Belongs within: Olivoidea.
Olivella, the dwarf olives, is a genus of predatory marine gastropods similar to the olives of the family Olividae, but with a more produced spire and a large, thin, horny operculum (Oldroyd 1927). Members of the type subgenus have a parietal callus extending past the aperture, and lirae along the parietal and columellar walls of the pillar (Burch & Burch 1963).
Characters (Oldroyd 1927): Shell polished, small; spire produced, acute, suture canaliculated; aperture narrow behind, enlarged anteriorly; columella plicated in front, callous posteriorly. Operculum horny, thin, half ovate, with apical nucleus.
<==Olivella Swainson 1831BR05
|--O. (Olivella)BC01
| |--*O. (O.) purpurata Swainson 1831BR17
| |--O. (O.) adelae Olsson 1956BC01
| |--O. (O.) alba (Marrat in Sowerby 1871)BB63
| |--O. (O.) altatae Burch & Campbell 1963BC01
| |--O. (O.) bitleri Olsson 1956BB63
| |--O. (O.) brogii Olsson 1956BB63
| |--O. (O.) cocosensis Olsson 1956BB63
| |--O. (O.) dama (Wood 1828)BB63
| |--O. (O.) drangai Olsson 1956BB63
| |--O. (O.) fletcherae Berry 1958BB63
| |--O. (O.) gracilis (Broderip & Sowerby 1829)BB63 (see below for synonymy)
| | |--O. g. gracilisBB63
| | |--O. g. gaylordi Ford 1894BB63
| | `--O. g. ternuculata Weisbord 1962W62
| |--O. (O.) petiolita (Duclos in Chenu 1835) (see below for synonymy)W62
| |--O. (O.) rehderi Olsson 1956BB63
| |--O. (O.) riverae Olsson 1956BB63
| |--O. (O.) sphoni Burch & Campbell 1963BC01
| |--O. (O.) spissilabiata Weisbord 1962W62
| |--O. (O.) steveni Burch & Campbell 1963BB63
| | |--O. s. steveniBB63
| | `--O. s. campbelli Burch & Campbell 1963BB63
| |--O. (O.) tergina (Duclos 1835)BB63 [=Olivina terginaC64]
| |--O. (O.) undatellaO27
| |--O. (O.) venezuelensis Weisbord 1962W62
| `--O. (O.) walkeri Berry 1958BB63
|--O. (Callianax Adams & Adams 1853)BB63
| |--O. (C.) intorta (Carpenter 1856)BB63
| |--O. (C.) pedroana (Conrad 1856) [incl. O. pycna Berry 1935]BB63
| `--O. (C.) zonalis (Lamarck 1811)BB63 [=Olivina zonalisC64]
|--O. (Dactylidella Wood 1928)BB63
| |--O. (D.) anazora (Duclos 1835)BB63 [=Olivina anazoraC64]
| `--O. (D.) cymatilis Berry 1963BC01
|--O. (Lamprodoma Swainson 1840)BB63
| `--O. (L.) volutella (Lamarck 1811)BB63
|--O. (Macgintiella Olsson 1956)BB63
| `--O. (*M.) watermaniBB63
|--O. (Minioliva Olsson 1956)BB63
| |--O. (M.) fundarugata Weisbord 1962W62
| |--O. (M.) inconspicua (Adams 1852)BB63
| |--O. (M.) maiquetiana Weisbord 1962W62
| |--O. (M.) salinae Weisbord 1962W62
| `--O. (M.) subfilifera Weisbord 1962W62
|--O. (Niteoliva Olsson 1956)BB63
| |--O. (N.) minuta (Link 1807) (see below for synonymy)W62
| | |--O. m. minutaW62
| | `--O. m. marmosa Olsson & McGinty 1958W62
| |--O. (N.) morrisoni Olsson 1956BB63
| |--O. (N.) peterseni Olsson 1956BB63
| `--O. (N.) verreauxii (Ducros 1857) [=Oliva verreauxii, Olivella verreauxi]W62
|--O. (Pachyoliva Olsson 1956)BB63
| |--O. columellaris (Sowerby 1825)BB63 [=Olivina columellarisC64]
| `--O. (P.) semistriata (Gray 1839)CC95
`--O. (Zanoetella Olsson 1956)BB63
`--O. (Z.) zanoeta (Duclos 1835)BB63
Olivella incertae sedis:
O. acra Woodring 1928W62
O. aureocincta [=Oliva aureocincta, incl. Oliva pellucida]C64
O. australis Tennison Woods 1877P79
O. baetica (Marrat in Sowerby 1871) [incl. O. porteri Dall 1910]BB63
