Acroptychia salvati (Fischer-Piette & Bedoucha, 1965) (new combination reference)
Boucardicus crassus J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Boucardicus malama J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Boucardicus minoratus J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Ctenophila tangolika J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Cyclotopsis pectinata J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Gulella anjajavyensis J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Gulella antonibe J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Gulella foucaultia J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Gulella martiniana J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Gulella volontany J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Kalidos mahafatifaty J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Kalidos narindanus J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Kalidos quadrangulatus J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Kalidos unistriatus J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Malagarion terzi (Fischer-Piette, C. P. Blanc, F. Blanc & F. Salvat, 1994) (new combination reference)
Microcystis embertoni J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Microcystis zorony J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Omphalotropis lavanensis J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Parvedentulina lavana J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Sitala dickensi J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Tropidophora jugia J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Tropidophora narindana J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Tropidophora neoliratoides J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Tropidophora rovidrovitra J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)
Tropidophora secunda Fischer-Piette & Bedoucha, 1965 accepted as Tropidophora bathiei Fischer-Piette, 1949 (source of synonymy)
Tropidophora tenona J. Gerlach, O. Griffiths & Slapcinsky, 2023 (original description)

Madagascar for Boucardicus crassus J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Boucardicus malama J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Boucardicus minoratus J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Ctenophila tangolika J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Cyclotopsis pectinata J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Gulella anjajavyensis J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Gulella antonibe J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Gulella martiniana J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Gulella volontany J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Kalidos mahafatifaty J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Kalidos quadrangulatus J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Kalidos unistriatus J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Microcystis embertoni J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Microcystis zorony J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Omphalotropis lavanensis J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Parvedentulina lavana J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Sitala dickensi J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Tropidophora jugia J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Tropidophora narindana J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Tropidophora neoliratoides J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Tropidophora rovidrovitra J. Gerlach, O. Griffiths & Slapcinsky, 2023 
Madagascar for Tropidophora tenona J. Gerlach, O. Griffiths & Slapcinsky, 2023