1. Subgenus Marconia (Stenomarconia) Germain, 1934 accepted as Gonaxis (Stenomarconia) Germain, 1934 represented as Gonaxis J. W. Taylor, 1877 (original combination)
   1. Species Marconia (Stenomarconia) jeanneli Germain, 1934 accepted as Gonaxis (Stenomarconia) jeanneli (Germain, 1934) represented as Gonaxis jeanneli (Germain, 1934) (original combination)
2. Species Marconia costata (Verdcourt, 1963) † accepted as Gonaxis costata Verdcourt, 1963 † (unaccepted > superseded combination)
3. Species Marconia elegans Pickford, 2019 † accepted as Gonaxis elegans (Pickford, 2019) † (unaccepted > superseded combination, Marconia is considered a junior synonym of Gonaxis)
4. Species Marconia elgonensis (Preston, 1913) accepted as Gonaxis elgonensis (Preston, 1913) (unaccepted > superseded combination)
5. Species Marconia gibbosa Bourguignat, 1890 accepted as Gonaxis gibbosus (Bourguignat, 1890) (original combination)
6. Species Marconia gravieri (Germain, 1907) accepted as Gulella gravieri (Germain, 1907)
7. Species Marconia hamiltoni (E. A. Smith, 1897) accepted as Austromarconia hamiltoni (E. A. Smith, 1897) (unaccepted > superseded combination)
8. Species Marconia kivuensis (Preston, 1913) accepted as Gonaxis kivuensis (Preston, 1913) (unaccepted > superseded combination)
9. Species Marconia kizinga Tattersfield, 1999 accepted as Gonaxis kizinga (Tattersfield, 1999) (original combination)
10. Species Marconia lata (E. A. Smith, 1880) accepted as Gonaxis lata (E. A. Smith, 1880) (unaccepted > superseded combination)
11. Species Marconia latula E. von Martens, 1895 accepted as Gonaxis latula (E. von Martens, 1895) (unaccepted > superseded combination)
12. Species Marconia malavensis (Kobelt, 1904) accepted as Austromarconia malavensis (Kobelt, 1904) (unaccepted > superseded combination)
13. Species Marconia margarita (Preston, 1913) accepted as Gonaxis margarita (Preston, 1913) (unaccepted > superseded combination)
14. Species Marconia masabana Connolly, 1930 accepted as Gonaxis masabana (Connolly, 1930) (original combination)
15. Species Marconia mzinga Tattersfield, 1999 accepted as Gonaxis mzinga (Tattersfield, 1999) (original combination)
16. Species Marconia recta Bourguignat, 1890 accepted as Gonaxis recta (Bourguignat, 1890)
17. Species Marconia translucida (Dupuis & Putzeys, 1902) accepted as Gonaxis translucidus (Dupuis & Putzeys, 1901) (unaccepted > superseded combination)
18. Species Marconia vitrea (Morelet, 1867) accepted as Gonaxis vitreus (Morelet, 1867) (unaccepted > superseded combination)

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