(Woodring, 1930) Asterocyclinidae Eocene unknown type specimen holotype 1 / FEU-1019902 | (Woodring, 1930) Asterocyclinidae Eocene unknown type specimen holotype 2 / FEU-1019903 | (Woodring, 1930) Asterocyclinidae Eocene unknown type specimen holotype 3 / FEU-1019904 | (Woodring, 1930) Asterocyclinidae Eocene unknown type specimen holotype 4 / FEU-1019905 | Coryell & Embich, 1937 Asterocyclinidae Eocene unknown type specimen holotype 5 / FEU-1022150 | |||||
(Woodring, 1930) Asterocyclinidae Eocene Western Canada and USA SINMNH type specimen holotype 6 / FEU-1023651 |