Callonema scalariforme
Haplospira variablis
Holopea ampla
Holopea antiqua
Holopea applanata
Holopea appressa
Holopea arctica
Holopea brucei
Holopea concinnula
Holopea elizabethi
Holopea enjalrani
Holopea excelsa
Holopea flintonensis
Holopea furmaniana
Holopea gaspesia
Holopea gigantea
Holopea hubbardi
Holopea hudsoni
Holopea incerta
Holopea insignis
Holopea iowaensis
Holopea magniventra
Holopea marylandica
Holopea missouriensis
Holopea nashvillensis
Holopea nitidissima
Holopea obliqua
Holopea obsoleta
Holopea ophelia
Holopea oxfordensis
Holopea paludiniformis
Holopea parvula
Holopea perforata
Holopea planidorsata
Holopea proutana
Holopea pyrene
Holopea raymondia
Holopea rossbrookiensis
Holopea rotunda
Holopea rowei
Holopea scrutator
Holopea supraplana
Holopea sweeti
Holopea symmetrica
Holopea transversa
Holopea varicosa
Holopea vaurealense
Holopea vigneauensis
Holopea voluta
Spirorapha corrugata