1. Subgenus Trajanella (Paosia) G. Boehm, 1895 † accepted as Paosia G. Boehm, 1895 † (unaccepted > superseded rank)
   1. Species Trajanella (Paosia) zitteli Delpey, 1938 † accepted as Paosia zitteli (Delpey, 1938) † (unaccepted > superseded combination)
2. Species Trajanella acuminata F. M. Anderson, 1958 † accepted as Paosia acuminata (F. M. Anderson, 1958) † (unaccepted > superseded combination)
3. Species Trajanella acuminata Kollmann, 1979 † accepted as Paosia kollmanni Squires & Saul, 2004 † (unaccepted > junior homonym, junior homonym of Trajanella acuminata F. M. Anderson, 1958; Paosia kollmanni is a replacement name)
4. Species Trajanella alsusensis Pchelintsev, 1931 † accepted as Paosia alsusensis (Pchelintsev, 1931) † (unaccepted > superseded combination)
5. Species Trajanella angusta Pchelintsev, 1927 † accepted as Paosia angusta (Pchelintsev, 1927) † (unaccepted > superseded combination)
6. Species Trajanella boulei Collignon, 1933 † accepted as Paosia boulei (Collignon, 1933) † (unaccepted > superseded combination)
7. Species Trajanella brevispira Douvillé, 1916 † accepted as Paosia brevispira (Douvillé, 1916) † (unaccepted > superseded combination)
8. Species Trajanella clansayesiensis Delpey, 1942 † accepted as Paosia clansayesiensis (Delpey, 1942) † (unaccepted > superseded combination)
9. Species Trajanella conoidea Pchelintsev, 1927 † accepted as Paosia conoidea (Pchelintsev, 1927) † (unaccepted > superseded combination)
10. Species Trajanella cristobaldi (Verneuil & Lorière, 1868) † accepted as Paosia cristobaldi (Verneuil & Lorière, 1868) † (unaccepted > superseded combination)
11. Species Trajanella dutoiti Rennie, 1930 † accepted as Paosia dutoiti (Rennie, 1930) † (unaccepted > superseded combination)
12. Species Trajanella fraasi (Dietrich, 1914) † accepted as Paosia fraasi (Dietrich, 1914) † (unaccepted > superseded combination)
13. Species Trajanella glabra Pchelintsev, 1931 † accepted as Paosia glabra (Pchelintsev, 1931) † (unaccepted > superseded combination)
14. Species Trajanella godoganiensis Pchelintsev, 1951 † accepted as Paosia godoganiensis (Pchelintsev, 1951) † (unaccepted > superseded combination)
15. Species Trajanella jacobi Delpey, 1938 † accepted as Paosia jacobi (Delpey, 1938) † (unaccepted > superseded combination)
16. Species Trajanella japonica Nagao, 1934 † accepted as Paosia fraasi (Dietrich, 1914) † (unaccepted > junior subjective synonym)
17. Species Trajanella komarensis Pchelintsev, 1927 † accepted as Paosia komarensis (Pchelintsev, 1927) † (unaccepted > superseded combination)
18. Species Trajanella konobensis Pchelintsev, 1963 † accepted as Paosia konobensis (Pchelintsev, 1963) † (unaccepted > superseded combination)
19. Species Trajanella munieri Popovici-Hatzeg, 1899 † accepted as Paosia munieri (Popovici-Hatzeg, 1899) † (unaccepted > superseded combination)
20. Species Trajanella ornata Pchelintsev, 1951 † accepted as Paosia ornata (Pchelintsev, 1951) † (unaccepted > superseded combination)
21. Species Trajanella pontica Pchelintsev, 1927 † accepted as Paosia pontica (Pchelintsev, 1927) † (unaccepted > superseded combination)
22. Species Trajanella romani Brun & Chatelet, 1926 † accepted as Paosia romani (Brun & Chatelet, 1926) † (unaccepted > superseded combination)
23. Species Trajanella rovikensis Djalilov, 1964 † accepted as Paosia rovikensis (Djalilov, 1964) † (unaccepted > superseded combination)
24. Species Trajanella subamphora Pchelintsev, 1951 † accepted as Paosia subamphora (Pchelintsev, 1951) † (unaccepted > superseded combination)
25. Species Trajanella subgigantea Pchelintsev, 1951 † accepted as Paosia subgigantea (Pchelintsev, 1951) † (unaccepted > superseded combination)
26. Species Trajanella vera Pchelintsev, 1927 † accepted as Paosia vera (Pchelintsev, 1927) † (unaccepted > superseded combination)

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