Ptychamalia is een geslacht van vlinders van de familie spanners (Geometridae), uit de onderfamilie Sterrhinae.
Soorten P. ariana Ebert, 1965 P. botydata Walker, 1861 P. brunneata Warren, 1905 P. costifera Dyar, 1914 P. cumana Schaus, 1901 P. dognini Prout, 1922 P. exempta (Prout, 1926) P. gerana Dognin, 1890 P. grisescens Warren, 1905 P. immunda Dognin, 1908 P. inamoena Dognin, 1902 P. insolata Felder, 1875 P. ligys (Prout, 1926) P. magitaria Jones, 1921 P. melanoma Prout, 1932 P. narogena Schaus, 1901 P. nigromarginata Dognin, 1890 P. nubila Dognin, 1900 P. parallela Prout, 1910 P. perbrunneata Prout, 1920 P. perlata Warren, 1900 P. platensis Prout, 1910 P. ptychopoda Prout, 1910 P. pulverea Butler, 1881 P. reducta Dognin, 1908 P. sara Prout, 1932 P. sericea Dognin, 1910 P. simplex Warren, 1901 P. subcuprea Warren, 1907 P. tactiturna Dognin, 1900