Genus Grimpella G. C. Robson, 1928

(4-3-2-2-5-2-1-7-0-0-0-0-0)
Ref. Nesis, 1987 p 298
Vaught, 1989 p 113

thaumastocheik G. C. Robson, 1928 [T]
(4-3-2-2-5-2-1-7-0-1-0-0-0)
Ref. Nesis, 1987 p 298 d