Bivalvia - Cardiida - Mactridae
Alternative spellings: Mactra (Micromactra), Mactrotoma (Micromactra), Micromactra
Parent taxon: Standella according to J. H. Signorelli 2019
See also Coan et al. 2000, Coan and Valentich-Scott 2012 and Pilsbry and Olsson 1941
Sister taxa: Standella (Eastonia), Standella (Mactroderma), Standella (Standella), Standella mystrosura, Standella striatella, Mactrotoma quirosana, Mactrotoma californica
Subtaxa: Standella (Micromactra) angusta Standella (Micromactra) janeiroensis Standella (Micromactra) surinamensis
Type: Mactra californica
Ecology: facultatively mobile infaunal suspension feeder
Distribution:
• Quaternary of Costa Rica (1 collection), Ecuador (1), South Africa (5), United States (1: Florida)
• Pliocene of Ecuador (1), Trinidad and Tobago (2)
• Miocene of Colombia (1), Trinidad and Tobago (1), Venezuela (2)
Total: 15 collections each including a single occurrence