Circulus Jeffreys 1865

Circulus is a genus of very small and minute sea snails with an operculum, marine gastropod mollusks in the family Vitrinellidae. ^[2]

Species

According to the World Register of Marine Species (WoRMS), the following species with valid names are included within the genus Circulus ^[3]

The Indo-Pacific Molluscan Database also mentions the following species with names in current use :^[1]

• 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)

References

• Kuroda T. & Habe T. 1952. Check list and bibliography of the Recent marine Mollusca of Japan. Leo W. Stach, Tokyo. 210 pp
• Habe, T. (1961). Descriptions of fifteen new species of Japanese shells. Venus. 21(4): 416-431.
• Oliver, J. & Rolan, E., 2011. The family Tornidae (Gsatropoda: Rissooidea) in the East Atlantic, 2. Circulinae. Iberus 29(1): 9-33
• Rubio, F. & Rolán, E. (2022). New species of Vitrinellidae (Gastropoda: Truncatelloidea) from the Indo-Pacific. The genus Circulus Jeffreys, 1865. Museo de Historia Natural, Universidad Santiago de Compostela. 422 pp.
• Rubio F & Rolán E. , 2023. Circulus pacomartinezi nomen novum for Circulus philippinensis Rubio & Rolán, 2022, pag. 359. Iberus 41(1): 151-152