Olivella (gastropod)
Olivella, common name the dwarf olives, is a genus of small predatory sea snails, marine gastropod molluscs in the subfamily Olivellinae of the family Olividae, the olives. Olivella is the type genus of the family.
Description
Adults in the Olivella species are usually quite small, hence the genus has the common name "dwarf olive". Species of Oliva are usually larger, but there are exceptions.The shell of Olivella usually has a keel-like twist at the anterior end of the columella. The wall above it may be concave or have deep furrows. The inner lip can sometimes show a deep callus, and in many cases this extends over the parietal wall to the end of the aperture. This callus formation may extend to the spire but leave the suture open. Most species of Olivella have a thin, chitinous operculum, but this operculum is lacking in Olivella nivea, as is also the case in species of Oliva.
The spire is acuminate, elevated with the suture canaliculated. The inner lip is simple posteriorly, regularly and closely plicate at the fore part of the columella. The callus is moderate and restricted.
The spire is obtuse, covered with a thick deposit of enamel. The aperture is narrow and plicate. The inner lip has a large, thickened callus, produced at the hind part, and covering and concealing the spire.
Species
Species in the genus Olivella include:Olivella acteocina Olsson, 1956Olivella alba Olivella albina Paulmier, 2015Olivella altatae Burch & Campbell, 1963Olivella amblia Watson, 1882Olivella anazora Olivella ankeli Diaz & Gotting, 1990Olivella arionata Absalão, 2000Olivella aureobalteata Kuroda & Habe, 1971Olivella aureocincta Carpenter, 1857Olivella barbenthos Recourt, 1989Olivella biminiensis Petuch, 2002Olivella bitleri Olsson, 1956Olivella borealis Golikov, 1967Olivella broggi Olsson, 1956Olivella bullula - bubble dwarf oliveOlivella careorugula Absalão & Pimenta, 2003Olivella clanzigi Lozouet 1992 Olivella cocosensis Olsson, 1956Olivella coensis Mansfield, 1930Olivella columellaris Olivella compta Olivella costulata Paulmier, 2007Olivella cymatilis S. S. Berry, 1963Olivella dama Olivella decorata Paulmier, 2015Olivella defiorei Klappenbach, 1964Olivella diodocus Olivella dolichomorpha Paulmier, 2007Olivella drangai Olsson, 1956Olivella ephamilla Watson, 1882Olivella esther Olivella exilis Olivella fimbriata Olivella fletcherae S. S. Berry, 1958Olivella floralia - rice oliveOlivella formicacorsii Klappenbach, 1962Olivella fortunei Olivella fulgurata A. Adams & Reeve, 1850Olivella fundarugata Weisbord, 1962Olivella fuscocincta Dall, 1889Olivella gaylordi Ford, 1894Olivella gracilis Olivella guayaquilensis Bartsch, 1928Olivella guildingii Olivella hyalina Raven & Recourt, 2018Olivella hyphala Absalão & Pimenta, 2003Olivella inconspicua Olivella intermedia Paulmier, 2015Olivella intorta Carpenter, 1857 Olivella inusta G. B. Sowerby III, 1915Olivella japonica Pilsbry, 1910Olivella kifos Macsotai & Campos, 2001Olivella klappenbachi Absalão & Pimenta, 2003Olivella lactea Olivella lanceolata Olivella lepta Olivella lindae Petuch, 1992: nomen nudumOlivella lineolata Olivella macgintyi Olsson, 1956Olivella mandarina Olivella marginelloides Paulmier, 2007Olivella marmosa Olsson & McGinty, 1958Olivella mayabe Espinosa & Ortega, 1998Olivella mica : nomen dubiumOlivella microstriata Raven & Recourt, 2018 Olivella micula Olivella miliacea Olivella miliola Olivella millepunctata Olivella minuscula Paulmier, 2015Olivella minuta - minute dwarf oliveOlivella miriadina Olivella moorei Abbott, 1951Olivella morrisoni Olsson, 1956Olivella mutica - variable dwarf oliveOlivella myrmecoon Dall, 1912Olivella nana Olivella nivea - snowy dwarf oliveOlivella nota Olivella olssoni Altena, 1971Olivella orejasmirandai Klappenbach, 1986Olivella oteroi Bermejo, 1979Olivella parva T. S. Oldroyd, 1921 Olivella pedroana Olivella perplexa Olsson, 1956Olivella peterseni Olsson, 1956Olivella plana Olivella poppei Bozzetti, 1998Olivella prefloralia Olsson & Harbison, 1953Olivella puelcha Olivella pulchella Olivella pulchra Olivella pulicaria Olivella pura Olivella pusilla - tiny dwarf oliveOlivella rehderi Olsson, 1956Olivella riosi Klappenbach, 1991Olivella riverae Olsson, 1956Olivella rosolina Olivella rotunda Dall, 1889Olivella rubra Olivella rufifasciatus Olivella santacruzence Castellanos, 1965 & Fernández, 1965Olivella scurra Olivella semistriata Olivella signata Olivella sphoni Burch & Campbell, 1963Olivella spreta Gould, 1861Olivella spretoides Yokoyama, 1922Olivella stegeri Olsson, 1956Olivella steveni Burch & Campbell, 1963Olivella tabulata Dall, 1889 Olivella tehuelcha Olivella tergina Olivella thompsoni Olsson, 1956Olivella tunquina Olivella versicolor Olivella vitilia Watson, 1882Olivella volutella Olivella volutelloides Olivella walkeri S. S. Berry, 1958Olivella watermani McGinty, 1940Olivella zanoeta Olivella zenopira Olivella zonalis;Species brought into synonymy :Olivella adelae Olsson, 1956: synonym of Olivella lactea Olivella alectona - San Pedro dwarf olive: synonym of Callianax alectona Olivella amoni Sterba & Lorenz, 2005: synonym of Janoliva amoni Olivella apicalis Kay, 1979: synonym of Ancillina apicalis Olivella australis Tenison-Woods, 1878: synonym of Parviterebra brazieri Olivella baetica Carpenter, 1864 - beatic dwarf olive: synonym of Callianax alectona Olivella biplicata - purple dwarf olive: synonym of Callianax biplicata Olivella columba : synonym of Olivella esther Olivella dealbata - whitened dwarf olive: synonym of Olivella mica Olivella microspira Paulmier, 2007: synonym of Olivella miliola Olivella millepunctata Duclos, 1840: synonym of Olivancillaria millepunctata Olivella monilifera : synonym of Olivella mica Olivella paxillus Reeve, 1850: synonym of Oliva nitidula Duclos, 1835Olivella petiolita : synonym of Olivella minuta Olivella plata : synonym of Olivella puelcha Olivella purpurata Swainson, 1831: synonym of Olivella dama Olivella simplex Pease, 1868: synonym of Olivellopsis simplex Olivella striga : synonym of Callianax strigata Olivella verriauxii : synonym of ''Olivella minuta''