Aclis dumasi de Boury, 1902 † (original description)
Acmaea bourdoti Cossmann, 1902 † accepted as Patella bourdoti (Cossmann, 1902) † (original description)
Auricula scotina Cossmann, 1902 † accepted as Ellobium scotinum (Cossmann, 1902) † (original description)
Bithinella dumasi Cossmann, 1902 † accepted as Bythinella dumasi Cossmann, 1902 † (original description)
Collonia megalomphalus Cossmann, 1902 † accepted as Circulopsis megalomphalus (Cossmann, 1902) † (original description)
Cypraea (Luponia) aequipartita Cossmann, 1902 † accepted as Lozouetina recluzi (Cossmann, 1897) † (original description)
Gibbula bourdoti Cossmann, 1902 † (original description)
Helix armoricensis Cossmann, 1902 † accepted as Acanthinula armoricensis (Cossmann, 1902) † (original description)
Helix cenchridium Cossmann, 1902 † accepted as Acanthinula cenchridium (Cossmann, 1902) † (original description)
Limnaea oncodes Cossmann, 1902 † accepted as Galba oncodes (Cossmann, 1902) † (original description)
Mathildia distinguenda Cossmann, 1902 † accepted as Mathilda distinguenda (Cossmann, 1902) † (original description)
Melongena (Pugilina) marcellini Cossmann, 1902 † accepted as Editharus marcellini (Cossmann, 1902) † (original description)
Nerita internuda Cossmann, 1902 † accepted as Pseudodostia internuda (Cossmann, 1902) † (original description)
Nerita namnetensis Cossmann, 1902 † accepted as Nerita namnetica Vasseur, 1882 † accepted as Pseudodostia namnetica (Vasseur, 1882) † (original description)
Norrisia radiata Cossmann, 1902 † accepted as Charisma radiata (Cossmann, 1902) † (original description)
Otomphalus Cossmann, 1902 † (original description)
Phasianella vasseuri Cossmann, 1902 † accepted as Tricolia vasseuri (Cossmann, 1902) † (original description)
Scutum contractum Cossmann, 1902 † accepted as Marbodaeia contracta (Cossmann, 1902) † (original description)
Scutum crassiradiatum Cossmann, 1902 † accepted as Marbodaeia crassiradiata (Cossmann, 1902) † (original description)
Scutum patulum Cossmann, 1902 † accepted as Proscutum patulum (Cossmann, 1902) † (original description)
Tenuiscala mesomorpha Cossmann, 1902 † accepted as Cerithiscala mesomorpha (Cossmann, 1902) † (original description)
Tinostoma guttiferum Cossmann, 1902 † accepted as Callodix guttifera (Cossmann, 1902) † (original description)

France for Aclis dumasi de Boury, 1902 † 
France for Acmaea bourdoti Cossmann, 1902 † 
France for Bithinella dumasi Cossmann, 1902 † 
France for Collonia megalomphalus Cossmann, 1902 † 
France for Helix armoricensis Cossmann, 1902 † 
France for Helix cenchridium Cossmann, 1902 † 
France for Limnaea oncodes Cossmann, 1902 † 
France for Mathildia distinguenda Cossmann, 1902 † 
France for Nerita internuda Cossmann, 1902 † 
France for Norrisia radiata Cossmann, 1902 † 
France for Phasianella vasseuri Cossmann, 1902 † 
France for Scutum contractum Cossmann, 1902 † 
France for Scutum crassiradiatum Cossmann, 1902 † 
France for Scutum patulum Cossmann, 1902 † 
France for Tenuiscala mesomorpha Cossmann, 1902 † 
France for Tinostoma guttiferum Cossmann, 1902 † 

 Additional information

 for Poirieria levis Traub, 1979 †

Originally: ? Poirieria [details]

 Nomenclature

 for Tudicla zottmaieri Traub, 1979 †

Originally: Tudicla (Sceptrum) [details]

 Type locality

 for Bithinella dumasi Cossmann, 1902 †

Saffré (Le Bois Gouet) ("Bois-Gouet"), Loire-Atlantique, France [details]

 Type locality

 for Helix armoricensis Cossmann, 1902 †

Saffré (Le Bois Gouet) ("Bois-Gouet"), Loire-Atlantique, France [details]

 Type locality

 for Helix cenchridium Cossmann, 1902 †

Saffré (Le Bois Gouet) ("Bois-Gouet"), Loire-Atlantique, France [details]

 Type locality

 for Limnaea oncodes Cossmann, 1902 †

Campbon (Château de Coislin), Loire-Atlantique, France; Lutetian, middle Eocene [details]