Check-lists
* List of countries might not be complete
Links and literature
[1] Rahman I., Stewart S. & Zamora S. (2014): The Youngest Ctenocystoids from the Upper Ordovician of the United Kingdom and the Evolution of the Bilateral Body Plan in Echinoderms, Acta Palaeontologica Polonica. 60. [as Conollia sporranoides Rahman, Stewart & Zamora, 2015]
Rahman I., Stewart S. & Zamora S. (2014): The Youngest Ctenocystoids from the Upper Ordovician of the United Kingdom and the Evolution of the Bilateral Body Plan in Echinoderms, Acta Palaeontologica Polonica. 60. [as Conollia sporranoides Rahman, Stewart & Zamora, 2015]