Halilov, A. G. & Melikov, O. G. (1988). [Sea urchins]. Pp. 184-213 in A. A. Ali-zade (ed.) [Cretaceous fauna of Azerbaijan] Akademiya Nauk Azerbaijdzhanskoj SSR, Institut Geologii I.M. Gubkina / Izdatelvstvo Elm, Baku. page(s): 198; figs. 35-37, pl. 6б: figs 2а-г [details] Available for editors
original descriptionHalilov, A. G. & Melikov, O. G. (1988). [Sea urchins]. Pp. 184-213 in A. A. Ali-zade (ed.) [Cretaceous fauna of Azerbaijan] Akademiya Nauk Azerbaijdzhanskoj SSR, Institut Geologii I.M. Gubkina / Izdatelvstvo Elm, Baku. page(s): 198; figs. 35-37, pl. 6б: figs 2а-г [details] Available for editors