†Agaronia testacea mancinella Olsson 1922 (snail)
Gastropoda - Neogastropoda - Olivellidae
Alternative combination: Oliva mancinella
Full reference: A. A. Olsson. 1922. The Miocene of Northern Costa Rica. Bulletins of American Paleontology 9(39):1-309
Belongs to Agaronia testacea according to W. P. Woodring 1964
Sister taxa: Agaronia testacea costaricensis, Agaronia testacea hadra, Oliva testacea costaricensis
Type specimen: PRI 20990, a shell
Ecology: epifaunal carnivore
Distribution: found only at East Grape Point Creek (Pliocene of Costa Rica)