[On the discovery of a new form of monocyath Archaeocyatha with an additionally porous framework (Butakovicyathus butakovi gen. et sp. nov.] Rossiiskaya Akademiya Nauk Sibirskoe Otdelenie Trudy Instituta Geologii i Geofiziki, 463 1980: 174-176. 175 [Zoological Record Volume 117]