Bivalvia - Protobranchia - Nuculanidae

Alternative spelling: Yoldia (Orthoyoldia)

Parent taxon: Nuculanidae according to H. E. Vokes 1980

Sister taxa: Acilana, Acutispinula, Australoportlandia, Bathyspinula, Bathyspinulinae, Calorhadia, Costelloleda, Dacromya, Ezonuculana, Glyptoleda, Hilgardia, Indonuculana, Ledella, Ledellinae, Ledoides, Lembulus, Litorhadia, Mesosaccella, Multidentata, Nuculaninae, Nucundata, Parayoldiella, Phestia, Phestiinae, Polidevcia, Poroleda, Poroledidae, Praeportlandia, Propeleda, Saccella, Scissuladrana, Spineilo, Xiaoschuiculana, Zealeda

Subtaxa: Orthoyoldia claibornensis, Orthoyoldia psammotaea, Yoldia (Orthoyoldia) haboroensis

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Ecology: facultatively mobile infaunal deposit feeder-suspension feeder