Genus Ptychina R. A. Philippi, 1836

(3-4-4-0-20-6-2-20-0-0-0-0-0)
Ref. Vokes, 1980 p 105
[=Thyasira W. E. Leach in J. B. P. A. de Lamarck, 1818]
Ref. Vaught, 1989 p 125