Bivalvia - Protobranchia - Malletiidae
Synonym: Synek Barrande 1881
Full reference: J. Hall and R. P. Whitfield. 1869. Preliminary notice of the lamellibranchiate shells of the upper Helderberg, Hamilton and Chemung groups, with others from the Waverly sandstones, part 2. 1-80
Parent taxon: Malletiidae according to H. E. Vokes 1980
Sister taxa: Anthraconeilo, Arisaigia, Australoneilo, Cadomia, Carinineilo, Concavoleda, Ctenodontella, Dysodonta, Ekstadia, Johnmartinia, Katadesmia, Koenenia, Lapteviella, Lophoconcha, Malletia, Metapalaeoneilo, Myoplusia, Neilo, Nuculites, Perissonata, Phaenodesmia, Prosoleptus, Quadratonucula, Sluha, Spathelopsis, Taimyrodon, Tindariopsis, Vnigriella, Yoldioides, Zeehania
Subtaxa: Palaeoneilo acarinata, Palaeoneilo arctica, Palaeoneilo artiensis, Palaeoneilo centralis, Palaeoneilo cuneiformis, Palaeoneilo elliptica, Palaeoneilo excentrica, Palaeoneilo fecunda, Palaeoneilo fibularis, Palaeoneilo fortistriata, Palaeoneilo galatea, Palaeoneilo guizhouensis, Palaeoneilo leiyangensis, Palaeoneilo lutosa, Palaeoneilo magna, Palaeoneilo mcchesneyana, Palaeoneilo occidentalis, Palaeoneilo ogachiensis, Palaeoneilo oviformis, Palaeoneilo parenica, Palaeoneilo postolegi, Palaeoneilo praeacuta, Palaeoneilo qujianensis, Palaeoneilo qujiangensis, Palaeoneilo sera, Palaeoneilo shaoyangensis, Palaeoneilo sinuata, Palaeoneilo smithi, Palaeoneilo subcarinata, Palaeoneilo subexcentrica, Palaeoneilo suborbicularis, Palaeoneilo subtenella, Palaeoneilo sunanensis, Palaeoneilo symmetricus, Palaeoneilo tebagaensis, Palaeoneilo thorslundi, Palaeoneilo tirolensis, Palaeoneilo yanjiensis, Palaeoneilo yongdingensis
Ecology: facultatively mobile infaunal deposit feeder