Ancilla, common name the ancillas, is a genus of sea snails, marine gastropod mollusks in the family Ancillariidae.

Description (Described as Chilotygma) The spire is moderate, the suture enamelled. The inner lip has the callus produced posteriorly into a strong angular tooth.Adams, H. & Adams, A. (1853-1858). The genera of Recent Mollusca; arranged according to their organization. London, van Voorst. Vol. 1: xl + 484 pp.; vol. 2: 661 pp.; vol. 3: 138 pls

(Described as Anaulax) The shell is not polished. The spire is produced with sutures covered with a thick deposit of enamel. The inner lip has the callus extended, thick, and covering the spire.

(Described as Ancillaria) The shell is thin, ventricose and striated. The spire is short, obtuse with the suture enamelled. The aperture is wide.

(Described as Ancilla) The shell is oblong, subcylindrical and polished. The spire is short with the suture filled up with enamel. The aperture is large, dilated and effuse anteriorly. The twisted columella is callous anteriorly. The outer lip is thin, simple and acute.

Species Species within the genus Ancilla include:

Ancilla acuminata (G.B. Sowerby II, 1859) Ancilla adelphe Kilburn, 1981 Ancilla albisulcata (G.B. Sowerby I, 1830) Ancilla albozonata E.A. Smith, 1904 Ancilla ampla (Gmelin, 1791) † Ancilla asphaltodes Beets, 1942 Ancilla atimovatae Kantor, Fedosov, Puillandre & Bouchet, 2016 † Ancilla austriaca (R. Hoernes, 1875) † Ancilla bandongensis (K. Martin, 1879) Ancilla boschi Kilburn, 1980 Ancilla castanea (G.B. Sowerby I, 1830) Ancilla chrysoma Kilburn, 1981 Ancilla cinnamomea Lamarck, 1801 Ancilla culierei Cossignani & Quiquandon, 2019 † Ancilla decipiens K. Martin, 1931 Ancilla djiboutina (Jousseaume, 1894) Ancilla eburnea (Deshayes, 1830) † Ancilla elegantula (Tesch, 1915) Ancilla eloiseae T. Cossignani, 2023 † Ancilla estebbunensis Vera-Peláez, 2022 † Ancilla everwijni (K. Martin, 1884) Ancilla exigua (G.B. Sowerby I, 1830) Ancilla farsiana Kilburn, 1981 Ancilla faustoi H.R. Matthews, H.C. Matthews & Muniz Dijck, 1979 Ancilla giaquintoi Bozetti, 2006 Ancilla guttata Boyer, 2015 † Ancilla iberica (Landau & C. M. Silva, 2006) † Ancilla ickei K. Martin, 1914 Ancilla inornata (E.A. Smith, 1879) Ancilla iota Kilburn, 1981 † Ancilla javana (K. Martin, 1879) † Ancilla junghuhni (K. Martin, 1879) Ancilla kaviengensis Kantor, Fedosov, Puillandre & Bouchet, 2016 † Ancilla latifasciata K. Martin, 1933 Ancilla lhaumeti Kantor, Fedosov, Puillandre & Bouchet, 2016 Ancilla lineolata (A. Adams, 1853) Ancilla marmorata (Reeve, 1864) † Ancilla martini (Tesch, 1915) Ancilla matthewsi Burch & Burch, 1967 Ancilla minima Thiele, 1925 Ancilla morandii Cossignani, 2019 Ancilla morrisoni Kantor, Fedosov, Puillandre & Bouchet, 2016 Ancilla murrayi Kilburn, 1981 † Ancilla nitida (Wanner & Hahn, 1935) † Ancilla nonna K. Martin, 1914 † Ancilla nuda (K. Martin, 1884) † Ancilla olsoni P. A. Maxwell, 1992 Ancilla ordinaria E.A. Smith, 1906 Ancilla ovalis (G.B. Sowerby II, 1859) † Ancilla paeteli K. Martin, 1914 † Ancilla parvula (K. Martin, 1884) † Ancilla propinqua (Zittel, 1863) Ancilla pruinosa Boyer, 2015 † Ancilla pusilla K. Martin, 1931 † Ancilla rasa K. Martin, 1914 † Ancilla rembangensis (K. Martin, 1906) Ancilla rouillardi Kilburn, 1981 Ancilla sarda (Reeve, 1864) Ancilla scaphella (G.B. Sowerby II, 1859) Ancilla siberutensis Thiele, 1925 † Ancilla songoensis K. Martin, 1914 Ancilla sticta Kilburn, 1981 Ancilla stranoi T. Cossignani, 2024 † Ancilla stupaeformis Beets, 1942 Ancilla sultana F. Boyer, 2015 Ancilla taylori Kilburn, 1981 † Ancilla teschi (Koperberg, 1931) Ancilla testudae (Kilburn, 1977) Ancilla thomassini Kilburn, 1981 Ancilla tronsoni (G.B. Sowerby II, 1859) Ancilla undulata Boyer, 2015 † Ancilla vegai Vera-Peláez, 2022 Ancilla ventricosa (Lamarck, 1811)

