Hallangia Westblad, 1946 (basis of record)
Hallangia Westblad, 1946 (extant flag source)
Imogine Girard, 1853 accepted as Imogine Marcus & Marcus, 1968 (extant flag source)
Imogine Girard, 1853 accepted as Imogine Marcus & Marcus, 1968 (basis of record)
Notoplana Laidlaw, 1903 (extant flag source)
Notoplana Laidlaw, 1903 (basis of record)
Pseudoceros Lang, 1884 (extant flag source)
Pseudoceros Lang, 1884 (basis of record)
Pterastericola Beklemischev, 1926 (basis of record)
Pterastericola Beklemischev, 1926 (extant flag source)
Stylochus Ehrenberg, 1831 (extant flag source)
Stylochus Ehrenberg, 1831 (basis of record)
Thysanozoon Grube, 1840 (extant flag source)
Thysanozoon Grube, 1840 (basis of record)
Urastoma Dörler, 1900 (basis of record)
Urastoma Dörler, 1900 (extant flag source)