synonymy Circulus bailyi Hertlein & A. M. Strong, 1951: synonym of Cyclostremiscus bailyi (Hertlein & A. M. Strong, 1951) Circulus biporcata [sic]: synonym of Circulus biporcatus (A. Adams, 1863) Circulus carinulatus Locard, 1889: synonym of Circulus striatus (Philippi, 1836) Circulus cerrosensis Bartsch, 1907 accepted as Cyclostremiscus cerrosensis (Bartsch, 1907) Circulus cingulatus Bartrum, 1919 † accepted as Pterolabrella cingulata (Bartrum, 1919) † Circulus costulatus Locard, 1889: synonym of Circulus striatus (Philippi, 1836) Circulus cubanus Pilsbry & Aguayo, 1933: synonym of Cyclostremiscus cubanus (Pilsbry & Aguayo, 1933) Circulus dalli Bush, 1897: synonym of Cyclostremiscus dalli (Bush, 1897) Circulus delectabile (Tate, 1899) accepted as Circulus delectabilis (Tate, 1899) (unaccepted > incorrect grammatical agreement of specific epithet) Circulus diomedeae Bartsch, 1911 accepted as Cyclostremiscus diomedeae (Bartsch, 1911) Circulus formosissimus Brugnone, 1873: synonym of Skeneoides jeffreysii (Monterosato, 1872) Circulus hendersoni (Dall, 1927): synonym of Cyclostremiscus hendersoni (Dall, 1927) Circulus jeffreysii Monterosato, 1872: synonym of Skeneoides jeffreysii (Monterosato, 1872) Circulus madreensis F. Baker, Hanna & A. M. Strong, 1938 accepted as Cyclostremiscus madreensis (F. Baker, Hanna & A. M. Strong, 1938) Circulus margaritiformis (Dall, 1927): synonym of Cirsonella margaritiformis (Dall, 1927) Circulus modesta [sic]: synonym of Circulus modestus (Gould, 1859) Circulus nicholsoni A. M. Strong & Hertlein, 1939 accepted as Episcynia nicholsoni (A. M. Strong & Hertlein, 1939) Circulus perlatus Pelseneer, 1903 accepted as Orbitestella perlata (Pelseneer, 1903) (original combination)