Synonyms Ancilla agulhasensis Thiele, 1925: synonym of Ancilla ordinaria E.A. Smith, 1906 Ancilla alba Perry, 1811: synonym of Buccinanops vittatum (Linnaeus, 1767) Ancilla albocallosa (Lischke, 1873): synonym of Amalda albocallosa (Lischke, 1873) Ancilla alcocki E. A. Smith, 1906: synonym of Turrancilla alcocki (E. A. Smith, 1906) Ancilla aperta (G. B. Sowerby I, 1825): synonym of Anolacia aperta (G. B. Sowerby I, 1825) Ancilla aureocallosa (Kilburn & Jenner, 1977): synonym of Ancillista aureocallosa Kilburn & Jenner, 1977 † Ancilla buccinoides Lamarck, 1803: synonym of † Spirancilla buccinoides (Lamarck, 1803) (superseded combination) † Ancilla canalifera Lamarck, 1803: synonym of † Ancillarina canalifera (Lamarck, 1803) (superseded combination) Ancilla cingulata (G. B. Sowerby I, 1830): synonym of Ancillista cingulata (G. B. Sowerby I, 1830) Ancilla coccinea Fischer, 1807: synonym of Ancilla cinnamomea Lamarck, 1801 Ancilla coccinea Hedley, 1914: synonym of Amalda coccinata Kilburn, 1980 Ancilla edgariana Schepman, 1911: synonym of Amalda edgariana (Schepman, 1911) Ancilla fasciata Reeve, 1864: synonym of Ancilla ordinaria E.A. Smith, 1906 Ancilla lineata Perry, 1811: synonym of Nassarius glans glans (Linnaeus, 1758) Ancilla maculata Perry, 1811: synonym of Babylonia areolata (Link, 1807) Ancilla mauritiana G.B. Sowerby I, 1830: synonym of Anolacia mauritiana (G.B. Sowerby I, 1830) Ancilla muscae Pilsbry, 1926: synonym of Ancillista muscae (Pilsbry, 1926) Ancilla optima G.B. Sowerby III, 1897: synonym of Amalda optima (G.B. Sowerby III, 1897) Ancilla ordinaria major Turton, 1932: synonym of Ancilla albozonata E.A. Smith, 1904 Ancilla oryza Reeve, 1864: synonym of Ancilla lineolata (A. Adams, 1853) Ancilla osculata Sowerby, 1900: synonym of Bullia osculata (Sowerby, 1900) Ancilla pallida Perry, 1811: synonym of Babylonia spirata (Linnaeus, 1758) Ancilla pura Sowerby, 1892: synonym of Ancilla marmorata (Reeve, 1864) Ancilla reboriae Poppe, Tagaro & Goto, 2018: synonym of Turrancilla reboriae (Poppe, Tagaro & Goto, 2018) Ancilla rubiginosa : synonym of Amalda rubiginosa (Swainson, 1823) (original combination) † Ancilla staminea (Conrad, 1832) : synonym of † Olivula staminea (Conrad, 1832) Ancilla suavis Yokoyama, 1926 : synonym of † Turrancilla suavis (Yokoyama, 1926) (superseded combination) Ancilla sumatrana Thiele, 1925: synonym of Ancillina sumatrana (Thiele, 1925)

References

Kilburn R.N. (1981). Revision of the genus Ancilla Lamarck, 1799 (Mollusca: Olividae: Ancillinae). Annals of the Natal Museum. 24(2): 349-463.

External links Lamarck, J.B.M. (1799). Prodrome d'une nouvelle classification des coquilles, comprenant une rédaction appropriée des caractères géneriques, et l'établissement d'un grand nombre de genres nouveaux. Mémoires de la Société d'Histoire Naturelle de Paris. 1: 63-91 Montfort P. [Denys de]. (1808-1810). Conchyliologie systématique et classification méthodique des coquilles. Paris: Schoell. Vol. 1: pp. lxxxvii + 409

Gray, J. E. (1857). Guide to the systematic distribution of Mollusca in the British Museum. Part I. [Gastropoda]. British Museum, London, xii + 230 pp Lamarck (J.B.M.de) (1811). Suite de la détermination des espèces de Mollusques testacés. Annales du Muséum National d'Histoire Naturelle. 16: 300-328.