# Circulus (gastropod)

Circulus is a genus of very small and minute sea snails with an operculum, marine gastropod mollusks in the family Vitrinellidae.

## Species

According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Circulus
* 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)
* Circulus philippinensis Rubio & Rolán, 2022: synonym of Circulus pacomartinezi Rubio & Rolán, 2023 (junior homonym, invalid: secondary junior homonym of Circulus philippinensis (Shuto, 1969); C. pacomartinezi is a replacement name)
* Circulus sarsi (Bush, 1897) accepted as Orbitestella sarsi (Bush, 1897)
* Circulus stirophorus M. Smith, 1937: synonym of Cyclostremiscus beauii (P. Fischer, 1857)
* * Circulus taigai Hertlein & A. M. Strong, 1951 accepted as Cyclostremiscus taigai (Hertlein & A. M. Strong, 1951)
* Circulus tornata [sic]: synonym of Circulus tornatus (A. Adams, 1864)
* Circulus tornatus (A. Adams, 1864): synonym of Tuberes tornatus (A. Adams, 1864) (unaccepted > superseded combination)
* Circulus translucens (Dall, 1927): synonym of Xyloskenea translucens (Dall, 1927)
* Circulus tricarinatus (Wood S., 1848): synonym of accepted as Circulus striatus (Philippi, 1836)