|--O. b. baeticaO27
|--O. b. diegensis Oldroyd 1921O27
`--O. b. mexicana Oldroyd 1921O27
O. bayeri Abbott 1951W62
O. biplicata (Sowerby 1825)O27 (see below for synonymy)
O. borealisK96
O. canaliculataW62
O. fargoi Olsson & Harbison 1953W62
O. fulgidaC64
O. lataC60
O. miriadina (Duclos 1835)BB63
O. muticaW62 [=Oliva muticaW62; incl. Oliva fimbriataC64, Oliva rufifasciataC64]
O. muticoidesW62
O. niveaW62
O. perplexa Olsson 1956W62
O. stegeri Olsson 1956BC01
O. wilsoni Olsson 1956W62
Olivella biplicata (Sowerby 1825)O27 [incl. O. biplicata angelina Oldroyd 1921BB63, O27, O. biplicata fucana Oldroyd 1921BB63, O27, O. glandinariaC64, O. biplicata lapillus Vanatta 1915BB63, O27, O. biplicata parva Oldroyd 1920BB63, O27]
Olivella (Niteoliva) minuta (Link 1807) [=Porphyria minuta, Oliva minuta; incl. Voluta nitidula Dillwyn 1917, Olivella nitidula, Oliva zigzag Duclos 1835]W62
Olivella (Olivella) gracilis (Broderip & Sowerby 1829)BB63 [=Olivina gracilisC64; incl. Olivella versicolor (Marrat in Sowerby 1871BB63]
Olivella (Olivella) petiolita (Duclos in Chenu 1835) [=Oliva petiolita; incl. Oliva esther Duclos 1835, Olivella petiolita var. esther]W62
*Type species of generic name indicated
References
[BR05] Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1–2): 1–397.
[BR17] Bouchet, P., J.-P. Rocroi, B. Hausdorf, A. Kaim, Y. Kano, A. Nützel, P. Parkhaev, M. Schrödl & E. E. Strong. 2017. Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia 61 (1–2): 1–526.
[BC01] Boyko, C. B., & J. R. Cordeiro. 2001. Catalog of Recent type specimens in the Division of Invertebrate Zoology, American Museum of Natural History. V. Mollusca, part 2 (class Gastropoda [exclusive of Opisthobranchia and Pulmonata], with supplements to Gastropoda [Opisthobranchia], and Bivalvia). Bulletin of the American Museum of Natural History 262: 1–170.
[BB63] Burch, J. Q., & R. L. Burch. 1963. Genus Olivella in eastern Pacific. Nautilus 77 (1): 1–8.
[C64] Carpenter, P. P. 1864. Supplementary report on the present state of our knowledge with regard to the Mollusca of the west coast of North America. Report of the British Association for the Advancement of Science 33: 517–686.
[CC95] Coovert, G. A., & H. K. Coovert. 1995. Revision of the supraspecific classification of marginelliform gastropods. Nautilus 109 (2–3): 43–110.
[C60] Cox, L. R. 1960. Gastropoda: general characteristics of Gastropoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt I. Mollusca 1: Mollusca—General Features, Scaphopoda, Amphineura, Monoplacophora, Gastropoda—General Features, Archaeogastropoda and some (mainly Paleozoic) Caenogastropoda and Opisthobranchia pp. I84–I169. Geological Society of America, and University of Kansas Press.
[K96] Kantor, Y. I. 1996. Phylogeny and relationships of Neogastropoda. In: Taylor, J. D. (ed.) Origin and Evolutionary Radiation of the Mollusca pp. 221–230. Oxford University Press: Oxford.
[O27] Oldroyd, I. S. 1927. The Marine Shells of the West Coast of North America vol. 2 pt 1. Stanford University Press: Stanford University (California).
[P79] Petterd, W. F. 1879. List of the freshwater shells of Tasmania. Journal of Conchology 2: 80–88.
[W62] Weisbord, N. E. 1962. Late Cenozoic gastropods from northern Venezuela. Bulletins of American Paleontology 62: 7–672.