Invalid subtaxa: Mytilacea Rafinesque 1815 [replaced name], Mytilaeea Rafinesque 1815 [replaced name]
Parent taxon: Mytilida according to J. G. Carter et al. 2011
See also Adegoke 1977, Bieler and Mikkelsen 2006, Bouchet et al. 2010, Dockery 1982, Giribet and Wheeler 2002, Glenn 1904, Griffin et al. 2008, Hickman 2023, Maxwell 1992, Nevesskaja 2009, Newell 1965, Ride et al. 1999, Squires 1984, Squires 1987, Squires and Goedert 1991, Stilwell and Zinsmeister 1992, Todd 2001, Vokes 1980 and Ward and Blackwelder 1987
Sister taxa: Fungiacara, Isognomoidea, Lunulacardioidea, Malleoidea, Modiolopsoidea, Modiomytilus, Myapalmula, Mysidielloidea, Mytilon, Paramusculus, Regoria, Regulifer, Septiola, Skarlatella, Striamodiolus, Strimodiolus
Subtaxa: Crenellidae Mytilidae Septiferidae Sootryenella
Ecology: stationary low-level epifaunal suspension feeder