Traits taxon details
original description
(of Pygaulus aksuensis Shmidt & Simakov, 1953 †) Shmidt, O. I. & Simakov, S. N. 1953. [Late Cretaceous sea urchins from south-eastern Middle Asia]. Trudy Vsesoyuznogo Neftyanogo Nauchno-Issledovatel'skogo Geologo-Razvedochnogo Instituta (N.S.) 66, 5-75. page(s): 38; figs 5а-б, pl. 2: figs 4-6 [details]
new combination reference
Egorov, E. V. 1972. [Stratigraphical distribution of Upper Cretaceous echinoids of Tadzhikistan]. Doklady Akademii Nauk Tadzikskoj SSR 15, 59-61. page(s): 59 [details]
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