• Diplococcus Weichselbaum (unaccepted > nomen nudum)
• Diplococcus constellatus Prévot, 1924 accepted as Streptococcus constellatus (Prévot, 1924) Holdeman & Moore, 1974
• Diplococcus glycinophilus Cardon & Barker, 1946 accepted as Peptococcus glycinophilus (Cardon & Barker 1946) Douglas, 1957
• Diplococcus gonorrhoeae (Zopf, 1885) Lehmann & Neumann, 1896 accepted as Neisseria gonorrhoeae (Zopf 1885) Trevisan, 1885
• Diplococcus magnus Prévot, 1933 accepted as Peptococcus magnus (Prévot, 1933) Holdeman & Moore, 1972
• Diplococcus magnus Prévot, 1933 accepted as Peptostreptococcus magnus (Prévot, 1933) Ezaki et al., 1983
• Diplococcus morbillorum Prévot, 1933 accepted as Streptococcus morbillorum (Prévot, 1933) Holdeman & Moore, 1974
• Diplococcus morbillorum Prévot, 1933 accepted as Gemella morbillorum (Prévot, 1933) Kilpper-Bälz & Schleifer, 1988
• Diplococcus mucosus von Lingelsheim, 1906 accepted as Neisseria mucosa Véron et al., 1959
• Diplococcus pneumoniae (Klein, 1884) Weichselbaum, 1886 accepted as Streptococcus pneumoniae (Klein, 1884) Chester, 1901
• Diplococcus siccus von Lingelsheim, 1908 accepted as Neisseria sicca (von Lingelsheim 1908) Bergey et al., 1923