Family Nuculanidae Adams and Adams 1858 (pointed nut clam)
Synonym: Ledidae Adams and Adams 1858
Parent taxon: Nuculanoidea according to E. V. Coan and P. Valentich-Scott 2012
Sister taxa: Isoarcidae, Malletiidae, Phaseolidae, Polidevciidae, Sareptidae, Saturnidae, Yoldiidae, Zealedidae
Subtaxa: Acilana, Acutispinula, Australoportlandia, Bathyspinula, Bathyspinulinae, Calorhadia, Costelloleda, Dacromya, Ezonuculana, Glyptoleda, Hilgardia, Indonuculana, Ledella, Ledellinae, Ledoides, Lembulus, Litorhadia, Mesosaccella, Multidentata, Nuculaninae, Nucundata, Orthoyoldia, Parayoldiella, Phestia, Phestiinae, Polidevcia, Poroleda, Poroledidae, Praeportlandia, Propeleda, Saccella, Scissuladrana, Spineilo, Xiaoschuiculana, Zealeda
Ecology: facultatively mobile infaunal deposit feeder-suspension feeder