Ancillariidae


The Ancillariidae is a taxonomic family of sea snails, marine gastropod molluscs in the superfamily Olivoidea. They are gastropods, which belong to the larger group of mollusks. This family is part of the superfamily Cypraeoidea, which includes cowries, a well-known group of sea snails.

Distribution and habitat

Ancillariidae species can be found in tropical and subtropical waters around the world, particularly in the Indo-Pacific region. They inhabit diverse marine environments, including coral reefs, sandy bottoms, and seagrass beds.

Physical characteristics

Ancillariidae shells are elongated, cylindrical, and slightly curved. They have a smooth and glossy surface, with some species displaying prominent ridges or knobs. The shells exhibit a wide range of colors and patterns, from plain white or cream to vibrant and intricate designs.

Behavior and feeding habits

Ancillariidae snails are primarily nocturnal, being active at night to feed on algae, detritus, and small invertebrates. They use their specialized radula to scrape food particles from the substrate or graze on algae. During the day, they seek shelter in crevices or burrow in the sand to avoid predators and excessive sunlight.

Reproduction

Reproduction in Ancillariidae involves separate sexes, with individuals being either male or female. They release eggs and sperm into the water, where fertilization takes place externally. The larvae develop into planktonic forms, drifting in ocean currents until they settle on the substrate and undergo metamorphosis into adults.

Genera

Genera within the family Ancillariidae include:Alocospira Cossmann, 1899Amalda H. Adams & A. Adams, 1853
  • † Anbullina K. van W. Palmer, 1937 Ancilla Lamarck, 1799
  • † Ancillarina Bellardi, 1882 Ancillina Bellardi, 1882Ancillista Iredale, 1936
  • † Ancillopsis Conrad, 1865 Anolacia Gray, 1857
  • † Bearizia Pacaud, Merle & Pons, 2013 Eburna Lamarck, 1801Entomoliva Bouchet & Kilburn, 1991
  • † Eoancilla Stephenson, 1941 Micrancilla Maxwell, 1992
  • † Monoptygma I. Lea, 1833
  • † Olivula Conrad, 1832
  • † Palmoliva Allmon & Friend, 2023
  • † Spirancilla H. E. Vokes, 1935 Turrancilla Martens, 1903
;Genera brought into synonymyAnaulax Roissy, 1805: synonym of Ancilla Lamarck, 1799 Ancillaria Lamarck, 1811: synonym of Ancilla Lamarck, 1799 Ancillus Montfort, 1810: synonym of AncillaLamarck, 1799 Anolacea: synonym of Anolacia Gray, 1857 Austrancilla Habe, 1959: synonym of Amalda H. Adams & A. Adams, 1853Baryspira P. Fischer, 1883: synonym of Amalda P. Fischer, 1883 represented as Amalda H. Adams & A. Adams, 1853Chilotygma H. Adams & A. Adams, 1853: synonym of Ancilla H. Adams & A. Adams, 1853 represented as Ancilla Lamarck, 1799Dipsaccus H. Adams & A. Adams, 1853: synonym of Eburna Lamarck, 1801Exiquaspira Ninomiya, 1988: synonym of Amalda H. Adams & A. Adams, 1853Gracilancilla Thiele, 1925: synonym of Ancillina Bellardi, 1882Gracilispira Olsson, 1956: synonym of Amalda Olsson, 1956 represented as Amalda H. Adams & A. Adams, 1853Sandella Gray, 1857: synonym of Amalda H. Adams & A. Adams, 1853Sparella Gray, 1857: synonym of Ancilla Gray, 1857 represented as Ancilla Lamarck, 1799