This article follows Chan et al. (2021) and WoRMS in placing Thoracica as an infraclass of
Thecostraca and in the following classification of thoracicans down to the level of family: : Infraclass Thoracica Darwin, 1854 :: Superorder
Phosphatothoracica Gale, 2019 ::: Order
Iblomorpha Buckeridge & Newman, 2006 :::: Family
Iblidae Leach, 1825 :::: Family
Idioiblidae Buckeridge & Newman, 2006 ::: Order †
Eolepadomorpha Chan et al., 2021 :::: Family †
Eolepadidae Buckeridge, 1983 :::: Family †
Praelepadidae Chernyshev, 1930 :: Superorder
Thoracicalcarea Gale, 2015 ::: Order
Balanomorpha Pilsbry, 1916 :::: Superfamily
Balanoidea Leach, 1817 ::::: Family
Balanidae Leach, 1817 ::::: Family
Pyrgomatidae Gray, 1825 :::: Superfamily
Chthamaloidea Darwin, 1854 ::::: Family
Catophragmidae Utinomi, 1968 ::::: Family
Chionelasmatidae Buckeridge, 1983 ::::: Family
Chthamalidae Darwin, 1854 ::::: Family
Pachylasmatidae Utinomi, 1968 ::::: Family
Waikalasmatidae Ross & Newman, 2001 :::: Superfamily
Coronuloidea Leach, 1817 ::::: Family
Austrobalanidae Newman & Ross, 1976 ::::: Family
Bathylasmatidae Newman & Ross, 1971 ::::: Family
Chelonibiidae Pilsbry, 1916 ::::: Family
Coronulidae Leach, 1817 ::::: Family
Tetraclitidae Gruvel, 1903 :::: Superfamily
Elminioidea Chan et al., 2021 ::::: Family
Elminiidae Foster, 1982 :::: Superfamily †
Pachydiadematoidea Chan et al., 2021 ::::: Family †
Pachydiadematidae Chan et al., 2021 ::: Order
Calanticomorpha Chan et al., 2021 :::: Family
Calanticidae Zevina, 1978 :::: Family †
Cretiscalpellidae Buckeridge, 1983 :::: Family †
Titanolepadidae Gale & Sørensen, 2015 ::: Order
Pollicipedomorpha Chan et al., 2021 :::: Family
Lithotryidae Gruvel, 1905 :::: Family
Pollicipedidae Leach, 1817 :::: Family †
Zeugmatolepadidae Newman, 1996 ::: Order
Scalpellomorpha Buckeridge & Newman, 2006 :::: Superfamily
Lepadoidea Chan et al., 2021 ::::: Family
Heteralepadidae Nilsson-Cantell, 1921 ::::: Family
Lepadidae Darwin, 1852 ::::: Family
Malacolepadidae Hiro, 1937 ::::: Family
Poecilasmatidae Annandale, 1909 ::::: Family
Rhizolepadidae Zevina, 1980 :::: Superfamily
Neolepadoidea Chan et al., 2021 ::::: Family
Neobrachylepadidae Newman & Yamaguchi, 1995 ::::: Family
Neolepadidae Yamaguchi, Newman & Hashimoto, 2004 ::::: Family
Neoverrucidae Newman, 1989 in Hessler & Newman, 1989 ::::: Family
Probathylepadidae Ren & Sha, 2015 :::: Superfamily
Scalpelloidea Chan et al., 2021 ::::: Family
Scalpellidae Pilsbry, 1907 ::::: Family †
Proverrucidae Newman, 1989 in Hessler & Newman, 1989 ::: Order
Verrucomorpha Pilsbry, 1916 :::: Family
Verrucidae Darwin, 1854 :::: Family †
Eoverrucidae Gale, 2020 ::: Order †
Archaeolepadomorpha Chan et al., 2021 :::: Family †
Archaeolepadidae Gale, 2019 :::: Family †
Myolepadidae Gale, 2015 in Gale & Sørensen, 2015 :::: Family †
Stramentidae Withers, 1920 ::: Order †
Brachylepadomorpha Withers, 1923 :::: Family †
Brachylepadidae Woodward, 1901 ==References==