Pachyoliva
"Shell small or of medium size, solid, with a low or elevated, pointed spire and a relatively large body-whorl. Color pattern predominantly banded. Pillar structure is formed by a single, keel-like plait at the end of the columella, above which the pillar wall is deeply excavated. Parietal wall smooth, typically covered by a thick layer of callus which may enlarge into a knob-like mass at the end of the aperture and continue across the penultimate whorl to the suture. Sutures distinct, deeply grooved or channelled. Operculum chitinous. Radular ribbon small, with about 34 rows of teeth. Rachidian tooth, curved, crown-shaped, the basal margin nearly straight, the top convexly elevated in the middle, the sides narrowed, the cusps variable in number, often numerous (± 34), larger in the middle zone, smaller towards the ends, often with one to several subsidiary or needle-like denticles between them. Laterals blade- or spatula-like, with rounded or minutely denticulate ends.".
Type species by original designation: Oliva columellaris Sowerby, 1825.
Troost et al. (2012) commented on the two extant species of Pachyoliva.
Apart from the two extant species, Olsson (1956) also included Olivella locklini Olsson, 1956, from the Pliocene Okeechobee Group, Florida, in this genus-group taxon.