Back-formation from Buchiidae, from the genus name Buchia.
buchiid (plural buchiids)
- (malacology, paleontology) A bivalve mollusc of the extinct family †Buchiidae.
1997, Rolf Ludvigsen, Life in Stone: A Natural History of British Columbia's Fossils, →ISBN, page 177:
- The buchiids were certainly the most abundant bivalve group in the oceans of British Columbia during the Late Jurassic and Early Cretaceous.